Carbon and nutrient dynamics under long-term nutrient management in tropical rice-wheat-jute system
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Title |
Carbon and nutrient dynamics under long-term nutrient management in tropical rice-wheat-jute system
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Creator |
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Subject |
Long-term experiment; carbon pools; carbon management index; nutrient availability; rice based system
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Description |
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Impacts of 43-year nutrient management on carbon (C) and nutrient dynamics were studied in a rice-wheat-jute system in tropical India. Carbon dynamics was investigated on the basis of its distribution of labile (microbial biomass C, permanganate oxidizable C and water soluble C) and slow pools (Walkley Black oxidizable organic C), its indices (C pool index, lability index) and C management index (CMI) at different soil depths. Nutrient dynamics was judged by major nutrients availability, and related soil enzymatic activities. We studied seven treatments including unfertilized control, 100% NPK (N:P2O5:K2O 60:30:60), 50% NPK, 150% NPK, 100% NP, 100% N, 100% NPK + farm yard manure (10 tonnes FYM ha−1). Nutrients availability and soil enzymatic activities were significantly increased under balanced fertilization (100% NPK + FYM) over other treatments. Labile, slow and total C was also found highest in 100% NPK + FYM. Enhanced C indices under 100% NPK + FYM over 100% NPK and other treatments signified the importance of long term balanced fertilization on soil C stabilization. Lability indexes were lower at sub-soil (30-45cm). In terms of favourable nutrient dynamics and CMI, balanced application of NPK plus organics were recommend for long term sustainability of rice-wheat-jute system in tropics. Not Available |
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Date |
2020-08-01T02:45:20Z
2020-08-01T02:45:20Z 1001-01-01 |
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Type |
Research Paper
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Identifier |
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Not Available http://krishi.icar.gov.in/jspui/handle/123456789/38744 |
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Language |
English
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Relation |
Not Available;
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Publisher |
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