施甸县植烟土壤养分丰缺状况综合评价

利用因子分析法对施甸县烟区1 225个土壤样品的9项理化指标进行了综合评价。结果表明,土壤肥力最高的57个样本占总样本的4.65%,综合得分为0.942 3~1.715 5;土壤肥力较高的503个样本占总样本的41.06%,综合得分为0.000 1~0.939 1;土壤肥力较低的573个样本占总样本的46.78%,综合得分为-0.611 5~-0.003 2;土壤肥力最低的92个样本占总样本的7.51%,综合得分为-1.388 9~-0.613 8。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块,要控制氮肥施用量;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。

Integrated Evaluation for Soil Fertility Status in Tobacco-growing Areas

The contents of 9 chemical indexes in 1 225 soil samples were analyzed and evaluated by factor analysis method.The results showed that the soil fertility of 57 samples were the highest,which accounting for 4.65% of the total,and comprehensive scores were between 0.942 3 and 1.715 5; 503 samples were the second,which accounting for 41.06% of the total,and comprehensive scores were between 0.000 1 and 0.939 1;573 samples were the third,which accounting for 46.78% of the total,and comprehensive scores were between-0.611 5 and-0.003 2;92 samples were the lowest,which accounting for 7.51% of the total,and comprehensive scores were between-1.338 9 and-0.613 8.Therefore,in view of great difference in soil fertility of tobacco-growing areas in Shidian County,N fertilizer should be controlled in high soil fertility fields,and plenty of organic fertilizer and compound fertilizer should be applied in low soil fertility fields.