生态学杂志2012，Vol.31Issue(7)：1745-1750,6.
石膏改良苏打碱土.Ⅰ.经济改良层石膏用量的确定
Gypsum application in amelioration of soda-alkaline soil.Ⅰ.Determination of economical application amount
摘要
Abstract
Applying gypsum can ameliorate saline-alkali soil, and soil column leaching experiment is one of the methods to verify the amelioration effect. In this study, the ameliorating soil layer was defined as 0-40 cm, and an indoor soil column leaching experiment was conducted. The 0-10 cm soil layer was thoroughly mixed with the calculated amounts of gypsum, and the filtrate was collected to determine the ionic composition which was then converted into salt. Reasoning calculation method was adopted to calculate the amounts of applied gypaum in the processes of dissolution, transformation, and leakage as well as the amounts of the applied gypsum acted with alkaline salts and exchangeable sodium and magnesium. The results showed that after four times of leaching, the physical and chemical conditions of the soil column improved remarkably , infiltration time reduced, soil pH value decreased from 9. 25 to 8.20, and soil exchangeable sodium percentage basically reached to 10. There still had some gypsum left. Theoretically, the most economical application amount of gypsum for the amelioration of soda-alkaline soil was 0.05 t ·hm-2.关键词
脱硫石膏/苏打盐碱土/改良层Key words
desulfurized gypsum/ soda saline-alkali soil/ improvement layer.分类
农业科技引用本文复制引用
金梁,乌力更,魏丹,胡克林,赵丽兵,魏鲁玉..石膏改良苏打碱土.Ⅰ.经济改良层石膏用量的确定[J].生态学杂志,2012,31(7):1745-1750,6.基金项目
国家自然科学基金项目(41171245)和联合国开发计划署东北黑土子项目(CPR/06/209-13)资助. （41171245）
