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Ketersediaan topsoil sebagai media pembibitan kelapa sawit semakin terbatas sehingga harus diambil dari tempat yang jauh yang memerlukan biaya transport yang mahal dan belum tentu bebas dari Ganoderma. Untuk mengatasi kesulitan tersebut, pekerja yang tidak memiliki pengetahuan yang cukup bisa melakukan tindakan mengambil tanah di perkebunan kelapa sawit yang terinfestasi oleh Ganoderma. Hal itu tentu akan sangat membahayakan karena dapat menularkan Ganoderma melalui medium pertumbuhan bibit. Untuk mengatasi permasalahan tersebut, teknologi pembibitan dengan menggunakan subsoil telah dikembangkan seperti yang dilaporkan pada presentasi terlampir. Subsoil harus dicampur dengan kompos TKKS yang dibuat dengan menggunakan biodekomposer Promi. Biodekomposer Promi mengandung Trichoderma harzianum DT 38 dan T. pseudikoningii DT 39 yang teruji mampu mematikan Ganoderma. Semoga bermanfaat bagi masyarakat perkelapasawitan. DT.
Citation preview
B
ALAIPENELITIA
NBIOTEKNO
LO
GIPERKEBUNA
N
. INDONESIA.
T.W. Darmono 1), A. Purwantara1), H. Widiastuti1),
G. A. Rahim2), D. Asmono2), Mustofa2)
1)Indonesian Biotechnology Research Institute for Estate Crops - Bogor2) PT Sampoerna Agro - Palembang
Keywords: Subsoil, EFB, nursery,
AMF, Ganoderma, Trichoderma.
B
ALAIPENELITIA
NBIOTEKNO
LO
GIPERKEBUNA
N
. INDONESIA.
Demand of oil palm seedlings remains Demand of oil palm seedlings remains
high (at least until today).high (at least until today).
Until recently, media for both preUntil recently, media for both pre-- and and
mainmain--nurseries are composed of nurseries are composed of
mainly top soils.mainly top soils.
Top soils nearby plantation nurseries is Top soils nearby plantation nurseries is
getting limited. Consequently, it needs getting limited. Consequently, it needs
to be collected from a distance to be collected from a distance
location (expensive transportation)location (expensive transportation)
B
ALAIPENELITIA
NBIOTEKNO
LO
GIPERKEBUNA
N
. INDONESIA.
Danger of using near by soils in the Danger of using near by soils in the
plantation infested with plantation infested with GanodermaGanodermaby untrained workers.by untrained workers.
potent disease transmission potent disease transmission
through soil mediumthrough soil medium
X
B
ALAIPENELITIA
NBIOTEKNO
LO
GIPERKEBUNA
N
. INDONESIA.
Provide cheap and healthy Provide cheap and healthy
medium in oil palm seedling medium in oil palm seedling
preparationpreparation
Free of Free of GanodermaGanoderma inoculuminoculum
Contain selected Contain selected TrichodermaTrichoderma
harzianumharzianum DT 38 and DT 38 and T. T.
pseudoconingiipseudoconingii DT39 DT39
antagonistic to antagonistic to GanodermaGanoderma
Contain selected VAM Contain selected VAM
Less inorganic fertilizer useLess inorganic fertilizer use
B
ALAIPENELITIA
NBIOTEKNO
LO
GIPERKEBUNA
N
. INDONESIA.
Make compost from organic materials Make compost from organic materials
available in the plantation (EFB and Fruit available in the plantation (EFB and Fruit
Fiber) using decomposer containing Fiber) using decomposer containing T. T.
harzianumharzianum DT38 and DT38 and T. T. pseudokingiipseudokingii DT DT
39 formulated as 39 formulated as PromiPromiR
B
ALAIPENELITIA
NBIOTEKNO
LO
GIPERKEBUNA
N
. INDONESIA.
Sandwiched “wellSandwiched “well--composted” EFB composted” EFB
containing containing biocontrolbiocontrol agents (1/3 agents (1/3
volume) in between subsoil layers volume) in between subsoil layers
in polybag.in polybag.
Place 50 g of Place 50 g of MycorrhizaeMycorrhizae
in the previously made in the previously made
plant hole in each MN plant hole in each MN
polybag before planting.polybag before planting.
B
ALAIPENELITIA
NBIOTEKNO
LO
GIPERKEBUNA
N
. INDONESIA.
