POTENTIAL FOR SOME VARIETY UPTAKE RICE SWAMP LAND IN TIDAL ACID SULPHATE NEW OPENINGS

Asmahan Akhmad 1), Suntoro Wongso Atmojo 2),Saeri Sagiman 3) and Widyatmani Sih Dewi 2)

                                                             1) Student University Graduate Program of March Surakarta.2) Lecturer University Graduate Program of March Surakarta

3) Faculty of Agriculture, University of Tanjungpura Pontianak.     

ABSTRAKS  

Population growth, which grew rapidly from year to year has implications for the needs of foodstuffs also increased. On the other hand, the conversion of productive land into non-agricultural

land such as residential, urban and infrastructure development and other needs that can not be avoided. This prompted the government to look for potential land that has not been used optimally.

One attempt to solve the problem is with the expansion of planting areas and new paddy fields coming from opening new land. The opening of new land or new paddy fields meant is open lands derived

from secondary forest land by way of reclaiming land, making levees, floodgates, grammar channels and rice fields. Therefore, this area contained in the tidal marsh land dominated by acid sulfate soil,

the land is classified into marginal land or problematic. In general, the problem of acid sulphate soils for agriculture are: the availability of macro and micro nutrients low to very low, acid soil pH to very acidic, many toxic compounds, nutrients are in a bound state, the existence of a shallow layer of pyrite and land drainage impeded. Based on these conditions, only rice plants that can be grown on the land, but production is still very low, averaging 1.5 tonnes / hectare. Efforts to increase the productivity of

acid sulphate soils, liming and fertilization is required. After the treatment is given, also required plant tissue analysis to determine the potential uptake of some varieties of rice. The results showed that soil type Histic sulfaquents with moderate fertility levels and the toughest obstacles exist in the presence of a shallow layer of pyrite and toxic compounds. Beradasarkan ANOVA, almost all of the results of the analysis of nutrient uptake and the upper part of the roots of rice plants, either in-house research

and in the field of plastic, real effect. Varieties Ringkak Janggut (local) most potential in nutrientuptake.========================================================================Keywords: potential, tidal wetlands, acid sulphate soils, new openings, the rice plants

1.Introduction          Rice (Oryza sativa. L) is a rice crop which is a staple food for most Asian societies, even in every Ben, except Antarctica (Umadevi et al, 2009), (Jing and Jichao, 2012), (Omatola and Onojah (2012) and Veni et al (2013). Thus Agriculture (Rice), is still a major sector in many countries (Owusu et al, 2013). However, in line with the demand for rice is increasing every year, as a result of population growth and the decreasing agricultural productive land changed into non-agricultural land, it is necessary to land the new openings, new openings land is cleared and comes from secondary forest land and have not been planted with rice (food). The management of the land, should be given emphasis to the development of appropriate technology-specific fit, so that farming is done in accordance with agro-ecological and farmer participation be made a priority (Reddy et al, 2001). In West Kalimantan, opening new land that can be utilized is marginal land, such as tidal swamp land sulfate sour (Adi Widjaja and Alihamsyah, 1998). Acid sulphate soils is one of the types of soil found in some parts of Indonesia (Adi Widjaja and Alihamsyah, 1998). The spread of acid sulphate soils occur in swampy areas that are affected by tidal water depth variations that depend on the period of sedimentation (Widowati and Sukristiyonubowo, 2006). The development of agriculture (rice) in the area of tidal marsh acid sulfate has various problems, such as high soil acidity (volatile), the difficulty of estimating the occurrence of floods and many toxic compounds, such as Fe (Nurzakiah et al, 2012). In the anaerobic conditions (acid sulphate), sulfate and iron ions respectively reduced and turned into iron ions which then ends up forming pyrite (Akhmad, 1996) and (Rosilawati, et al, 2014). The amount of sulfuric acid content, resulting in this land become infertile (Ali et al, 2012) and (Hairani

