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International Journal of Agricultural Research

Year: 2007  |  Volume: 2  |  Issue: 12  |  Page No.: 1030 - 1036

Impact of Rice Residues Application on Rice Growth, Yield and Some Paddy Soil Properties

Azza Ebid, Hideto Ueno and Adel Ghoneim

Abstract

To study the short term effects of rice residue management in comparison with mineral fertilizer on rice growth, yield, N uptake, changes of ammonia concentration, pH and EC of flooded water. Biomass yield was significantly higher in the mineral fertilizer and rice residue than in the control treatment. Total N uptake by rice was not significantly affected by rice residue incorporation. A lower N uptake in the rice residue plots can be attributed to relatively high C/N ratios. The result suggests that the application of rice residue at a suitable time is crucial for maximizing the beneficial effects of rice residue application. In particular, the increased immobilization process in early stages and the subsequent gradual remineralization allowed plant to utilize N more efficiently. Rice residue application noticeably reduced the pH of the flooded water as compared with mineral fertilizer alone.

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