Depth dynamics of soil N contents and natural abundances of 15N after 43 years of long-term fertilization and liming in sub-tropical Alfisol
KRISHI: Publication and Data Inventory Repository
View Archive InfoField | Value | |
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. Not Available |
|
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
|
|