and Ani Susilawati, 2013). The wetlands occur environmental variability, such as: runoff, erosion, flooding, sediment deposition and positively correlated to soil microbial richness (Bruland and Richadson, 2005). Testing several varieties of rice and amelioration, will get varieties that have the best potential for nutrient uptake in rice (Zahra, 2010). Liming is one of the efforts to improve the biological properties of the soil (Basu et al, 2011) and reduce the negative effects of sulfuric acid on acid soils (Sadiq and Umara Babagana, 2012). Liming can reduce soil acidity and Al toxicity in acid sulphate soils (Nurzakiah et al, 2012). Calcification can also improve soil fertility, soil pH, cation exchange capacity, Ca confused, Mg, P and K are available, along with a decrease in the content of Al (Shamsuddin and Fauziah, 2010). Fertilization is intended to improve soil fertility (Akhmad, 1985), because it can provide nutrients to plants (Raut et al, 2013). The availability of nutrients or plant nutrition is very important, especially nitrogen in various stages of growth and production of rice (Pathat et al, 2006), (Lavanya and Ganapathy, 2009) and (Assefa et al, 2013). To determine whether the liming and fertilization effect on the potential uptake some rice varieties, the plant tissue analyzed the roots and the top of the plant. Thus, the purpose of this study are: To obtain rice varieties potential nutrient uptake highest tidal swamp land acid sulphate new openings.2.Methods         This research was carried out in plastic house and in the field. Research in plastic housings, made in the land of the Faculty of Agriculture, University of Tanjungpura Pontianak. While the land was taken from the village of Teluk Pakedai Remis Strait. This study dilaksanaka for 5 months, from early March until the end of August 2013. The study began with the manufacture of plastic house and prepare all the equipment and materials to be used for research and observation and recording of data based on the variables that have been made. Field research conducted in the village of Teluk Pakedai Remis Strait. Research over the past 6 months, since mid-November 2013 to mid-May 2014. The variable uptake (45 HST), covering the roots and the top of the plant are: N, P, K, Ca, Mg, Fe and S.         Both studies using a factorial experiment with a randomized block design (RAK) with 2 factors (V and P). Research in the plastic house, the first six rice varieties, namely: V1 (Variety Ciherang), V2 (Variety Bagendit), V3 (Variety Inpara 3), V4 (Variety Mira.1), V5 (Variety Si more low), V6 ( Ringkak varieties beard). The second factor is the dose dolomite liming and NPK fertilization with label P, consists of three levels: P1 (1 tonne dolomite and 60 kg NPK / ha), P2 (2 tons of dolomite and 90 kg NPK / ha) and P3 (3 tons dolomite lime and 120 kg NPK / ha). Of the two factors mentioned above, there are 18 combinations of treatment with four (4) replicates, so there are 72 combinations of treatments. For research in the field, the first three varieties of rice, which are: Varieties Bagendit, V2 and V3 Varieties Varieties Mira.1 Ringkak beard. The second factor is the fifth dose of dolomite liming and NPK fertilization, namely: P0 (0 tonnes of dolomite lime-0 kg NPK / ha), P1 (1 tonne dolomite-60 kg NPK / ha), P2 (2 tons of dolomite lime-120 kg NPK / ha), P3 (three tonne dolomite 180 kg NPK / ha) and P4 (4 tons of dolomite-240 kg NPK / ha). Of the two factors mentioned above, there were 15 treatment combinations with repetition, so there are 45 combinations of treatments. 3. Results and Discussion3.1. Research In Plastichouse.3.1.1. In Part Root Nutrient Uptake of Rice (45 HST)3.1.1.1. Nitrogen

Figure 1. Plot Nutrient Uptake Nitrogen (45 HST)

