Fertilizer Management for Rice in Ganges Tidal Coastal Zone

Welcome to

Presentation

Bangladesh Rice Research Institute


Fertilizer Management for Rice in Ganges Tidal Coastal Zone

Dr. Pranesh Kumar Saha, Chief Scientific Officer, Soil Science Division, BRRI

Md. Nazrul Islam Scientific Officer, Soil Science Division, BRRI

Md. Imran Ullah Sarkar Scientific Officer, Soil Science Division, BRRI

Introduction


The coastal area covers about 20% of Bangladesh and

over thirty percent of the net cultivable area. It extends

inside up to 150 km from the coast.

Out of 2.85 million hectares of the coastal and offshore

areas about 0.83 million hectares are arable lands, which

cover over 30% of the total cultivable lands of Bangladesh.

Cont’d


The dominant rice crop in the coastal area is the local T.

Aman rice.

Rice is the predominant crop in Bangladesh but saline

tolerant modern rice cultivars are few in number.

The people of that area have been cultivating saline

tolerant local rice varieties for more than 100 years only

in T. Aman season.

Cont’d.


The yield potential of those traditional varieties are low

(2.0-2.5 t/ha/year).

The need of the hour is to achieve substantially higher

crop yield than the present yield levels from our limited

land resources on a sustainable basis.

Contd.


A crop production system with high yield targets

cannot be sustainable unless nutrient inputs to soil

are at least balanced against nutrient removal by

crops.

Proper soil fertility management, therefore, is one of

the prime importance in an endeavor to increase crop

productivity.

Objectives:


To increase the productivity of MV rice through

integrated fertilizer management

To increase the awareness about BRRI soil

management technologies among farmers

Methodology:


The following treatments were Included in this study. The

experiments were set up with non replicated. The unit plot

size is 8m x 6m.

2012-13 2013-14

T1: BRRI recommended dose

T2: IPNS + Rice Straw (4.5 t/ha,

Sun dry basis)

T3: Farmers' Practice

T1: BRRI recommended dose

T2: IPNS + Cow dung (3 t/ha,

Oven dry basis)

T3: Farmers' Practice

Location:


Village Upozila District

Lakhmipasha and Dudhalmou Bakergonj

Barisal Shibpasha Barisal sadar

Mothershi, South Morakathi Ujirpur

Chouddoburia Nalchity Jhalkathi

Agoilpasha, Khadoikhira and Rupsia Jhalkathi sadar

Naldoani, Kartikpasha, South

Pangashia and North Pangashia Dumki

Patuakhali

West Sarikkhali Patuakhali sadar

Ghatkhali Amtoli Barguna

Initial soil characteristics of experimental plot


Characteristics Ujirpur Amtoli Jhalkathi

sadar Nalchiti

pH 6.0-7.2 6.3-7.5 5.5-6.8 5.4-7.0

OM (%) 1.23-2.10 1.20-2.30 1.30-1.70 1.42-2.16

Total N (%) 0.13-0.20 0.10-0.12 0.13-0.15 0.09-0.15

Available P (mg/kg) 7-16 4-14 8-14 10-18

Available K (Cmol/kg) 0.20-0.24 0.20-0.27 0.16-0.22 0.18-0.23

Available S (mg/kg) 19-28 35-44 22-36 26-37

Available Zn (mg/kg) 0.8-1.6 0.7-1.8 1.3-2.0 1.0-2.3


Characteristics Bakergonj Dumki Barisal sadar

pH 5.6-6.0 6.5-7.4 6.2-6.7 OM (%) 1.72-2.19 1.50-1.70 1.13-1.89 Total N (%) 0.09-0.11 0.09-0.12 0.10-0.19

Available P (mg/kg) 12-19 9-14 8-17

Available K (Cmol/kg) 0.21-0.26 0.23-0.25 0.17-0.23

Available S (mg/kg) 24-40 20-34 23-35

Available Zn (mg/kg) 1.8-2.2 0.8-2.4 0.6-1.5

Cont’d

Treatment details of the experiment, 2012-2013


1T1 & T2 – N was applied from the source of urea super granule (USG) and T3- from the source of

pilled urea (PU) 2IPNS was followed in all elements (P, K, S and Zn) except N due to the application of USG

Treatments T. Aus N1 P K S Zn

kg/ha T1: BRRI recommended dose (AEZ basis) 50 11 15 3 1 T2: Rice Straw (4.5 t/ha, sun dry basis)+ IPNS basis chemical fertilizer2

50 7 0 0 1

T3: Farmers' Practice (FP) 37 15 10 0 0

Cont’d




Treatments T. Aman N1 P K S Zn


50 11 0 0 1.8



Contd.



