Nitrogen mineralization in a Vertisol from organic manures, green manures and crop residues in relation to their quality
KRISHI: Publication and Data Inventory Repository
View Archive InfoField | Value | |
Title |
Nitrogen mineralization in a Vertisol from organic manures, green manures and crop residues in relation to their quality
Not Available |
|
Creator |
8. Sammi Reddy, K., Mohanty, M., Rao, D.L.N., Singh, M., Dalal, R.C., Suuba Rao, A, Pandey, M. and Menzies, N.
|
|
Subject |
Nitrogen mineralization, organic manures, green manures, crop residues vertisol,
|
|
Description |
Not Available
The nitrogen (N) mineralization characteristics of organic manures, green manures and crop residues in relation to their quality were investigated in a Vertisol. The proportion of N mineralized from different organic materials ranged from -28% in wheat straw to 95% in gliricidia. The N release from good quality materials (green manures & poultry manure) having C:N ratio of 12 to 14:1 was fast. Whereas the organic materials (farmyard manure, soybean and chickpea straw) with intermediate quality having C:N ratio of 29 to 33:1 resulted in immobilization of N during the first 6 weeks of incubation and subsequent release of mineral N from 8 to 16 weeks of incubation. Addition of urea with these materials to raise the N content of the materials to 2%, and narrow the C:N ratio to 18 to 22:1, resulted in net mineralization of N from the first week onwards. Addition of poor quality wheat straw with a C:N ratio of 79:1 resulted in a marked decrease in mineral N, due to immobilization of N, throughout the incubation period. Addition of urea N to bring down the C:N ratio to 22 helped in faster mineralization of N from the wheat straw + urea mixture. Correlations between quality parameters of the organic materials and the proportion of N mineralized at 4, 8, 12 and 16 weeks after incubation showed that N mineralization was strongly influenced by N content and C:N ratio of the organic materials. In contrast, lignin and polyphenol contents had no effect on mineralization, but ratios of lignin/polyphenol, polyphenol/N, and lignin+polyphenol/N had significant negative relationships with N mineralization Not Available |
|
Date |
2021-08-25T04:31:51Z
2021-08-25T04:31:51Z 2008-06-01 |
|
Type |
Research Paper
|
|
Identifier |
Not Available
Not Available http://krishi.icar.gov.in/jspui/handle/123456789/60393 |
|
Language |
English
|
|
Relation |
Not Available;
|
|
Publisher |
Not Available
|
|