            Based on ada data, it can be explained that the treatment varieties and dolomite liming treatment NPK-fertilizer interaction. While in Figure 1, shows that the combined treatment V6P3 shows the highest and lowest V5P1 showed the combination treatment.            According to Patti et. al. (2013) Nitrogen (N) is a major nutrient for plant growth. N function, namely: to increase vegetative growth, increasing the number of tillers and increasing the number of grains / hill and increase the size of grain of rice. However, N is the nutrient most often limited to land paddy, the main causes loss of N from the soil paddy is through denitrification and leaching. N fertilizer management should pay attention to lost through denitrification and leaching of N is (Pujiastuti, 2006). This shows that the uptake of nutrients nitrogen in rice plants of the highest when compared with other treatment combination. This is supported by nutrients in the soil sufficient N available during the phase of growth, less N or N metabolic disturbance at a particular time range will limit the generative phase. Therefore, to obtain nutrient uptake and high yield, nutrient N should be provided with sufficient during the growth phase (Sudjana, 2014). The occurrence of a loss of N in rice plants derived from manure as a result of nitrification amides and ammonium to nitrate, then inhibiting the conversion of N-NH4 + to N-NO 3 by inhibiting the growth or activity of Nitrosomonas, tested to minimize the loss (Pujiastuti, 2006).3.1.1.2. Phosphorus

 Figure 2. Plot of Phosphorus Nutrient Uptake (45 HST)            From the data obtained, it can be explained that between the two treatments, the varieties and dolomite liming-fertilization NPK interaction. While from Figure 19, it appears that a combination treatment V6P2 V1P2 highs and lows.           Phosphorus (P) is a nutrient required by plants in large amounts (macro), but the number P is smaller when compared with N and K. For serapapan of P in the roots of rice plants ranged from 0.01 to 0.08%, whereas to the top of the plant ranged from 0.08 to 0.21%. According to Makarim (2005) optimal levels of P in the plant during the vegetative growth is from 0.3 to 0.5%. Further explained, that the P absorbed by plants in the form of primary orthophosphate ion (H2SO4-) and orthophosphate ion secondary (H2PO42-) and a small amount is firofosfat and metaphosphate and organic phosphate compounds form water-soluble, for example nucleic acids and fitin.3.1.1.3. Potassium

 Figure 3. Plot of Potassium Nutrient Uptake (45 HST)

Based on the data, it appears that there is interaction between the two treatments, ie varieties and dolomite liming-fertilization NPK. Figure 3 can be explained, that is combination treatment V6P2 the highest, while the lowest V1P2.            Potassium (K) is an essential nutrient in addition to N and P. Although K in the soil is quite large, but the percentage of available for plants during the growing season low. Nutrient uptake by roots of rice plants ranged from 0.01 to 0.08%, while the upper part of the rice plant from 0.08 to 0.21%. According Buckmann and Brady (1982), that the availability of K in the soil can be classified into: K immediately available, K and K are relatively slow terdia not available. Relatively K available forms include 90-98% of the total K in mineral soil. Compounds that are relatively unavailable feldpar and mica are relatively resistant to weathering. But with the influence of water containing carbonate and the acidic clay will help the process of destruction of the primary mineral and consequently be exempt element K and other bases. Further explained, that the slow K available forms include 18-20% of the total K in the soil. K form is fixed by mineral 2: 1 as illite, chlorite and vermiculite. K is fixed can not be replaced through nutrient exchange system, so that it becomes available later.3.1.1.4. Calcium

 Figure 4. Plot Nutrient Absorption Calcium (45 HST)            Based on the data, it appears that there is interaction between the two treatments, ie varieties and dolomite liming-fertilization NPK. Whereas from Figure 4 can be explained, that is combination treatment V5P2 highest and lowest V1P2.            For Ca uptake by roots of rice plants ranged from 0.08 to 0.64, while for the top of the rice plant from 0.24 to 0.44%. Ca nutrients are absorbed in the form of divalent cations Ca2 +. Ca2 + uptake is limited to the tip of the root: root area youth who have not experienced the endodermis cell wall suberisasi. Ca enter through the xylem pembuluih apoplastik. Freight limited penetrate the membrane, root growth is necessary in order to continuously meet the needs of decision-Ca. Freight through the xylem, Ca carried away by the flow of water transpiration, limited mobility through the phloem (Gadrner et. Al., 1991).3.1.1.5. Magnesium

