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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
agricultural and biological sciences
Effects of carbon input on soil carbon stability and nitrogen dynamics
Agriculture, Ecosystems and Environment, Volume 189, Year 2014
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Description
Improved understanding of the process of carbon (C) stabilization is critical to managing emissions from agricultural 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 locations in India (Jabalpur-Vertisol, Palampur-Alfisol and Ranchi-Alfisol). We measured soil organic C (SOC), C pools and stocks in the treatments of no fertilization as control, inorganic fertilization as NPK and integrated fertilization as NPK+farm yard manure (FYM). Quantification of different SOC pools was done by a procedure of acid hydrolysis followed by a long-term (247 days) incubation study. Based on crop yield and 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 FYM in addition to NPK enhanced the acid non-hydrolysable fraction of SOC across sites. Stability of SOC significantly influenced N dynamics in soil and the availability of N in soil is correlated with the amount of C in the acid-hydrolysable pool (R2=0.64, p=0.01) but not with SOC (R2=0.12, p=0.01). Long-term use of chemical fertilizers did not significantly affect soil total N content. © 2014 Elsevier B.V.
Authors & Co-Authors
Jha, Pramod
India, Bhopal
Icar - Indian Institute of Soil Science, Bhopal
Biswas, Ashish Kumar M.Abdul Ahad
India, Bhopal
Icar - Indian Institute of Soil Science, Bhopal
Lal, Rattan A.
United States, Columbus
The Ohio State University
Singh, Muneshwar V.
India, Bhopal
Icar - Indian Institute of Soil Science, Bhopal
Statistics
Citations: 26
Authors: 4
Affiliations: 3
Identifiers
Doi:
10.1016/j.agee.2014.03.019
ISSN:
01678809
Research Areas
Environmental
Study Approach
Quantitative