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本文对近 5 0年来中国西部耕地土壤盐渍化发展变化做出评估 ,老耕地盐渍化在减轻 ,新垦耕地盐渍化在发展 ,总体处于动态平衡。盐渍化耕地的水盐动态变化 ,实现稳定脱盐的是局部 ,持续积盐的也是局部 ,大部分耕地是脱盐不稳定或脱盐积盐反复型 ,因而土壤盐渍化的潜在危害仍很大。根据土壤盐渍化与水利建设和灌溉水平之间的关系 ,以新疆为例 ,用类比法对今后发展变化作了预测 ,同时还研究了全球气候变化对土壤盐渍化的可能影响。
This paper evaluates the development of soil salinization in the cultivated land of western China in the recent 50 years. The salinization of old cultivated land is being alleviated. The salinization of newly reclaimed cultivated land is developing and is generally in a dynamic equilibrium. The dynamic changes of water and salinity in the salinized cultivated land are localized and the continuous salinization is also partial. Most of the cultivated land is unstable in desalination or repeated salt-desalination, and the potential harm of soil salinization is still very large. According to the relationship between soil salinization and water conservancy construction and irrigation level, taking Xinjiang as an example, the analogy is used to predict the future development and change, and the possible influence of global climate change on soil salinization is also studied.