 Figure 5. Plot Nutrient Absorption Magnesium (45 HST)

            From the data can be explained, that between the two treatments, the varieties and dolomite liming-fertilization NPK interaction. For Figure 5 can be explained, that is combination treatment V5P2 the highest, while the lowest V1P2.            For Mg nutrient uptake by roots of rice plants ranged from 0.02 to 0.23%, while for the top of the rice plants ranged from 0.13 to 0.23%. Mg is absorbed by plants in the form of Mg 2+. The most decisive cation exchange reaction behavior of Mg in the soil. Quick balance between confused with dissolved: Mg Mg in solution supporting mixed up, remember the factors of quantity and intensity of Gardner et. al. (1991). Further explained, that Mg can easily be managed by liming at low pH soil air (with lime dolomite), calcification may cause kekahatan Mg if high levels of Ca (calcite) is used on soils with low Mg levels. Soil with a high K levels led to kekahatan Mg, because it can inhibit the absorption of Mg.3.1.1.6. Nutrient Uptake Fe

 Figure 6. Plot Nutrient Uptake Fe (45 HST)            From the available data, it appears that there is no real influence, between treatment varieties and dolomite-calcification treatment NPK fertilizer. As for Figure 6 can be explained, that is combination treatment V1P3 terrtinggi, while the lowest V1P2.            For Fe uptake by roots of rice plants varies from 0.05 - 0, 08%, whereas Fe uptake by plants ranged from the top of the 0.03 to 0.05%. Fe uptake of nutrients through the leaves is considered faster than the absorption through the roots, especially on plants that are deficient Fe. The function of nutrient Fe is chloroplast protein synthesis and respiration as perikosida enzyme, catalase, prredoksin and cytochrome oxidase. Another function is as an executor Fe electron transfer in metabolic processes. The process is for example the reduction of N2, and sulfate reductase reductase Fe nitrat.Kekurangan nutrients can result in inhibition of the formation of klofil and finally the preparation of the protein to be imperfect as well as the occurrence of chlorosis on the leaves. Iron deficiency can lead to increased levels of the amino acid in the leaves and drastically decrease the number of ribosomes, decreased levels of pigments and proteins as well as a reduction in the activity of all enzymes (Gardner et. Al (1991).3.1.1.7. Sulfur

 Figure 7. Plot Nutrient Uptake Sulfur (45 HST)

             Based on the data, it can be explained that between the two treatments, varieties and dolomite liming-fertilization NPK interaction. While the combination treatment V1P2 highest and lowest V2P1 (Figure 7).             According to Salisbury and Ross (1995) Nutrient Sulfur (S) is required plants in relatively high amounts, less than N or K and similar to P, Ca and Mg. Nutrient uptake by roots barkisar sulfate 0.16 to 0.24%, while the upper part of rice plants ranged from 0.19 to 0.34%. The amount of nutrients absorbed by plants is determined by the amount of nutrients in the soil solution. S element in the soil can be absorbed by plants as SO4

2- soluble soil solution, so the plant roots are able to absorb the S element. The greater efficiency of absorption S, then S is absorbed by plants bigger. So the growth of plants is also good. The more the stems and leaves are produced, so that the weight berangkasan will also increase. S levels in soil are generally about 0.06% contained in the form of sulfate (SO 4

2-), sulfide (S 2-) and organic compounds. S elements absorbed by plants in the form of SO4

2-. This element is highly mobile in soil and no cars inside the plant, so it can not be immediately converted the place of the old leaves to the growing point.3.1.2. Nutrient Uptake In Upper Rice3.1.2.1. Nitrogen

