养殖蚯蚓对芒果园土壤理化性质的影响

芒果园养殖蚯蚓的试验结果表明,与清耕土壤(CK)相比,在蚯蚓粪覆盖下,0～20cm土层的土壤电导率提高135%,容重为94.7%,钙含量提高150%,氮含量提高58%,磷含量提高13%,钾含量提高82%,pH值增加1.1,更接近于中性值;20～40 cm土层的土壤电导率提高65%,容重为87.5%,氮含量提高33%,磷含量提高12%,钾含量提高33%,钙含量提高77%。蚯蚓粪对土壤理化性质的改良作用优于牛粪,效果明显。

Effects of Earthworm on the Physical and Chemical Properties of Soil in Mango Orchard

This study showed that breeding earthworm in the mango orchard could improve the soil condition.Compared to the soil which was not mulched(control),in the depth of 0~20 cm soil strata which were mulched with vermicompost,the soil bulk density was 94.7% of control,the soil electrical conductivity improved 135%,the contents of N,P,K and Ca improved 58%,13%,82% and 150% respectively.The soil pH value increased 1.1 approaching neutral state. While in the depth of 20~40 cm soil strata,the soil bulk density was 87.5% of control,the electrical conductivity improved 65%,the contents of N,P,K and Ca improved 33%,12%,33% and 77% respectively.The effect of vermicompost was better than cow dung in improving the soil physical and chemical properties.