Pedosphere 1(2): 145--155, 1991
ISSN 1002-0160/CN 32-1315/P
©1991 Soil Science Society of China
Published by Elsevier B.V. and Science Press
| Fate of Fertilizer Nitrogen Applied to Crops Grown on Fluvo-Aquic Soil in Huang-Huai-Hai Plain |
| WANG XIAN-ZHONG, ZHANG SHAO-LIN, XU YIN-HUA, ZHU ZHAO-LIANG |
| Institute of Soil Science. Academia Sinica, P.O. Box 821,Nanjing |
| ABSTRACT |
| The fate of urea-and ammonium bicarbonate (ABC)-nitrogen (N) applied by prevailing traditional techniques to winter wheat (Triticum aestivum L.) or maize (Zea mays L.) grown in the fields of Fluvo-aquic soil was investigated using 15N tracer-micro-plot technique. Results show that:(1) at maturity of wheat, N recovery in plants and N losses of urea and ABC applied at seeding in autumn were 31-39%, and 34-46%, respectively, while the corresponding figures for side-banding at 10 cm depth in early spring were 51-57%, and 5-12%; surface-broadcast of urea followed by irrigation at early spring was as efficient as the side-banding in improving N recovery in plants and reducing N loss, however, such technique was found less satisfactory with ABC. (2) At the maturity of maize, N recovery in the plants and N loss of urea and ABC sidebanded at seedling stage or prior to tasseling ranged from 23% to 57%, and 9% to 26%, respectively. |
| Key Words: |
| Citation: Wang, X. Z., Zhang, S. L., Xu, Y. H. and Zhu, Z. L. 1991. Fate of Fertilizer Nitrogen Applied to Crops Grown on Fluvo-Aquic Soil in Huang-Huai-Hai Plain. Pedosphere. 1(2): 145-155. |
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