施用不同土壤改良剂对砖红壤酸度的影响

对砖红壤施用不同的改良剂,经一年的大田试验,测定土壤的活性酸与交换酸研究不同土壤改良剂对酸性土壤酸度的影响。试验结果表明：滤泥单施与石灰单施处理能有效降低土壤的活性酸以及交换性酸的含量,有较好的降低土壤酸度的效果,而施用绿肥、甘蔗渣、羊粪以及羊粪与膨润土混施均不能有效降低土壤的酸度。

Effect of Different Soil Amendments on the Acidity of Latosol

Bentonite,lime,filtered mud,goat dung,bagasse and green manure (stylo) were used as soil amendments to apply to marine deposit latosol in the field at Ongtian township,Wenchang,Hainan,China,and the active acidity and exchangeable acidity of the latosol were determined 1 year after soil amendments were applied. The results showed that single application of the filtered mud or the lime decreased the soil content of active and exchangeable acidities,which indicated that either the filtered mud or the lime can reduce the soil acidity effectively,whereas the green manure,goat dung,and the mixture of goat dung and bentonite failed to reduce effectively the soil acidity.