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Journal of Applied Sciences
  Year: 2008 | Volume: 8 | Issue: 18 | Page No.: 3261-3266
DOI: 10.3923/jas.2008.3261.3266
 
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Recovery of 15N Derived from Rice Residues and Inorganic Fertilizers Incorporated in Soil Cultivated with Japanese and Egyptian Rice Cultivars

A. Ebid, H. Ueno, A. Ghoneim and N. Asagi

Abstract:
The effect of a combination of inorganic fertilizer and organic inputs on nitrogen uptake and utilization efficiency was compared with that of only inorganic fertilizer. The treatments involved the addition of equivalent amounts of N (80 kg N ha-1) through inorganic fertilizer or three organic inputs (rice straw, rice root, or rice hull), in addition to a control treatment for rice (Oryza sativa L.) cultivars Koshihikari and Sakha 102. Rice straw was applied at two rates that corresponded to 5 and 10 Mg ha-1, the application rate of rice hull was 5 Mg ha-1 and rice root was 2.5 Mg ha-1. The rates of N utilization efficiency after 100th days after transplanting with 5 Mg ha-1 rice straw were relatively higher and ranged from 18.5 to 20.5%, while that with 10 Mg ha-1 ranged from 14.6 to 15.6%. The results show that a combination of inorganic fertilizers and rice straw enhanced N utilization efficiency. It is suggested that rice straw integrated with 40 kg N ha-1 of inorganic fertilizers and applied at a suitable time had a positive effect on N uptake derived from rice straw, whereas higher rates of rice straw application had an adverse affect on N uptake by the rice crop.
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How to cite this article:

A. Ebid, H. Ueno, A. Ghoneim and N. Asagi, 2008. Recovery of 15N Derived from Rice Residues and Inorganic Fertilizers Incorporated in Soil Cultivated with Japanese and Egyptian Rice Cultivars. Journal of Applied Sciences, 8: 3261-3266.

DOI: 10.3923/jas.2008.3261.3266

URL: https://scialert.net/abstract/?doi=jas.2008.3261.3266

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