To Research The Planting Tobacco Soil Fertility Level And Comprehensive Evaluation In Jiange

This article selects Jiange smoke zone 47 representative villages and towns of more than 400 soil samples as the research material,combined with Jiange 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 Jiange 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:(1)the county soil ph value is generally a weak alkaline,gang only smoke zone of flue-cured tobacco growth well test sample reached 62.5%,11 townships alkaline soil,should be increasing the soil ph regulator,improve soil physical and chemical environment;There were 23 villages and towns,soil organic matter content is low,there are nine villages and towns of soil organic matter content is very low,so we should pay attention to increasing soil organic fertilizer application,increase basal dressing;There were 34 township soil total nitrogen content is low,should increase the amount of nitrogen fertilizer proportion.Soil alkaline hydrolysis nitrogen content is generally low,to improve soil alkali-hydrolysable nitrogen content;There were 19 villages and towns soil available p content is low,should pay attention to phosphate fertilizer supply,improving soil p content ratio;There were twelve 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 attention should be paid to potash supply.(2)the county comprehensively: Jiange smoke zone generally low nitrogen content and organic matter content,p content is relatively low,should pay attention to on the basis of improving soil physical and chemical properties,soil testing and formula,the reasonable fertilization improved good Jiange smoke zone of soil fertility.(3)from the comprehensive soil fertility index(IFI): distribution in 0.4 or less IFI< 0.6(appropriate)has 28,accounted for 59.6%,explain Jiange smoke zone IFI value mainly concentrated in the lowest level,smoke zone soil fertility to be into a not ascend.On the other hand,kaifeng,bowl of spring,locatedon,Ying Shui plant smoke zone comprehensive soil fertility index 0.5,or better fertility characteristics.Look from within the scope of the county,there are 42 samples of soil fertility on the low side,on the one hand to fertilization,on the other hand,to increase the area of flue-cured tobacco crop rotation and crop rotation rate,improve the growth of flue-cured tobacco soil environment,so as to achieve the aim of improving tobacco soil fertility,and lay a foundation for the growth of flue-cured tobacco.