1. Green Manure as a component of Nutrient Management (INM)
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2. Green manure as a component of INM
Introduction
Green manuring crop such as Dhaincha (Sesbania spp.) sunhemp (Crotalaria juncea), etc. can be grown before the rice season.
These crops provide sufficient quantity of nitrogen. Green manure helps in increasing apparent use efficiency of K when combined with 50% of the recommended doze of NPK.
It also has residual effect on the next crop and minimize the adverse effects of AI3+ and /or Fe 2+ in acidic lateritic soils through the chelation of these ions by organic molecules liberated from FYM in the course of mineralization.
They provide sufficient quantity of organic matter which in turn helps in development of good soil structure.
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3. Green manure as a component of INM
Green manure improves nutrient use efficiency in various ways :
Green manuring through Sesbania aculeata is equivalent to 60 kg inorganic N/ha.
Incorporation of mungbean after picking pods results in savings
of 60 kg inorganic N/ha for the rice crop
Alley cropping to Leucaena leucocephala, Gliricidia sepium and Acacia mangium can provide kg N/ha per year
Pruning of Sesbania rostrata planted as hedgerows provides 3-4 t/ha dry matter after decomposition, it releases an average of 70 kg N/ha
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4. Green manure as a component of INM
Besides above, green manure helps in
Increasing apparent use efficiency of K when combined with 50% of the recommended NPK.
Having residual effect on the next crop.
Minimizing the adverse effects of AI3+ and /or Fe 2+ in acidic lateritic soils through the chelation of these ions by organic molecules liberated from FYM in the course of mineralization.
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5. Green manure as a component of INM
Use of green manure in crop rotation before transplanting rice.
Supplements about 50% of the total N requirement of rice
Provides about % of the crop’s requirement in the case of rain fed lowlands when the requirement for N is relatively low (60-80 kg N/ha).
Has a mobilizing effect on PK and micronutrients in the soil.
Reduces the leaching and gaseous losses of N, thus increasing the efficiency of applied plant nutrients.
Can skip the P allocation to rice when 30 kg P2O5/ha is applied to the green manure crop.
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6. Green manure as a component of INM
* Provides kg N/ha
* Improves the soil organic matter.
* Improves physico-chemical and biological condition of the soil
It is quite interesting
that incorporation of
crop residues before
rice
Inclusion of grain/fodder/legume crops in crop rotation helps in :
Contributing as much as kg N/ha to the succeeding crop of rice
Contributing about 60 kg N/ha when whole plant of mungbean is incorporated into the soil after picking the pods in the summer season
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7. Green manure as a component of INM
Grow green manuring crops such as Dhaincha (Sesbania spp.) sunhemp (Crotalaria juncea), etc.,before the rice season.
Green Manure crop Acacia mangium and Sesbania rostrata as hedgerows in alley.
Before transplanting the rice crop, incorporate whole plants of leguminous crop grown in summer (such as greengram, blackgram and cowpea) after picking the pods.
Green Manure crop
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8. Green manure as a component of INM
How INM brings happiness?
INM brings happiness to the farmers by producing high yield and keeping soil in good health condition.
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