Research On Evaluation Of Soil Nutrients And The Relations Among Indicators In Liuyang County

Liuyang county is a high grade flue-cured tobacco production base with excellent tobacco planting climate and soil conditions, provided high-quality raw materials for the cigarette industry, has been favored in cigarette enterprises. In order to get a comprehensive understanding of Liuyang tobacco planting soil nutrient status.178soil samples were sampled from18towns base on GPS technique in Liuyang tobacco-growing areas,18tobacco Township, collected178soil samples. In Liuyang.main soil nutrients, secondary elements and microelements were analyzed and evaluated, the main conclusions are as follows:1) Liuyang tobacco planting soil acid, pH mean5.39,78.65%soil samples of pH4.～55.5; Organic matter content in soil is appropriate, for an average of31.98g/kg; Soil total nitrogen content is high, with an average of1.98g/kg,92.14%samples of soil total nitrogen content in1.6g/kg above; Soil available N content is high, with an average of155.07mg/kg,95.51%samples of soil available N content in120mg/kg above; Soil total phosphorus content is low, with an average of0.65g/kg, all the samples of soil total P content was below1.2g/kg; Soil available P content is low, with an average of18.71mg/kg,64.61%samples of soil available phosphorus content in the following20mg/kg; Soil total potassium content is lower, the average was14.47g/kg,82.58%samples of soil total potassium content below18g/kg; Soil available K content in the medium level, with an average of126.85mg/kg,66.85%samples of soil available K content in100～150mg/kg.2) Liuyang tobacco planting soil available Ca is very rich, the average content of up to1883.49mg/kg, all samples of soil available Ca content were more than400mg/kg; available Mg content is relatively rich, average149.18mg/kg, all soil samples available magnesium content is above50mg/kg; available S content averaged37.6mg/kg, is in the middle level, respectively17.51%soil samples of available S content less than16mg/kg (below the threshold).3) Liuyang tobacco planting soil available Fe content is very rich, the average content of up to149.66mg/kg, all available Fe content in soil samples was above4.5mg/kg; Liuyang tobacco soil manganese content is more rich, the average value of20.71mg/kg,95.51%soil samples available Mn content in0.50mg/kg above; in Liuyang tobacco planting soil available B content is extremely low, the average content of0.22mg/kg, all the samples of soil available B content in Liuyang tobacco planting below0.5mg/kg; soil available Zn content of the medium, the average was2.00mg/kg,35.23%samples of soil available zinc content below1.5mg/kg; Liuyang tobacco planting soil available Cu is very rich, the average content of up to4.09mg/kg, all soil samples available copper content in1.0mg/kg above; Soil available Mo of lack, the average content is only0.07mg/kg,99.44%samples of soil available Mo content below0.15mg/kg; soil in Liuyang tobacco growing areas of water soluble chloride content is low, the average value of12.08mg/kg,93.25%samples of soil water soluble chloride content below0.15mg/kg.4) nutrient indexes are extremely extensive correlation, multiple indicators are significantly or very significantly correlated.