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Mineralization of soil organic nitrogen under waterlogged conditions in relation to other properties of tropical rice soils

OAR@ICRISAT

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Relation http://oar.icrisat.org/4573/
http://dx.doi.org/10.1071/SR9830133
 
Title Mineralization of soil organic nitrogen under waterlogged conditions in relation to other properties of tropical rice soils
 
Creator Sahrawat, K L
 
Subject Soil Science
Fertilizer Appications
 
Description The mineralizable nitrogen pool in wetland rice soils plays a dominant role in the nitrogen nutrition of rice even in fertilized paddies. There is a lack of information on how different soil properties affect ammonification of organic nitrogen in wetland rice soils. Surface samples of 39 diverse Philippine soils representing a wide range of pH, organic matter and texture were studied to determine the relationships between ammonification of organic nitrogen and soil properties. Simple correlation analysis showed that ammonium production was correlated highly significantly with total nitrogen (r = 0.94**), organic carbon (r = 0.91**) and C/N ratio (r = -0.46**), but it was not significantly correlated with cation exchange capacity, clay or pH. Multiple regression analayses showed that organic matter (organic carbon and total nitrogen) accounted for most of the variation in mineralizable nitrogen. These results suggest that organic carbon content is a good index of mineralizable nitrogen in tropical wetland rice soils.
 
Publisher CSIRO Publishing
 
Date 1983
 
Type Article
PeerReviewed
 
Format application/pdf
 
Language en
 
Rights —
 
Identifier http://oar.icrisat.org/4573/1/Aus_Jo_Soil_Res_21_2_133-138_1983.pdf
Sahrawat, K L (1983) Mineralization of soil organic nitrogen under waterlogged conditions in relation to other properties of tropical rice soils. Australian Journal of Soil Research, 21 (2). pp. 133-138. ISSN 0004-9573