Treatments Boro N1 P K S Zn


75 25 0 1.5 2.5


Treatment details of the experiment, 2013-2014




Treatments T. Aus N1 P K S Zn

kg/ha T1: BRRI recommended dose (AEZ basis) 50 11 15 3 1 T2: Cowdung (3 t/ha, oven dry basis)+ IPNS basis chemical fertilizer2

50 0 0 0 0.7


Cont’d




Treatments T. Aman N1 P K S Zn


50 0 0 0 1.7


Contd.




Treatments Boro N1 P K S Zn


75 6 0 0 2.7


Chemical composition of rice straw and cowdung


Organic matter N (%) P (%) K (%) S (%) Zn (%)

Rice straw 0.5 0.08 1.6 0.09 0.01

Cowdung 1.2 0.8 1.3 0.13 0.01

Source: Saha et al. (2004)


Results and Discussions

Grain and straw yield (t/ha) of T. Aus Rice (BRRI dhan27), T.

Aman (BRRI dhan49) and Boro (BRRI dhan29 & BRRI

dhan47), 2012-13


Parameters Treatment T. Aus, 2012 (n=6)

T. Aman, 2012 (n=9)

Boro, 2012-13 (n=4)

Mean ± SD Mean ± SD Mean ± SD Grain yield (t/ha)

T1 (BRRI dose) 3.99 ± 0.45 3.66 ± 0.75 6.90 ± 0.96 T2 (Rice straw + IPNS) 4.38 ± 0.68 4.01 ± 0.72 7.52 ± 0.57 T3 (Farmer’s practice) 3.46 ± 0.47 3.37 ± 0.66 6.28 ± 0.74

Straw yield (t/ha)

T1 (BRRI dose) 3.84 ± 0.25 3.32 ± 0.49 5.62 ± 1.04 T2 (Rice straw + IPNS) 4.41 ± 0.44 4.05 ± 0.90 5.58 ± 1.28 T3 (Farmer’s practice) 3.32 ± 0.51 3.09 ± 0.40 4.78 ± 0.79

Grain and straw yield (t/ha) of T. Aus Rice (BRRI dhan27), T.

Aman (BRRI dhan54) and Boro (BRRI dhan47), 2013-14


Parameters Treatment T. Aus, 2013 (n=6)

T. Aman, 2013 (n=7)

Boro, 2013-14 (n=5)

Mean ± SD Mean ± SD Mean ± SD Grain yield (t/ha)

T1 (BRRI dose) 3.87±0.34 3.86±0.23 6.70±0.56 T2 (Cowdung + IPNS) 4.04±0.46 3.99±0.45 6.91±0.60 T3 (Farmers’ practice) 3.49±0.42 3.62±0.29 6.23±0.54

Straw yield (t/ha)

T1 (BRRI dose) 7.21±0.77 4.50±0.96 7.21±0.32 T2 (Cowdung + IPNS) 7.43±1.21 4.32±0.62 7.50±0.23 T3 (Farmers’ practice) 5.83±0.95 4.02±0.82 6.66±0.22

Conclusion


Rice straw/cowdung with IPNS basis chemical fertilizer

performed best to get a maximum yield.

Rice straw applied with IPNS based chemical fertilizer gave

20-27% higher yield over FP and it saved full dose of K and S

and partially P fertilizer in all season.

Cowdung gave 10-16% higher yield over FP and it saved full

dose of P, K and S fertilizer in T. Aus and T. Aman season but

in Boro season an additional little dose of P fertilizer was

needed.

On the other hand, BRRI recommended dose (only chemical

fertilizer) gave 6-15% higher yield over FP.

Organic manure can save foreign currency, spend to import

chemical fertilizer.

Thank You


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Fertilizer Management for Rice in Ganges Tidal Coastal Zone