水土保持学报2017，Vol.31Issue(3)：193-196,4.DOI:10.13870/j.cnki.stbcxb.2017.03.033
脱硫石膏施用下宁夏盐化碱土水盐运移特征
Characteristics of Soil Water and Salt Movement in a Saline Alkali Soil Treated with Desulfurized Gypsum
摘要
Abstract
In order to describe the quantitative relationship between soil salinity in the profile of a saline alkali soil and leaching water volume,the effects of leaching water volume on soil water and salt movement in a typical saline alkali soil in Ningxia Province treated with desulfurized gypsum were studied by an indoor soil column leaching test.The results showed that applying desulfurized gypsum had a positive effect on increasing water infiltration,reducing soil pH and salinity of the 0-20 cm soil layer,and soil desalinization rate was between 84.39 ％ and 95.41％,but large leaching water volume might aggravate soil alkalization.Under continuous leaching condition,the maximum desalting depth lied in the 60-80 cm soil layer.In the 0-20 cm soil layer,the desalting ratio of Cl-and Na+ had a small variation with the increasing amount of leaching water volume.Under small leaching water volume,the desalting ratio of SO42-was lower than those of Cl-and Na+.Under large leaching water volume,the desalting ratios of three ions were very close.In the 20-40 cm soil layer,the desalting ratio of major salt ion was in a descending order of Cl-＞ SO42-＞ Na+,and they increased fast first and then became gentle with increasing leaching water volume,and under small leaching water volume,Cl-,Na+,SO42-accumulated in the 40-60 cm soil layer.Under large leaching water volume,they continued downward migration.When leaching watervolume reached 60 cm,SO42-and Na+ accumulated in the 80-100 cm soil layer,while C1 migrated to ＞100 cm soil layer.关键词
土柱淋洗试验/脱硫石膏/淋洗水量/盐化碱土/水盐运移Key words
soil column leaching test/desulfurized gypsum/leaching water volume/saline alkali soil/water and salt movement分类
农业科技引用本文复制引用
樊丽琴,杨建国,尚红莺,张永宏..脱硫石膏施用下宁夏盐化碱土水盐运移特征[J].水土保持学报,2017,31(3):193-196,4.基金项目
宁夏农林科学院重点科技项目(NKYZ-16-0905) （NKYZ-16-0905）
宁夏农林科学院一二三产业融合发展科技创新示范项目(NKYZ-16-0908) （NKYZ-16-0908）
宁夏农林科学院科技创新先导资金项目(NKYJ-15-35) （NKYJ-15-35）
国家科技支撑计划项目(2013BAC02B05) （2013BAC02B05）
宁夏自然科学基金项目(NZ13121) （NZ13121）
