基于土壤钠离子含量的不同施用量石膏改良剂的改良效果  

The effect of gypsum improver based on Na^+ concentration in soil

作　　者：罗小东[1] 王全九[1] 谭帅[1] 

机构地区：[1]西安理工大学水资源研究所,陕西西安710048

出　　处：《干旱地区农业研究》2016年第1期288-292,共5页Agricultural Research in the Arid Areas

基　　金：水利部公益性行业科研专项经费项目(201301102);新疆维吾尔自治区科技计划项目(201330103-3)

摘　　要：以土壤中钠离子含量为依据,分析石膏施量对土壤水盐分布和作物生长的影响,从而确定石膏改良剂合理施量。结果表明:石膏施量为土壤钠离子含量的200%时,土壤的容重下降14.44%,较其他处理下降幅度大;石膏施量为土壤钠离子含量的200%和300%时,土壤的含水量较其他处理增加幅度大,分别为5.94%和6.21%;石膏施量为土壤钠离子含量的200%和300%时,更有利于土壤的脱盐,相对脱盐率分别为14.1%和13.6%;各施量都增加了棉花的茎粗、产量,施量为土壤钠离子含量的200%时,棉花的茎粗和产量增加最多,分别为1.6 mm和45 kg·667m^(-2);当石膏施量为100%、200%和300%时,经济效益增加,相比对照分别增加108、263、148元·667m^(-2),当石膏施量为350%时,经济效益降低,相比对照降低了44元·667m^(-2)。Influence of gypsum on soil salt distribution and crop production was analyzed in this research based on sodium ion content in soil, allowing a reasonable application of gypsum. Our results showed that when the application of gypsum was 200% of the sodium ion content in soil, soil bulk density could be lowered by about 14.44%. In addition, when the application of gypsum was 200 % and 300 % of the sodium ion content in soil, water content could be increased by about 5.94% and 6.21%, respectively. Moreover, when the application of gypsum was 200% and 300% of the sodium ion content in soil, conductivity of soil desalination was enhanced, resulting in desalination rates at 14.1% and 13.6%. Furthermore, each treatment increased stem diameter and yield of cotton. Among all treatments, 200% of the sodium ion content in soil was the best. Also, when the applications of gypsum were 100%, 200% and 300% of the sodium ion content in soil, the economic benefits for farmers could be increased by 108, 263 yuan· 667m^-2 and 148 yuan·667m^-2. However, when the application of gypsum was 350% of the sodium ion content in soil, the economic benefit for farmers was rather reduced by 44 yuan· 667m^-2.

关 键 词：盐碱地 石膏改良剂 水盐运移 土壤容重 经济效益 

分 类 号：S156.4[农业科学—土壤学]