重庆烟区土壤养分状况分析及综合评价

以重庆烟区256个土壤样品的养分指标为基础数据,全面分析了烟区土壤的养分状况,并运用模糊数学隶属度函数模型对植烟土壤的适宜性进行了综合评价。结果表明:根据优质烟土壤适宜指标分析,重庆烟区有机质含量适中偏低;pH适中偏碱;全氮含量较高,速效氮含量适中;50.39%的土壤可对烟草提供充分的磷素;全钾含量丰富、近60%的土壤速效钾含量适宜;中量元素中有效钙、有效硫含量高,镁含量属中等水平;微量元素有效硼、有效铜普遍缺乏,有60%左右的土壤有效锰、有效锌含量偏低,大部分样品铁含量处于中等水平;氯含量不超标。重庆土壤适宜性指数(SFI)平均为0.684,整体来看,重庆烟区大部分土壤样品的综合指标值总体处于较高(70.7%)水平,另有17.58%和11.72%处于中等和高水平,无样品分布在低水平。不同烟区间以彭水、巫山地区SFI较高(>0.7)。

Analysis and Comprehensive Evaluation of Soil Fertility Status in Tobacco-planting Districts of Chongqing City

According to the nutritive indexes of 256 soil samples in tobacco-planting districts of Chongqing city,the soil fertility in tobacco-planting districts was completely analyzed and comprehensively evaluated by the methods of statistical method and fuzzy synthetic evaluation,and the main results were as follows: the content of organic matter was slightly low;the pH-value was slightly high;the content of total nitrogen was rich and available nitrogen content was moderate;50.39% of soil samples could provide en...