杉木建柏混交林土壤肥力的研究

通过对杉木建柏混交林及杉木纯林土壤团粒组成、养分状况和土壤酶活性的研究分析，结果表明：与纯林相比，混交林土壤大团聚体数量增加，通气性和渗透性增强，土壤结构性能变好；土壤有机质、全量养分和速效性养分均得到提高，土壤保肥性能加强；土壤的水解性酶和氧化还原酶活性增强，土壤肥力提高。因此，杉木建柏混交林具有较好的土壤培肥能力，是一种值得推广的混交造林模式。

A Study on Soil Fertility under Mixed Forest of Cunninghamia lanceolata and Fokienia hodginsii

Through a study on soil aggregate composition,nutrient status and enzymatic activity under mixed forest of Chinese fir Fokienia hodginsii and pure stand of Chinese fir,the results indicated that,compared to pure stand,the soil under mixed forest has more big aggregate,a higher level in porosity and penetrability,and a better structural property.The content of soil organic matter,total nutrition and available nutrition,and the nutrient conserving capacity are higher under mixed forest than that under pure stand.The activity of hydrolyzeable enzymes and oxidized deoxidized enzymes were higher,and the soil fertility has increased to a certain extent under mixed forest.It concluded that the mixed stand is capable of being self rich in soil fertility,and deserves widely spreading.