有机肥对茶园土壤酸碱性的影响

Effect of organic fertilizer on acidity-alkalinity ballance of tea soil

茶园土壤具有一定的缓冲性能,能缓解外界酸碱对体系的影响。有机肥能有效地增加土壤有机质,但多数有机肥呈碱性,对土壤的酸碱度有较大的影响。试验中按不同比例混合土壤和羊粪,发现5%的有机肥就已经改变了体系的酸碱平衡,此时体系的酸碱性由其中的羊粪决定,土壤原有的缓冲体系已经被破坏。因而在施用有机肥时,要考虑其对土壤酸碱性的作用。

Effect of fertilizers on acidity or alkalinity of tea soil may be weaken to a certain extent by the buffer capability of the soil. Organic fertilizers effectively enhanced organic matters in the soil,in which the soil pH might be increased owing to alkalinity property of the organic fertilizer. In this experiment,5% organic fertilizer (sheep dung) added could change the equilibrium of the acidity-alkalinity balance of the soil system. The pH of the acidity-alkalinity system depended on the sheep dung used. The influence of organic fertilizers on the acidity-alkalinity balance should be taken into account when oranic fertilizers is applied.