Pedosphere 2(3): 209--217, 1992
ISSN 1002-0160/CN 32-1315/P
©1992 Soil Science Society of China
Published by Elsevier B.V. and Science Press
| Gaseous Loss of Nitrogen from Fertilizers Applied to a Paddy Soil in Southeastern China |
| CAI GUI-XIN, YANG NAN-CHANG, LU WAN-FANG, CHEN WEI, XIA BAI-QI, WANG XIAN-ZHONG, ZHU ZHAO-LIANG |
| LMCP, Institute of Soil Science, A cademia Sinica, P. O. Box 821. Nanjing 210008 |
| ABSTRACT |
| Total nitrogen (N) loss and ammonia volatilization from urea applied to flooded rice grown on a paddy soil in Zhejiang Province were measured by 15N balance and micro-meteorological methods, respectively. Floodwater properties and ammonia loss from the circular plot were compared with those from the microplots. And the effectiveness of urease inhibitor, NBPT [N-(n-butyl) thiophosphonc triamide], was also tested Results showed that the total losses from urea broadcast and incorporated at transplanting (basal dressing) were similar with those from urea broadcast 12 days after transplanting (top-dressing) (51.5% and 48%, respectively, of applied N), and ammonia losses were low, the corresponding figures were 10.8% and 7.0% of applied N, respectively. Thus, denitrification was a much more important pathway of nitrogen loss than ammonia volatilization under the particular conditions. |
| Key Words: |
| Citation: Cai, G. X., Yang, N. C., Lu, W. F., Chen, W., Xia, B. Q., Wang, X. Z. and Zhu, Z. L. 1992. Gaseous Loss of Nitrogen from Fertilizers Applied to a Paddy Soil in Southeastern China. Pedosphere. 2(3): 209-217. |
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