Pedosphere 10(2): 177--182, 2000
ISSN 1002-0160/CN 32-1315/P
©2000 Soil Science Society of China
Published by Elsevier B.V. and Science Press
Effect of sulphur in rainfall, irrigation water and percolating water on soil sulphur in Jiangxi Province
LIU Chong-Qun, CAO Shu-Qing and XU Jun-Xiang
Institute of Soil Science, the Chinese Academy of Sciences, P.O. Box 821, Nanjing 210008 (China)
ABSTRACT
      Ten rainfall and irrigation water-collecting posts were set up in different ecotype districts of Jiangxi Province, China, to quarterly measure S content in rainfall and irrigation water. A rainwater chemical composition-collecting device was used to collect the sulphur in rainfall, and the amount of sulphur adsorbed on the resin column in the device was determined. The soil percolating water was gathered using 6 lysimeters, built up according to the profile sequence of the red soil derived from red sandstone and the red soil derived from Quaternary red clay, separately. On the lysimeters peanuts, soybean and radish were grown in rotation. Two treatments were designed: without S addition and with S addition at a rate of 14 kg S ha-1. The SO42- contents in rainfall, irrigation water and soil percolating water were determined by the turbidimetry. The results in 1997 showed that the average annual S content in rainwater was 28.13 kg S ha-1, the average S content in irrigation water was 1.7 mg S L-1, and the average content of SO42- in soil percolation water was 2.30 kg S ha-1 year-1 and 4.70 kg S ha-1 year-1 in treatments without and with sulphur application, respectively. In Jiangxi Province, apart from the losses by runoff and leaching, the sulphur in rainfall available to crops is 7.3 kg S ha-1 year-1 and additional S application is required. When rice is grown, however, irrigation water can supply 6.9 kg S ha-1, which, along with the sulphur in rainfall, can almost meet the S requirement of one cropping of rice.
Key Words:  irrigation water, Jiangxi Province, rainfall, soil percolation water, sulphur
Citation: Liu, C. Q., Cao, S. Q. and Xu, J. X. 2000. Effect of sulphur in rainfall, irrigation water and percolating water on soil sulphur in Jiangxi Province. Pedosphere. 10(2): 177-182.
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