 Figure 8. Plot Nutrient Uptake Nitrogen (45 HST)            Based on the data, it appears that the treatment varieties and dolomite liming-fertilization NPK interaction. While the Figure 8 can be explained, that V2P1 and V3P1 the highest combined treatment and lowest V5P1.            The existence of N in paddy soil greatly affect the vegetative growth of rice crops. It is also explained by Nurmegawati et. al. (2007), that portion of N transported harvest, partly back as crop residues, lost to the atmosphere and back again and lost through leaching. N absorbed by plants in the form of NO3- or NH4 + ion from the ground. Rice plants are able to absorb elements from the soil N sekitas 19-47%. While the absorption of N fertilizer applied to crops is only about 40-50%. N levels on average in the plant tissue is 2-4% dry weight (Mukherjee, 1986). From the research content of N for root uptake tanamanadi at maximum vegetative phase ranged from 1.32 to 2.32%, while for the top crop N uptake ranged from 2.98 to 3.97%. Described by Patti et. al (2013), that an increase in uptake of N the top of the plant when compared to the roots, due to panicle formation which is the end of the vegetative process, so that absorption of N is more to the leaves of plants.3.1.2.2. Phosphorus

 Figure 9. Plot Phosphorus Nutrient Uptake (45 HST)            Based on the data, it can be explained that there is interaction between treatment varieties with dolomite liming-fertilization NPK. From Figure 9, it appears that a combination treatment V2P1 V4P1 highs and lows.            Phosphorus is absorbed in the form of inorganic ions quickly turned into an organic phosphate compound. Phosphorus is easy to move between cars or plant tissue. P nutrient uptake by plant roots can only be through interception and diffusion within a short distance (<0.02 cm), so that the efficiency of fertilizers is generally very low, at around 10%. While most of the fertilizer P that is not absorbed by the plant will not be lost washed, but became stable of P that is not available to plants and subsequently fixed as Al-P and Fe-P in acid soils (pH <5.5) (Pitaloka, 2004 ). Further explained, that the essential function of P in the plant, which is in the process of photosynthesis, respiration, energy transfer and storage, division and cell enlargement. The first signs or symptoms of P deficiency plants, the plants become stunted, leaf shape is not normal and if the acute deficiency, there are parts of leaves, fruit and stems die. Old leaves are affected first when compared with young leaves. DAPT P deficiency also causes delay maturity. Rice plants were grown on soil P deficiency can lead to reduced grain filling.3.1.2.3. Potassium

 Figure 10. Plot Potassium Nutrient Uptake (45 HST)            Judging from the data obtained, it was among the varieties and liming treatment dolomite NPK-fertilizer interaction. While from Figure 10, can be explained that a combination V2P1 highest and lowest V4P1.            Reported, that most Asian soil does not require K as N or P, and that only a slight increase in the results obtained with fertilizer K (Pujiastuti, 2006). According to Marschner (1998) especially for rice plants K serves to: (1) Strengthening straw, (2) Accelerating the process of the formation of proteins, (3) Improving kualias plants, (4) Help translocation of starch, (5) Increase the resistance of plants to pests and disease and (6) Making more pithy grain and lowering the percentage of empty grain. Further explained, that K deficiency will block the process of photosynthesis, metabolism and translocation of carbohydrates from leaves to the grain, dry matter production decreased as a result. Potassium deficiency great cause disease physiology, plant stunting, rods and weak, susceptible to pests and diseases, high grain emptiness.3.1.2.4. Calcium

 Figure 11. Plot Nutrient Absorption Calcium (45 HST)            From the data, that the treatment varieties and dolomite liming-fertilization NPK interaction. As for Figure 11 can be explained, that is combination treatment V2P1 V2P2 highs and lows.           Calcium (Ca) is a macro nutrients that plants need large enough, less than N and K, a similar number to the P, S and Mg. Most Ca is located in the cell wall and membrane wall, the main functions are outside the cytoplasm, its role in the metabolism slightly, into divalent bridge linking between molecules and is reversible. Structural components of cell membranes, maintaining the stability and integrity of cell membranes: regulate ion uptake selectivity, set vermeabilitas membrane and prevent leakage of the solution. Structural components of cell walls, in the form of Ca-pektat in lamela middle between adjacent cell walls serves to strengthen the cell walls and resistance to fungal infections, or located between the cell wall with the plasma membrane, membrane function. Required in elongation and cell division: cell wall and membrane form a cell wall and cell membrane new, this is a regulatory function and structure functions as a reversible bond in the membrane and cell wall allows the cells to grow and develop (Salisbury and Ross, 1995) ,3.1.2.5. Magnesium

