Nutrient Distribution Characteristics of Different Soil Types with Different Elevation in Ankang Tobacco Cultivation Area

The content of organic matter,available nitrogen,available phosphorus,rapid available potassium and micronutrients of different tobacco-planting soils with different elevation in Ankang tobacco area was analyzed to study nutrients distribution of different tobacco-planting soils.Organic matter and available phosphorus content of tobacco-planting soil with an elevation of 600~700 mis maximum,significantly higher than tobacco-planting soils with other different elevations.Available nitrogen content of tobacco-planting soil with an elevation of 600~700 mis higher but no significant difference among tobacco-planting soils with different elevations.Rapid available potassium content of tobacco-planting soil with an elevation of 500~700 mis significantly higher than tobacco-planting soils with other different elevations but there are no significant differences in content of chlorine,effective boron and effective copper.Available Mn content of tobacco-planting soil with an elevation of 700~800 mis significantly higher than tobacco-planting soil with below an elevation of 600 mbut no significant difference with other different elevations.Available Fe content of tobacco-planting soils with an elevation of 600~700 mis significantly higher than tobacco-planting soils with an elevation of 500~600m.Available Zn content of tobacco-planting soil with an elevation of 600~800 mis significantly higher than tobacco-planting soils with other different elevations.Organic matter and available nitrogen content of Liaojiang loess is maximum but available phosphorus and potassium content of Baishan soil is maximum.Chlorine and available B content of Baishan soil is the highest.Available Fe content of yellow soil is the highest.Chlorine,available B and available Fe content of Liaojiang loess is the lowest.Available Cu and Zn content of sandy soil is the highest while available content of yellow soil is the highest.There is no difference in available Mn content among Liaojiang loess,sandy soil and Baishan soil.