基于因子分析的土壤肥力综合评价

Integrated Evaluation of Soil Fertility Based on Factor Analysis

为了给施甸县烟区特色优质烟叶生产提供科学合理施肥方案,本文利用因子分析法和系统聚类分析法对施甸县植烟土壤养分进行了分析与综合评价。结果表明,土壤肥力最高的12个样本(占总样本的14.81%),综合得分F∈[0.623 6,1.261 3];土壤肥力较高的32个样本(占总样本的39.51%),综合得分F∈[0.008 4,0.503 0];土壤肥力较低的23个样本(占总样本的28.40%),综合得分F∈[-0.514 1,-0.051 8];土壤肥力最低的14个样本(占总样本的17.28%),综合得分F∈[-1.043 7,-0.565 3]。因此,鉴于全县植烟土壤肥力存在着较大差异,对土壤肥力较高的田地,要施用适量有机肥和复合肥;而土壤肥力处于较低水平的,则要足量、配合施用有机肥和复合肥。

The soil nutrient was analysed and evaluated by the method of factor and system cluster in this paper, in order to provide scientific and reasonable fertilization scheme for characteristic and high-quality tobacco production in Shidian tobacco-growing areas.The results showed that the soil fertility of twelve samples （14.81% of the total）was the highest with comprehensive scores from 0.623 6 to 1.261 3 ;thirty-two samples （39.51% of the total ）was the second with comprehensive scores from 0.008 4 to 0.503 0 ; twenty-three samples （28.40% of the total）was the third with comprehensive scores from -0.514 1 to -0.051 8 ;fourteen samples （17.28% of the total）was the lowest with comprehensive scores from -1.043 7 to -0.565 3. Therefore,in view of great difference in soil fertility through Shidian tobacco-growing areas,the right amount of organic fertilizer and compound fertilizer are applied to the fields of high soil fertility, and plenty of organic fertilizer and compound fertilizer are used for the fields of low soil fertility.