 Figure 12. Plot Nutrient Absorption Magnesium (45 HST)            Based on the data, it appears that there is interaction between treatment varieties and dolomite-calcification treatment NPK fertilizer. While from Figure 12, can be explained that a combination treatment V2P1 highest and lowest V1P3.            Magnesium (Mg) is a secondary macro nutrients, plants need relatively large amounts, less than N and K, a similar number with P, S and Ca, Mg generally <Ca. Essential for photosynthesis: be the central atom of the chlorophyll molecule, the numbers 15-20% total Mg in plants. Structural component of the ribosome: protein synthesis. Enzyme activity: the transfer of phosphate and carboxyl groups, namely the reaction of ATP and energy transfer, CO2 fixation RuBP carboxylase (Salisbury and Ross, 1995).3.1.2.6. Fe

 Figure 13. Plot Nutrient Uptake Fe (45 HST)

            Based on the data, it appears that the treatment of variety and dolomite lime-treatment interaction NPK fertilizer. While from Figure 13, can be explained that a combination treatment V5P1 highest and lowest V6P1.           Nutrients iron (Fe) is a micro elements are absorbed by plants in the form of Ferric ion (Fe 3+) or Ferro (Fe 2+). Fe can be absorbed in the form of a chelate (bond metals with organic materials). Fe chelate used is Fe-EDTA, Fe-DTPA and other chelate. Fe in about 80% of plants are found in chloroplasts and sitolasma. The essence of this nutrient is as a prosthetic group of enzymes catalase and peroxidase and as a constituent contained peredoxin role in chlorophyll (Salisbury and Ross, 1995).3.1.2.7. Sulfur

 Figure 14. Plot Nutrient Uptake Sulfur (45 HST)            From the data obtained, it can be explained that there is interaction between treatment varieties and dolomite-calcification treatment NPK fertilizer. While in Figure 14, it appears that the combination treatment V2P1 shows the highest and lowest V3P2.            S element can be lost because of the volatisasi (Dierolf et. Al., 2001). Further explained, that the rice plant to absorb S about 7.2 Kg / ha. It shows that the land is already excess elements of S which can be toxic to available will be transformed into sulfide (H2S). Reduction of Fe3 + to Fe2 + precede SO42-, then Fe will always be found in the soil solution at the time of H2S is formed, so that the H2S is converted into a soluble form FeS. The reaction can protect microorganisms and plants of H2S poisoning. MenurutTisdale et. al. (1990) Sulfur serves as chloroplasts forming a close relationship with photosynthesis and participating in various metabolic reactions, such as the metabolism of carbohydrate, fat and protein, so that when photosynthesis goes well then fotosintat generated too much, fotosintat this will then be accumulated in plant body. Fotosintat seeds in the form of carbohydrates will have to be a rice cooking.3.2. Research In The Field

