湖北宣恩烟区土壤养分状况综合评价

Comprehensive evaluation of the status of soil fertility in Xuanen tobacco-growing areas of Hubei Province

利用模糊数学和因子分析法对湖北宣恩烟区土壤肥力状况进行了综合评价,结果表明：宣恩烟区土壤中全氮、碱解氮含量偏高,全磷、速效钾、有机质含量适宜,速效磷、全钾含量局部缺乏,水溶性氯含量普遍缺乏,大部分烟区土壤pH较适宜种烟.土壤肥力综合指数平均为0.592,变幅为0.446-0.725,变异系数12.8%.土壤肥力存在差异,高水平样点占29.03%,低水平样点占41.94%.指出,该区平衡施肥时应注意控氮、增磷钾、补施氯硼锌等.

The method of tobacco-gr were too h owing areas in general fuzzy and factor analysis was used to Hubei Province. The results showed The contents of total P and available estimate integrated fertility index of Xuanen that the contents of total N and hydrolytic N K and organic material were good. The contents of available P and total K were deficient in some areas. The contents of water soluble Cl^- were obviously deficient. The soil pH was suitalbe for planting tobacco. IFI average was 0. 592, ranging from 0. 446 to 0. 725 with the coefficient of variation of 12.8%. The soil fertility has differences： high-level sampling point was 29.03% , low-level sampling point was 41.94%. It suggests that controlling N, increasing P and K, supplying Cl^- , B and Zn were needed for balanced fertilization in Xuanen tobaccogrowing areas.