Stydu on Soil Nutrient Status and Suitability in Burley Tobacoo Planting Areas of Dazhou

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.