不同经营模式土壤性质比较及其肥力评价

Comparison of Soil Properties and Evaluation of Soil Fertility in Different Management Models

以板栗+银杏+茶(CGT)、板栗+茶(CT)、纯茶(T)种植模式内土壤为研究对象,分析比较土壤化学性质和土壤酶活性,采用改进层次分析法对各模式土壤肥力进行综合评价。结果表明,茶树与板栗、银杏复合经营模式土壤pH、氮、磷、过氧化氢酶、蔗糖酶、脲酶、脱氢酶、多酚氧化酶均高于纯茶模式,其中脲酶活性增幅较大,CGT、CT模式比T模式分别增加了134.6%、105.1%;各模式土壤肥力质量指数差异较大,CGT、CT、T模式土壤肥力质量指数依次为0.746、0.557、0.453,表明复合模式将有利于提高茶园的土壤肥力,这样既提高了复合系统的生产力,又实现了土壤肥力的可持续。

Soil chemical properties and activities of soil enzymes in Chestnut＋Ginkgo＋Tea（CGT）, Chestnut＋Tea（CT） and Tea（T） models were measured, and the soil fertility in various models were comprehensively evaluated in this study using improved analytic hierarchy process. The results showed that the soil pH, N, P content and enzyme （catalase, sucrase, urease, dehydrogenase and polyphenol oxidase） activities were higher in CGT and CT models than in T model. The urease activities in CGT and CT models increased 134.6 % and 105.1% respectively, with comparison to T model. There was significant difference in the soil fertility quality index among different management models. The order of the soil fertility quality index ranked as CGT （0.746）〉CT （0.557）〉T model （0.453）, which showed that agroforestry model was beneficial for improving soil fertility of Tea garden. It could improve the productivity of agroforestry system and achieved the sustainability of soil fertility.