秦岭南坡锐齿栎林、松栎混交林林地土壤特性研究

本文探讨了秦岭南坡锐齿栎林及松栎混交林林地土壤的养分状况、化学性质及土壤的酶活度特点。结果表明：松栎混交林林地土壤的养分状况明显优于锐齿栎林，特别在土壤N、P、K含量方面表现的尤为突出；土壤活性酸pH锐齿际林在表层土壤明显低于松栎混交林，交换性酸、交换性氢及交换性铝显著高于松栎混交林；所测定的几种主要酶类活度锐齿栎林林明显小于松栎混交林林地，说明了锐齿栎林地土壤的生物活性及物质转化速度比松栎混交林林地低。

Soil Characteristics of Sharptooth Oak Forest and Mixed Forest between Pine and Oak on South-facing Slope of the Qinling Mountains

Nutrient, chemical properties and enzyme activity in soil of sharptooth oak (Quercus aliena Bl. var. acuteserrata Maxim. ) and mixed forest between the oak and chinese pine (Pinus tabulaeformis Carr. ) were investigated on south-facing slope of the Qinling Mountains. Condi-tions of nutrients in the mixed forest were obviously better than those in the oak forest, especially the contents of nitrogen, phosphorus and potassium; the active acid pH in topsoil of the oak for-est was clearly lower than that of the mixed forest, however the exchangeable acid, exchangeable hydrogen and exchangeable aluminium in the topsoil of the oak forest were significantly higher than those of the mixed forest, which reflected that the oak forest could lead to acidition in top-soil: the activity of enzymes determined in the oak forest was obviously weaker than that of the mixed forest, which indicated that the biotic activity and rate of substance change in soil of the oak forest were slower than those of the mixed forest.