达州市白肋烟区植烟土壤养分特征及适宜性研究

摘要

为了解达州地区土壤肥力状况及土壤养分的适宜性,在达州市主要植烟乡镇采集了119个土壤样品进行土壤养分特征分析,并运用模糊数学隶属函数模型对土壤养分适宜性进行研究.结果表明:达州市植烟土壤pH值属适宜偏酸；土壤有机质含量较为丰富；土壤速效氮含量偏高,速效磷含量较高,速效钾含量相对缺乏；达州市土壤养分适宜性指数(IFI值)平均为0.58,变化范围为0.30 ～0.81,白马乡等15个乡镇的土壤养分适宜性达到中、高水平.%In order to understand the soil fertility status and soil nutrient suitability,119 soil samples were collected from the major planting townships of Dazhoushi to analyze their characteristics of soil nutrient,and their suitability of soil nutrient was studied by the fuzzy membership function of mathematical model.The result showed that the pH value of Dazhou planting tobacco soil was suitable for partial acid ; soil organic matter content was relatively rich; soil available nitrogen content was on the high side,available phosphorus content higher,and rapidly-available potassium content relative to the lack ; the average of Dazhoushi soil nutrient suitability index (IFI value) was 0.58,varying in the range of 0.30-0.81,and the soil nutrient suitability of 15 villages,including White horse,reached the middle and high level.