Grade and Evaluation of Arable Land Salinization Based on Cotton-Water-Salt Production Function
ZHENG Zhong
ZHANG Feng-rong
MA Fu-yu
ZHOU Jian-wei
HE Shuai
Abstract：Salinization of arable land is a direct threat to the sustainable development of irrigated agriculture in arid areas.In this paper,based on the establishment of cotton-water-salt production function,salinization level of arable land in oasis irrigation areas was divided and evaluated.The results showed that critical and tolerant soil electrical conductivity for cotton was 6.8 dS/m and 22.11 dS/m,respectively.It was less than average value for whole cotton growth period respectively recommended by Food and Agriculture Organization (FAO).According to the salt tolerance and relative yield of cotton,salinization degree of arable land was preliminarily divided into six grades,and suitable soil salt content for cotton was below 0.43 percent.85% of normal production could be obtained if salt content in 0～60 cm soil profile were controlled to within 0.29 to 0.43 percent.It is entirely possible that moderate soil salinization is improved to slight through reasonable measures of irrigation and drainage.The division and evaluation of salinization degree of arable land is realized by the study on crop-water-salt production function.
Keywords：cotton-water-salt production functionsalinizationgradearable land
Publication Date：2010-01-01
Online Publishing Date：2026-09-12(First online date of this platform, not the publication date of the document)
Pages：3( 47-49 )