3.2.1. Nutrient Uptake and Upper Part Roots Rice (45 HST)3.2.1.1. Nitrogen

 Figure 15. Plot Nutrient Uptake Nitrogen (45 HST)            Based on the data obtained, that there is interaction between treatment varieties and dolomite-calcification treatment NPK fertilizer. From Figure 15, it can be explained that a combination treatment V6P3 the highest, while the lowest V1P0.             Nitrogen is the main macro nutrients required all plants in large quantities. N fertilization in rice plants can increase production dikarekan pretumbuhan and can increase the number of tillers and number of grain (Pathak et al, 2006). One of the functions of N in the plant is for the formation of organic molecules in plants, such as amino acids, proteins, enzymes, nucleic acids and chlorophyll (Barus, 2011). So Nitrogen is an element that is essential for the formation of proteins, leaves and various other organic compounds. Nitrogen is absorbed by plants as NO3- and NH4 +, then put in all the amino gas and protein. There is also the principal forms of nitrogen in the soil minerals, organic nitrogen, joined with humus soil, Ammonium Nitrogen can be bound by certain clay minerals and soluble Inorganic Ammonium and nitrate compounds.           Based on the results of soil analysis, that the soil total N content of 1.50% (very high). This is because the high N total soil types used in this study is the acid sulphate soils peaty (Hystic sulfaquents), with a depth of 38 cm peat. According Sariam and Khanif (2006) total N present in the soil, the organic N (NO2 and NH3 +) and inorganic N (NO3- and NH4 +). N fertilization in addition to increase the availability of nutrients N for rice plants as well as to lower the C / N ratio and to speed up the decay of organic material indicates humufikasi process goes quickly and effectively (Dahlan et al, 2008).3.2.1.2..Fosfor

 Figure 16. Plot Phosphorus Nutrient Uptake (45 HST)             From the data, it appears that the treatment varieties and liming treatment NPK-fertilizer happen real influence on dolomite-calcification treatment NPK fertilizer. While in Figure 16, can be explained that a combination treatment V2P4 highest and lowest V2P1.            Plants absorb phosphorus in the form of primary orthophosphate ion (H2SO4-) and orthophosphate ion secondary (HPO42-). In addition, the P element can still be absorbed in another

form, namely forms firofosfat and metaphosphate, there is even a possibility of P absorbed by plants dala form organic compounds that dissolve in water, such as nucleic acids and phitin. Phosphorus is absorbed by plants in the form of inorganic ions quickly turned into an organic phosphorus compound. Phosphorus is easy to move between cars or plant tissue. Optimal levels of phosphorus in the plant during the vegetative growth was 0.3% - 0.5% of the dry weight of the plant. Based on the results of soil analysis, soil P content in 71.95 (very high). The high content of P is suspected because after land clearing, then burned and the land is often intruded at the time of high tide, so that the Na content including very high (2.47 cmol (+) kg-1).            Said Zahra (2010), that will increase plant nutrient uptake in rice varieties with the provision ameliorant materials (lime and fertilizer) dikarekan soil conditions become relatively better and is able to increase nutrient uptake P. Therefore land used is acid sulfate peaty (38 cm), then the P uptake by plants can be inhibited by salicylic acid and ferulic acid (Hartley and Whitehead, 1984 in Zahra, 2010).

3.2.1.3. Potassium

 Figure 17. Plot Potassium Nutrient Uptake (45 HST)            Based on the data obtained, it appears that there is a real effect on the treatment of calcification of dolomite-NPK fertilization, between the varieties and the treatment of dolomite-calcification treatment NPK fertilizer. While in Figure 17, can be explained that a combination treatment V1P3 highest and lowest V2P1.            Potassium (K) is an essential element to three after Nitrogen and Phosphorus. The role of K in the plant as the carrier ion in the translocation of a number of nutrients, especially N, regulate respiration, transpiration, piruvatkinase activation of enzymes involved in the synthesis of carbohydrates, adjust the osmotic pressure. K is a high mobility gives the opportunity to move quickly from one cell to another, or from the old network to the newly formed youth network and storage organs (Zahra, 2010). Based on the results of soil analysis on the variable K is 1:01 cmol (+) kg-1 (high), is thought to be caused by burning of land and forests felled secondary. In addition at least three times a year is experiencing huge tidal land, with a height of 30-50 cm of water from the soil surface for approximately 24 hours with a quality-salty brackish water.3.2.1.4. Calcium

