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Effects of carbon input on soil carbon stability and nitrogen dynamics

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Title Effects of carbon input on soil carbon stability and nitrogen dynamics
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Creator Jha Pramod, Lakaria Brij Lal, Biswas, A. K., Saha, R., Mahapatra, P., Agrawal, B. K., Sahi, D. K., Wanjari, R. H., Lal, R., Singh Muneshwar and Subba Rao, A.
 
Subject soil carbon stability, nitrogen dynamics, indian soils
 
Description Not Available
tImproved understanding of the process of carbon (C) stabilization is critical to managing emissions fromagricultural soils and optimizing crop yield. We assessed soil organic C (SOC) stability and nitrogen (N)dynamics in a long-term fertilization experiment (started in 1972) conducted at three different locationsin India (Jabalpur-Vertisol, Palampur-Alfisol and Ranchi-Alfisol). We measured soil organic C (SOC), Cpools and stocks in the treatments of no fertilization as control, inorganic fertilization as NPK and inte-grated fertilization as NPK + farm yard manure (FYM). Quantification of different SOC pools was done bya procedure of acid hydrolysis followed by a long-term (247 days) incubation study. Based on crop yieldand C storage, NPK + FYM was the best treatment for improving crop productivity and SOC sequestration.Integrated fertilization for 38 years increased SOC across sites. In the NPK treatment, additional C input(3–9 times higher) in the form of root biomass did not significantly change C pools. Application of FYMin addition to NPK enhanced the acid non-hydrolysable fraction of SOC across sites. Stability of SOC sig-nificantly influenced N dynamics in soil and the availability of N in soil is correlated with the amount ofC in the acid-hydrolysable pool (R2= 0.64, p = 0.01) but not with SOC (R2= 0.12, p = 0.01). Long-term useof chemical fertilizers did not significantly affect soil total N content.
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Date 2021-08-23T06:57:56Z
2021-08-23T06:57:56Z
2014-01-01
 
Type Journal
 
Identifier Not Available
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http://krishi.icar.gov.in/jspui/handle/123456789/59137
 
Language English
 
Relation Not Available;
 
Publisher Elsevier Publication