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Amide nitrogen transformation in waterlogged soil

Published online by Cambridge University Press:  27 March 2009

H. M. Abdel Magid  and
M. A. Tabatabai
H. M. Abdel Magid
Affiliation:
Department of Soil and Water, College of Agriculture and Veterinary Medicine, King Saud University Branch, El Gassim, Buraydah, P.O. Box 1482, Saudi Arabia
M. A. Tabatabai
Affiliation:
Department of Agronomy, Iowa State University, Ames, Iowa 5001, USA
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Summary

In laboratory studies, the amount of N mineralized under waterlogged conditions during 14 days at 30°C was significantly correlated (P < 0·001) with the activities of amidase, glutaminase and asparaginase in soil when these enzymes were assayed by either a nonbuffer or a buffer method using appropriate substrates. N mineralization under waterlogged conditions was also significantly positively correlated with N mineralization under aerobic conditions, especially at 25 and 35 °C (P < 0·001). Generally, the results indicate that the use of amidase, glutaminase and asparaginase activities in predicting plant-available N in soils deserves more attention.

Type
Crops and Soils
Information
The Journal of Agricultural Science , Volume 116 , Issue 2 , April 1991 , pp. 281 - 285
Copyright
Copyright © Cambridge University Press 1991

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