The Planting Tobacco Soil Fertility Level And Comprehensive Evaluation In Jiange

This article selects Jian Ge smoke zone 47 representative villages and towns of more than 400 soil samples as the research material,combined with Jian Ge smoke zone leaf tobacco production status,based on the smoke on the determination of soil physical and chemical properties,by selecting scientific statistical method to jiange plant smoke zone of soil nutrient index case described statistics,we analyzed the characteristic of some soil fertility index characteristics Jian Ge smoke,on the basis of the soil nutrient index by experience membership function transformation,so as to achieve the aim of comprehensive evaluation.The main research conclusions are as follows:Soil pH: the soil pH of the whole county is generally weak alkaline.Soil organic matter: liangshan,longyuan,maoba,wooden horse,puan,firewood shop,tianjia,wulian,yangling and other 9 towns and villages have low soil organic matter content.Attention should be paid to increasing soil organic fertilizer,cooperating with farming base fertilizer,and continuously increasing tillage measures to improve soil organic environment on the basis of improving soil environment.Total nitrogen in soil: the soil nitrogen content is generally low in the county,so the proportion of nitrogen fertilizer application should be increased.Soil alkali-hydrolysis nitrogen: the content of alkali-hydrolysis nitrogen in the soil of 47 sample sites in the tobacco area of the whole county is less than 3%,which is at a very low level and affects the quality of flue-cured tobacco smoking.Rapid available phosphorus: soil samples in 19 towns and villages,such as firewood store,tianjia,yangling,beimiao,puan,tushan,zhangwang,changling,zhengxing,gaochi,jiangshi,jinxian,kaifeng,wanghe,ximiao,xiangshen,yandian,yingshui,have low available phosphorus content.Attention should be paid to phosphate fertilizer supply and the proportion of soil phosphorus content should be improved.Effective potassium: white dragon,tablet in the same vertical springs,shop,Guang Ping,silk screen,longyuan,firewood shop,Wen Xi,sheep on the hill,Yang Village,bell,etc.12 towns effective potassium content is low,soil potassium content is low on the one hand,influence the cigarette burning,on the other hand,affect the appearance of flue-cured tobacco quality,lower the quality of flue-cured tobacco,so the smoke zone potash supply should be paid attention to.To sum up,The contents of soil organic matter,total nitrogen,alkali-hydrolyzed nitrogen,available phosphorus,exchangeable magnesium,available boron,available zinc,available iron and chloride ions are low.Soil acidity,exchangeable sulfur and effective manganese content are relatively high;The contents of available potassium,exchangeable calcium and available copper are suitable.According to the comprehensive index of soil fertility(IFI),there are 28 of them distributed at 0.6 < or greater than IFI < 0.8(suitable).