Effects of Different Intermembrance Treatments on Soil Water and Salt Transport Through Drip Irrigation Under Film
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    Abstract:

    [Objective] To seek a reasonable method in soil salinity accumulation controlling between membrane, in order to provide the basis for control the salt accumulation on soil surface.[Methods] Different intermembrance treatments were employed, including:straw covering, laying sand, PAM(polyacrylamide) spraying, compacting and controlled treatment, to analyze the efficacy of the treatment measures.[Results] (1) All the treatments could reduce the moisture evaporation. The evaporation in straw covered, sand spread, spraying PAM, compacting, and the controlled treatment was 0.11, 0.34, 0.59, 1.55 and 2.32 cm, respectively.(2) All the treatments could reduce the moisture evaporation of membrane narrow row, and improve soil moisture of membrane narrow line. At 10 cm depth of the narrow line, the relative reduction of soil moisture in straw covered, laying sand, spraying PAM, compacting, and the controlled treatment was 47%, 45%, 56%, 64% and 77%, respectively.(3) All the treatments reduced salt accumulation in the root zone of the crop. At 10 cm depth of the narrow line, the relative desalination in straw covered, laying sand, spraying PAM, compacting and the controlled treatment was 3%, 2%, 0%,-16% and-28%, respectively.[Conclusion] Applying intermembranes treatments can reduce the water loss and salt accumulation in the root zone. Straw covering is the best methods in reducing soil water loss and salt accumulation in the root zone.

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罗小东,王全九,谭帅.膜下滴灌条件下膜间不同处理对土壤水盐运移的影响[J].水土保持通报英文版,2015,35(5):117-122

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History
  • Received:July 08,2014
  • Revised:August 31,2014
  • Adopted:
  • Online: April 05,2016
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