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Depth dynamics of soil N contents and natural abundances of 15N after 43 years of long-term fertilization and liming in sub-tropical Alfisol

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Title Depth dynamics of soil N contents and natural abundances of 15N after 43 years of long-term fertilization and liming in sub-tropical Alfisol
Not Available
 
Creator Ghosh, A., Bhattacharyya, R., Dwivedi, B.S., Biswas, D.R., Meena, M.C., Sarkar, A., Agarwal, B.K., Mahapatra, P., Shahi, D.K., Agnihotri, R. and Salwani, R
 
Subject Wheat based cropping, farmyard manure, C/N ratio, deep soil N accumulation, δ15N,
 
Description Not Available
The aim of this study was to understand impacts of long-term (43 years) fertilization on soil aggregation, N accumulation rates and δ15N in surface and deep layers in an Alfisol. Soil samples from seven treatments were analysed for N stocks, aggregate-associated N in 0–30 cm and the changes in δ15N in 0–90 cm depths. The treatments were: unfertilized control (control); recommended N dose (N); recommended N and phosphorus doses (NP); recommended N, P and potassium doses (NPK); 150% of recommended N, P and K doses (150% NPK); NPK + 10 Mg FYM ha−1 (NPK + FYM) and NPK + 0.4 Mg lime ha−1 (NPK + L). Results revealed that plots under NPK + FYM had ~39% higher total N concentrations than NPK + L in 0–30 cm soil layers. In NPK + L, macro-aggregates had 35 and 11% and microaggregates had 20 and 9% lower δ15N values than NPK + FYM in 0–15 and 15–30 cm soil layers, respectively. However, plots receiving NPK + FYM had ~39% greater deep soil (30–90 cm) N accumulation than NPK + L. These results would help understanding N supplying capacity by long-term fertilization and assist devising N management strategies in sub-tropical acidic Alfisols.
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Date 2018-11-19T10:43:01Z
2018-11-19T10:43:01Z
2018-02
 
Type Research Paper
 
Identifier Ghosh, A., Bhattacharyya, R., Dwivedi, B.S., Biswas, D.R., Meena, M.C., Sarkar, A., Agarwal, B.K., Mahapatra, P., Shahi, D.K., Agnihotri, R. and Salwani, R. 2018. Depth dynamics of soil N contents and natural abundances of 15N after 43 years of long-term fertilization and liming in sub-tropical Alfisol. Archives of Agronomy and Soil Science.
1476-3567
http://krishi.icar.gov.in/jspui/handle/123456789/12104
 
Language English
 
Relation Not Available;
 
Publisher Taylor & Francis