             Figure 18. Plot Calcium Nutrient Uptake            Based on the data obtained, it appears that there is a real effect on the treatment of calcification of dolomite-NPK fertilization, between the varieties and the treatment of dolomite-calcification treatment NPK fertilizer. While from Figure 18, can be explained that a combination treatment V2P4 highest and lowest V1P0. Ca element so no car in the plant, over a limited place of the old leaves to the growing, can cause Ca deficiency at the point of growing roots and stems, Ca kekahatan can occur on land that has a high Ca levels, especially if the rate of low transpirasinya , Symptoms kekahatan growing point growth stunted stems and roots, the leaves on the lower transpirasinya. Land that has a high Ca can inhibit uptake of other nutrients, may also cause kekahatan K and Mg. Calcium (Ca) together with Magnesium (Mg) nutrients commonly referred to as lime. Calcium is important for plants, because calcium is part of all plant cells. Based on the results of soil analysis, the content of Ca = 2.70 cmol (+) kg-1 (low). This is caused by a lack of resources Ca on the ground and most of Ca can be leached from plant litter, others undergo mineralization in the early stages of an overhaul of the material. The presence of Ca minerals in the soil varies greatly. On rough-textured soil Ca levels lower when compared with the betekstur finely ground. Ca levels are also low on the ground that has been weathered Further, the surface of the soil may have lower levels of Ca due to its sour. Most Ca is given into the soil are compounds to neutralize soil acidity, especially CaMgCO3 (Zahra, 2010).3.2.1.5. Magnesium

Figure 19. Plot Nutrient Absorption Magnesium (45 HST)            Based on the data obtained, it can be explained that there was a real influence on dolomite-calcification treatment NPK fertilization, between the varieties and the treatment of dolomite-calcification treatment NPK fertilizer. Based on Figure 19, it appears that a combination treatment V2P4 V2P1 highs and lows.           Magnesium (Mg) is required plants in relatively large amount, less than N and K, a similar number with the P, S and Ca, Mg generally <Ca. Essential for photosynthesis, be the central atom of the chlorophyll molecule, the amount of 15-20% total Mg in plants. Mg levels were higher in soil inhibits the absorption of other cations, for example, resulted kekahatan K or Ca (Zahra, 2010). Mg nutrient content in the soil based on soil analysis results of 0.88 cmol (+) kg-1 (low). The low content of Mg Mg caused by a lack of resources in the soil and the soil immediately leached Mg peaty most of

the litter, the rest suffered mineralization at an early stage overhaul of the residue. Mg derived from limestone used to neutralize the pH of the soil, especially in the form of limestone dolomite (CaMgCO3).            Magnesium (Mg) absorbed by plants in the form of divalent cations Mg 2+. Mg 2+ is supplied by mass flow and interception roots. Mg is absorbed by way of interception roots are much lower when compared to the way the mass flow. Mg can easily be managed with dolomite liming, especially on soils with low pH. Soil with a high K levels led to kekahatan Mg, because it inhibits the absorption of Mg.3.2.1.6. Sulfur

       Figure 20. Nutrient Uptake Sulfur (45 HST)

             From the data obtained, it appears that there is a real effect on the treatment of calcification of dolomite-NPK fertilization, between the varieties and the treatment of dolomite-calcification treatment NPK fertilizer. Based on Figure 20, can be explained that a combination treatment V2P4 V2P1 highs and lows.            Sulfur (S) required by plants in relatively high amounts, less than N or K, similar to P, Ca and Mg, as a constituent of essential amino acids, 90% S in the form of plant proteins, disulfide bonds, the structure of the protein and enzyme activity. The content of H2SO4 based on the results of soil analysis 2.46%. Direct absorption of SO2 by a small number of leaves and roots for uptake mainly in the form of sulfate (SO42-). In the soil sulfate move because of the mass flow and diffusion. Mainly engaged as mass flow, diffusion has significance in soil with low levels of S. Levels in the soil solution 5-20 ppm. Aras is sufficient for the plants 3-5 ppm in the soil (Zahra, 2010).

4. Conclusions4.1. ANOVA results, for variable uptake roots and upper parts of the rice plant, almost all

highly significant, for the treatment of varieties and dolomite-fertilization NPK fertilizer showed significant effect.

4.2. For research in plastic house and in the field, Variety Ringkak Janggut (local) showed the highest uptake when compared with other varieties.

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