Pedosphere 2(4): 345--354, 1992
ISSN 1002-0160/CN 32-1315/P
©1992 Soil Science Society of China
Published by Elsevier B.V. and Science Press
| Ammonia Volatilization from Urea Applied to Acid Paddy Soil in Southern China and Its Control |
| CAI GUI-XIN1,2,3, PENG GUANG-HAO1,2,3, WANG XIAN-ZHONG1,2,3, ZHU JIAN-WEN1,2,3, ZHU ZHAO-LIANG1,2,3 |
| 1.LMCP, Institute of Soil Science, A cademia Sinica, P. O. Box 821, Nanjing 210008;2.Institute of Soil Science, A cademia Sinica, P. O. Box 821, Nanjing 210008 (China);3.Department of Biology, August 1st Agricultural College of Xinjiang, Urumqi 830052 |
| ABSTRACT |
| Results showed that ammonia loss from urea broadcast into floodwater and incorporated into soil at transplanting was as high as 40% of applied N, and the corresponding total nitrogen (N) loss was 56%. Ammonia loss was measured with simplified micrometeorological method (ammonia sampler), and total N loss was concurrently measured using 15N balance technique. The experiment was conducted under strong sunshine conditions on acid paddy soil derived from Quaternary red clay. The ammonia loss in this particular condition was much greater than those obtained from previous studies when urea was also applied to acid paddy soil but under cloudy conditions. It is concluded that the strong sunshine conditions with high temperature and shallow floodwater during the period of present experiment favoured ammonia volatilization. |
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| Citation: Cai, G. X., Peng, G. H., Wang, X. Z., Zhu, J. W. and Zhu, Z. L. 1992. Ammonia Volatilization from Urea Applied to Acid Paddy Soil in Southern China and Its Control. Pedosphere. 2(4): 345-354. |
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