脱硫石膏对盐碱土改良效果研究  

Study on improve effect of desulfuration gypsum on saline-alkali soil

作　　者：魏淑贞[1] 张伟华[1] 岳殷萍 WEI Shuzhen ZHANG Weihua YUE Yinping(Inner Mongolia Agricultural University,Hohhot 010018,China)

机构地区：[1]内蒙古农业大学,内蒙古呼和浩特010018

出　　处：《北方农业学报》2017年第2期58-62,共5页Journal of Northern Agriculture

摘　　要：为了研究连续灌水条件下脱硫石膏对盐碱土的改良效果,采用土柱模拟试验,选取脱硫石膏作为改良剂,开展盐碱土改良的淋溶试验,分析土壤及淋滤液的有关指标,确定脱硫石膏合理的施用量。结果表明,脱硫石膏中的Ca^(2+)可以与土壤胶体吸附的Na^+发生代换反应,调节离子平衡,改良效果显著;且脱硫石膏施用量为理论值的1.2倍是较合理的用量。In order to study the regularity of physico-chemical properties of soil column under continuous irrigation, reasonable application rate and irrigation amount of desulfuration gypsum and humic acid were determined. By using soil column simulation test, desulfurized gypsum was selected as modifiers. The leaching experiments of saline - alkali soil were carried out to analyze the relative indexes of soil and leachate.The results showed that Ca2＋ in desulfurized gypsum can replace the Na＋ adsorbed by soil colloid, adjust the ion balance, the effect was significant, and the desulfurization gypsum dosage 1.2 times of the theoretical value was more reasonable.

关 键 词：盐碱土 脱硫石膏 改良 

分 类 号：S156.4[农业科学—土壤学]