Analysis of the Nutrient Status for Tobacco-growing Soils in Qujing

In order to know the nutrient status of tobacco-growing soils in Qujing,3 716 soil samples were collected and analyzed.The results showed that the average soil pH value was 6.27,the average contents of organic matter,available N,available P,available K,available B and available Cl were 3.7%,130.23 mg/kg,28.14 mg/kg,201.83 mg/kg,0.424 mg/kg and 27.23 mg/kg,respectively.The contents of organic matter and available N were generally high in tobacco-growing soils;except the available P in soils from Fuyuan country was low,the other counties were in the range of appropriate or rich;the available K in soils from Luliang county was low,therefore it should add K fertilizer to the soil;the available B was generally lacking in the tobacco-growing soils.Moreover,the content of soil nutrients shows significant variation at different locations,and the order of coefficient of variation(CV) was available Clavailable B available K available P organic matter.Therefore,the suggestions that the tobacco-growing soils in Qujing should control N content,steady P content and K content,and add B fertilizer were proposed.