纳板河流域不同土地利用类型下土壤综合肥力分析

Integrated Soil Fertility Quality Analysis under Different Land Use Types in Naban River Watershed

运用相关关系分析确定权重系数,并采用土壤质量指数法进行土壤综合肥力分析。通过土壤有机质、全氮、速效磷,速效钾以及pH值等5个土壤肥力指标测定,对西双版纳纳板河流域自然保护区6种土地利用类型(自然林、混合林、茶园、玉米地、橡胶林、水稻田)的38个表层(0～20 cm)土壤肥力性状进行比较分析和土壤质量评价。结果表明,6种不同土地利用类型之间土壤肥力评价指标具有明显的异质性,不同土地利用类型土壤综合肥力质量排序为:自然林(64.30)>混合林(60.66)>茶园(57.09)>玉米地(52.66)>橡胶林(41.49)>水稻田(35.81)。

Soil physical and chemical properties of 38 topsoil （0 -20 cm） samples collected from 6 types of land use （forest, mixed forest, maize, tea, paddy, rubber） at Naban River Watershed Na- tional Nature Reserve in Yunnan Province were tested to study the effect of land use type on soil quality by the method of soil quality index. Based on correlation analysis, the integrated soil quality indices of major land use were calculated with 5 indicators including soil organic matter, total nitrogen, available phosphorus, available potassium and pH. Results indicated that there was obvious difference of soil quality index among 6 vegetation types, and the order of integrated soil quality index was as follows： forest （64.30） 〉 mixed forest （60.66） 〉tea （57.09） 〉maize （52.66） 〉rubber （41.49）〉 paddy （35.81）.