Hostname: page-component-77f85d65b8-5ngxj Total loading time: 0 Render date: 2026-04-19T05:54:49.454Z Has data issue: false hasContentIssue false

SOIL AGGREGATION AND ORGANIC CARBON AS AFFECTED BY DIFFERENT IRRIGATION AND NITROGEN LEVELS IN THE MAIZE–WHEAT CROPPING SYSTEM

Published online by Cambridge University Press:  09 September 2013

SANGEETA LENKA*
Affiliation:
Water Technology Centre, Indian Agricultural Research Institute, Pusa, New Delhi 110012, India Department of Soil Physics, Indian Institute of Soil Science, Nabibagh, Berasia Road, Bhopal 462038, Madhya Pradesh, India
A. K. SINGH
Affiliation:
Water Technology Centre, Indian Agricultural Research Institute, Pusa, New Delhi 110012, India Rajmata Vijayaraje Scindia Krishi Viswa Vidyalaya, Gwalior, Madhya Pradesh, India
N. K. LENKA
Affiliation:
Water Technology Centre, Indian Agricultural Research Institute, Pusa, New Delhi 110012, India Division of Soil Chemistry, Indian Institute of Soil Science, Nabibagh, Berasia Road, Bhopal 462038, Madhya Pradesh, India
*
§Corresponding author. Email: sangeeta_2@rediffmail.com

Summary

Best management practices in agriculture have the potential to sequester carbon and improve soil aggregation. Hence, in the present investigation, different levels of irrigation and nitrogen (inorganic and organic) were used in the maize–wheat cropping system to study their effect on soil organic carbon (SOC) accumulation and aggregation. The treatments consisted of three levels of water regimes (namely W1, W2 and W3 referring to limited, medium and maximum irrigation) and five nitrogen levels (T1, 0% N; T2, 75% N; T3, 100% N; T4, 150% N; T5, 100% N from organic source), with three replications taken in a split plot design. Positive and significant correlation between SOC and mean weight diameter (MWD) was observed, implying that increasing SOC improved soil structure and increased the MWD. The quantification of water and nitrogen interaction on SOC was done by developing a multiple regression equation, which, when validated with SOC of the subsequent year, resulted in significant correlation. Irrigation and N was found to have a significant effect on soil aggregation and organic carbon build-up. Two N treatments (T4: 150% N and T5: 100% N from organic source) improved soil aggregation (macro-aggregates) and SOC when accompanied with W3 water regime (maximum amount of irrigation). Across N treatments, the W3 regime registered significantly higher SOC by more than 30% over control in the 0–15-cm soil depth.

Information

Type
Research Article
Copyright
Copyright © Cambridge University Press 2013 

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

Article purchase

Temporarily unavailable