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防止土壤盐碱化的发生与扩展,是目前黄河下游灌区保证农业增产的重要措施.我们研究了灌区土壤盐分与地下水动态的关系,分析了灌区土壤次生盐碱化发生的地下水条件,提出了保证作物丰产和防止次生盐碱化的地下水控制标准、控制制度和以灌溉、排涝为中心环节的综合防止措施.本文基于“毛细管破裂点”的概念,建议以强烈毛细管上升高度来确定地下水临界深度,其数值比过去减少大约一半,而且改变了重质土的地下水临界深度大于轻质士的传统看法.本文系这项工作的研究报告的一个缩写.
Preventing the occurrence and expansion of soil salinization is an important measure to ensure the agricultural yield increase in the irrigation area of the lower reaches of the Yellow River at present.We studied the relationship between the soil salinity and the groundwater dynamics in the irrigation area and analyzed the groundwater conditions in the secondary salinization of the irrigation area, The groundwater control standard, control system and integrated prevention measures with irrigation and drainage control as the key points to ensure the high yield of crops and prevent secondary salinization.Based on the concept of “capillary rupture point”, we propose to determine the criticality of groundwater with the height of capillary rise Depth, a decrease of about half in value over the past, and has changed the traditional view that the critical depth of groundwater in heavy soil is greater than that of light-weight land. This article is an acronym for the research report on this work.