Soil fertility in flooded and non-flooded irrigated rice systems

Sahrawat, K L (2012) Soil fertility in flooded and non-flooded irrigated rice systems. Archives of Agronomy and Soil Science, 58 (4). pp. 423-436. ISSN 0365-0340

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Abstract

The lowland rice system in Asia makes a major contribution to the global rice supply and is often cited as an example of a sustainable system in which two or three crops of rice are grown in sequence under submerged conditions. However, water shortages are becoming critical in some regions for lowland rice cultivation; and there is high potential in exploring rice cultivation under moisture regimes that save water and also increase productivity. The objective of this article therefore is to analyze the consequences of switching growing of rice from flooded to aerobic conditions on soil fertility and its management. Fertility advantages of submerged rice include amelioration of chemical fertility, preferential accumulation of organic matter and improved availability of major, secondary and selected micronutrients, which contribute to the long-term maintenance of soil fertility and sustainability of the lowland rice system. However, the fertility problems under aerobic rice are better addressed with the crop as a component of a cropping system because continuous growing of aerobic rice in sequence does not seem sustainable due to complex, site-specific chemical and biological constraints.

Item Type:	Article
Divisions:	UNSPECIFIED
CRP:	UNSPECIFIED
Uncontrolled Keywords:	aerobic rice; chemical and biological fertility; flooded soil, nutrient availability; paddy rice; soil health; sustainability
Subjects:	Others > Soil Science
Depositing User:	Mr Siva Shankar
Date Deposited:	15 Mar 2012 06:35
Last Modified:	15 Mar 2012 06:37
URI:	http://oar.icrisat.org/id/eprint/5717
Official URL:	http://dx.doi.org/10.1080/03650340.2010.522993
Projects:	UNSPECIFIED
Funders:	UNSPECIFIED
Acknowledgement:	UNSPECIFIED
Links:	Author

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