Analysis On Nutrient Contents And Flue-cured Tobacco Chemical Quality Of Different Textural Soils On Style In Zhanyi County

In order to learn the relationship between soil texture and quality of flue-cured tobacco leaves. In this experiment,320 soil and 320 flue-cured tobacco leaves samples (C3F grade) were surveyed from 8 main tobacco-growing villages and towns of Zhanyi County of Yunnan and the soil texture resources were analyzed. Using fuzzy mathematics and principal components analysis, we also assessed the nutrient contents, the chemical component contents of flue-cured tobacco leaves and the correlation between soil nutrient contents and tobacco chemical composition contents of 4 kinds of soil texture. The main findings are as follows:The resources of soil texture in Zhanyi County mainly divided into loam and clay texture group, including five categories. The proportion of light loam, medium loam, heavy loam, light clay and medium clay were 1.87%,23.43%,52.81%,21.56% and 0.33%, respectively.There was no significant difference in pH and content of available Zn and available B, but highy significant difference in organic matter, available nitrogen, available phosphorus, available potassium, available Ca, available Mg, available S, available Fe, available Mn, available Cu, available Mo and water soluble chloride content of different soil texture in Zhanyi County.The available phosphorus, available S, available Fe, available Mo and water soluble chloride content were the highest in light loam, while the pH and content of available nitrogen, available Ca, available Mn and available Cu were the highest in heavy loam, and the organic matter, available potassium and available Mg content were the highest in light clay. The average soil fertility index was 0.6410, falls within the scope of â…¢ level. And the SFI in different soil texture was:medium loam>heavy loam>light clay>light loam.There was no significant difference in the ratio of total nitrogen to nicorine, but highy significant difference in nicotine, potassium, chlorine, the ratio of potassium to chlorine and the ratio total sugar to nicotine and significant difference in the content of total sugar, reducing sugar and total nitrogen in different soil texture. The nicotine content and ratio of potassium to chlorine were the highest in light loam, while the total sugar, reducing sugar and chlorine content were the highest in medium loam, the content of potassium was the highest in heavy loam, and the ratio of total sugar to nicotine was the highest in light clay. The average chemical components usability index was 0.6410, falls within the scope of III level. And the CCUI in different soil texture was:medium loam>heavy loam>light clay>light loam.The simple relational analysis indicated that the soil nutrient mainly influenced the total sugar, reducing sugar, total nitrogen, nicotine, potassium, chlorine, the ratio of potassium to chlorine, the ratio total sugar to nicotine and the ratio of total nitrogen to nicotine of tobacco leaves in tobacco-growing areas of light loam. The soil nutrient of medium loam mainly influenced the total nitrogen, nicotine, chlorine and the ratio of total nitrogen to nicotine of tobacco leaves. The soil nutrient of leavy loam mainly influenced the total sugar, reducing sugar, total nitrogen, potassium, chlorine, the ratio of potassium to chlorine and the ratio of total nitrogen to nicotine of tobacco leaves. The soil nutrient of light clay mainly influenced the total sugar, total nitrogen, potassium, chlorine and the ratio of potassium to chlorine of tobacco leaves.