Determine the suitability of sub soil Determine the suitability of sub soil
as medium for oil palm nurseries as medium for oil palm nurseries
after being supplemented with EFB after being supplemented with EFB
compost (prepared as above) and compost (prepared as above) and
enriched with enriched with ArbuscularArbuscular
MycorrhizalMycorrhizal Fungus (AMF)Fungus (AMF)
B
ALAIPENELITIA
NBIOTEKNO
LO
GIPERKEBUNA
N
. INDONESIA.
Materials :Materials :Materials :Materials :
Seedlings of PN (prepared using subsoil medium supplemented with 200 g EFB
compost enriched with 20 g AMF).
Well-Composted EFB containing biocontrol agents Trichoderma harzianum DT38 and
T. pseudokongii DT 39.
Biofertilizer MizaPus
Methodology :Methodology :Methodology :Methodology :
Completely randomized design 3 x 3 x 15.000
Treatments :
K (100% inorganic fertilizer
P1 (50% inorganic fertilizer + 8,5 kg EFB compost)
P2 (50% inorganic fertilizer + 8,5 kg EFB compost) + 50 g Biofertilizer MizaPlus
B
ALAIPENELITIA
NBIOTEKNO
LO
GIPERKEBUNA
N
. INDONESIA.
Seedling height, number of leaf, and stem diameter of oil palm at
the end of the MN stage in response to treatment (Data are average
of three replications of 10 plants each).
1
B
ALAIPENELITIA
NBIOTEKNO
LO
GIPERKEBUNA
N
. INDONESIA.
Seedling fresh weight (left) and dry weight (right) at the end of
MN stage in response to treatment. (Data are average of three
replications and each replication 10 plants).
2
B
ALAIPENELITIA
NBIOTEKNO
LO
GIPERKEBUNA
N
. INDONESIA.
Content of N, P and K of root and N, P and K uptake of oil palm
root at the end of MN stage in response to treatment. (Data are
average of three replications of 10 plants each).
3
B
ALAIPENELITIA
NBIOTEKNO
LO
GIPERKEBUNA
N
. INDONESIA.
P content of leaf P uptake of leaf
P content and P uptake of oil palm seedling at the end of MN stage in
response to treatment. (Data are average of three replications of 10
plants each).
4
B
ALAIPENELITIA
NBIOTEKNO
LO
GIPERKEBUNA
N
. INDONESIA.
Soil chemical properties of oil palm seedlings at the end of MN
stage in response to treatment. (Data are average of three
replications of 10 plants each
5
B
ALAIPENELITIA
NBIOTEKNO
LO
GIPERKEBUNA
N
. INDONESIA.
Addition of wellAddition of well--composted EFB in sub soil medium either composted EFB in sub soil medium either
with or without AMF resulted in better growth performance of with or without AMF resulted in better growth performance of
the seedlings at MN stage than that of subsoil supplemented the seedlings at MN stage than that of subsoil supplemented
with 100% inorganic fertilizer.with 100% inorganic fertilizer.
Nutrient status in all treatments seemed to be insignificantly Nutrient status in all treatments seemed to be insignificantly
different, although there is a tendency that both in root and different, although there is a tendency that both in root and
leaf, the uptake of nutrients was higher in medium treated leaf, the uptake of nutrients was higher in medium treated
with compost alone or compost with AMF.with compost alone or compost with AMF.
50% reduction of inorganic fertilizer in the medium could be 50% reduction of inorganic fertilizer in the medium could be
conducted if subsoil medium is supplemented with EFB conducted if subsoil medium is supplemented with EFB
compost and enriched with AMF).compost and enriched with AMF).
B
ALAIPENELITIA
NBIOTEKNO
LO
GIPERKEBUNA
N
. INDONESIA.
Subsoil medium supplemented with EFB compost containing Subsoil medium supplemented with EFB compost containing
biocontrolbiocontrol agents and enriched with AMF possesses better agents and enriched with AMF possesses better
features than that of subsoil supplemented with inorganic features than that of subsoil supplemented with inorganic
fertilizer due the following reasons:fertilizer due the following reasons:
a). Use less inorganic chemicala). Use less inorganic chemical
b). Contain selected biological control agents suppressive and b). Contain selected biological control agents suppressive and
antagonistic to antagonistic to GanodermaGanoderma..
c). Free of c). Free of GanodermaGanoderma infestation.infestation.
d). Less expensive than that of if top soil were used.d). Less expensive than that of if top soil were used.
