利用尼龙网袋法分析马占相思、蝴蝶豆、蔓草虫豆、猪屎豆、葛、绒毛山蚂蝗和四棱豆7种热带绿肥施人砖红壤后,对其酸度的动态影响.结果表明:施用绿肥后,土壤pH值显著提高,交换性酸总量和交换性铝含量明显降低,并且均在施用后的前2个月内效果最好,此后,土壤pH值快速下降,交换性酸总量和交换性铝含量快速增加,马占相思8个月后pH值显著低于对照,交换性铝含量显著高于对照,蔓草虫豆1 a后的交换性铝含量也湿著高于对照土壤,葛与猪屎豆降低酸度的效果最好.%Based on the analysis of several green manure plant nutrients, the nylon bag method was used to study the dynamic effect of tropical leguminous green manures application on the latosol acidity. The results showed that pH would increase and the exchangeable acidity would decrease after green manures application. The best effect of decreasing the soil acidity appeared in the initial two months after the application of green manure. Then the soil pH decreased and exchangeable aluminum increased rapidly. The soil acidity after the application of Acacia mangium Linn. was higher than the CK soil after 8 months, and the exchangeable aluminum of Cajanus scarabaeoides (Linn.) Thours in Dict was higher than the CK soil one year later. The best green manures of decreasing the soil acidity were Pueraria lobata (Willd.) Ohwi in Bull and Crotalaria mucronata Desv.
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