Pedosphere 6(1): 57--61, 1996
ISSN 1002-0160/CN 32-1315/P
©1996 Soil Science Society of China
Published by Elsevier B.V. and Science Press
| Effects of rice straw incorporation and soil pre-flooding on the fate of applied (15NH4)2SO4-N and growth of rice |
| HUANG Zhi-Wu and LU Ren-Jun |
| Laboratory of Plant Nutrition, South China Agricultural University, Guangzhou 510642 (China) |
| ABSTRACT |
| A pot experiment was conducted to investigate the effects of straw incorporation and soil pre-flooding on the fate of (15NH4)2SO4-N and the growth of rice. Excessive application of rice straw when incorporated with (15NH4)2SO4 at the C/N ratio of 40 reduced the loss of (15NH4)2SO4-N and retarded the growth and development of rice significantly, while no adverse effects were observed on dry weight of panicle and the total recovery of (15NH4)2SO4-N when rice straw was incorporated with (15NH4)2SO4 at a C/N ratio less than 25. There were no significant effects of duration of soil pre-flooding within 6 weeks on (15NH4)2SO4-N uptake by rice and on rice growth, but, less loss of (15NH4)2SO4-N was observed in the soil with a longer period of pre-flooding. |
| Key Words: ammonium sulphate, nitrogen availability, rice straw |
| Citation: Huang, Z. W. and Lu, R. J. 1996. Effects of rice straw incorporation and soil pre-flooding on the fate of applied (15NH4)2SO4-N and growth of rice. Pedosphere. 6(1): 57-61. |
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