Studies on Dynamic Changes of Latosol Acidity After Leguminous Green Manure Application
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.