Fertilizer induced nitrous oxide emissions from Vertisols and Alfisols during sweet sorghum cultivation in the Indian semi-arid tropics

Ramu, Karri and Watanabe, T and Uchino, H and Sahrawat, K L and Wani, S P and Ito, O (2012) Fertilizer induced nitrous oxide emissions from Vertisols and Alfisols during sweet sorghum cultivation in the Indian semi-arid tropics. Science of the Total Environment, 438. pp. 9-14. ISSN 0048-9697

PDF (Author's Copy) - Published Version Restricted to ICRISAT users only Download (830kB) | Request a copy

Abstract

Nitrous oxide (N2O) emissions from Vertisols and Alfisols during sweet sorghum cultivation in the Indian semi-arid tropics were determined using a closed chamber technique during the rainy season (June–October) of 2010. The study included two treatments, nitrogen (N) at a rate of 90 kg/ha and a control without N fertilizer application. The N2O emissions strongly coincided with N fertilization and rainfall events. The cumulative N2O–N emission from Alfisols was 1.81 N2O–N kg/ha for 90 N treatment and 0.15 N2O–N kg/ha for the 0 N treatment. Similarly, the N2O–N emission from Vertisols was 0.70 N2O–N kg/ha for 90 N treatment and 0.09 N2O–N kg/ha for the 0 N treatment. The mean N2O–N emission factor for fertilizer induced emissions from the Alfisols was 0.90% as compared to 0.32% for Vertisols. Our results suggest that the N2O emissions are dependent on the soil properties. Therefore, the monitoring of N2O emissions from different agro-ecological regions, having different soil types, rainfall characteristics, cropping systems and crop management practices are necessary to develop comprehensive and accurate green house gas inventories.

Item Type:	Article
Divisions:	UNSPECIFIED
CRP:	UNSPECIFIED
Uncontrolled Keywords:	Nitrous oxide; Sweet sorghum; Vertisols; Alfisols; Semi-arid
Subjects:	Mandate crops > Sorghum Others > Soil Science Others > Fertilizer Applications
Depositing User:	Mr Sanat Kumar Behera
Date Deposited:	13 Sep 2012 05:28
Last Modified:	13 Sep 2012 05:28
URI:	http://oar.icrisat.org/id/eprint/6128
Official URL:	http://dx.doi.org/10.1016/j.scitotenv.2012.08.005
Projects:	Development of sustainable soil fertility management for sorghumand sweet sorghumthrough effective use of biological nitrification inhibition (BNI)
Funders:	Government of Japan-Ministry of Agriculture, Forestry and Fisheries
Acknowledgement:	This studywas a part of a research project “Development of sustainable soil fertility management for sorghumand sweet sorghumthrough effective use of biological nitrification inhibition (BNI)” funded by grants from the Ministry of Agriculture, Forestry and Fisheries, Japan. The authors would like to thank Dr. Shigeto Sudo of the National Institute for Agro-Environmental Sciences, Japan for giving valuable suggestions and providing N2O gas standards.
Links:	Author

View Statistics

Actions (login required)

View Item