曲靖烟区土壤养分状况的综合评价

目的]明确曲靖烟区土壤养分状况,为优质烟叶的生产提供理论依据。方法]从云南省曲靖市9个县(市)的植烟区采集340个土壤样品,采用因子分析法和模糊数学隶属度函数模型对曲靖市植烟土壤状况进行综合评价。结果]曲靖烟区土壤肥力存在广泛变异,其土壤肥力指标(SFI)值平均为0.671,变幅为0.311～0.900,变异系数为14.57%。根据SFI值的大小将全市土壤肥力分为高、较高、中等、较低和低5个等级,中等肥力以上占99.12%,其中高和较高等级肥力的土壤分别占10%和67.94%。结论]曲靖市烟区的综合肥力指标较高,高和较高综合肥力指标的土样占总土样的77.94%,但土壤有机质、碱解氮含量偏高,全磷、全钾和有效镁含量偏低,严重缺硼,建议曲靖烟区在平衡施肥时要注意控制氮肥,补充镁肥,增施硼肥。

Comprehensive Evaluation on Status of Soil Fertility in Qujing Tobacco-growing Area

Objective] The study aimed to make clear the status of soil fertility in Qujing tobacco-growing area and provided the theoretical basis for the production of tobacco with good quality.Method] 340 soil samples were selected from the tobacco-growing areas in 9 counties or cities of Qujing City in Yunnan Province and the methods of factor analysis and membership function of fuzzy mathematics were used to estimate the status of soil fertility in Qujing tobacco-growing areas.Result] There was significant vari...