凉山烟区土壤养分分析及施肥对策

对凉山不同烟区植烟土壤养分含量进行了综合评价分析,明确了土壤养分含量与土壤有机质和pH值的相关关系。结果表明:(1)凉山烟区土壤有机质含量中等偏丰富;氮含量中等偏低;北部烟区磷含量中等,南部烟区磷含量中等偏低;北部烟区钾含量偏低,南部烟区钾含量中等偏丰富;氯、硼含量偏低;铜、锌、铁、锰含量呈中等偏丰富水平;北部烟区钙含量中等偏低,南部烟区钙含量丰富;北部烟区镁含量中等偏低,南部烟区镁含量中等偏丰富;北部烟区阳离子交换量偏低,南部烟区阳离子交换量中等;北部烟区土壤偏酸性,南部烟区各约有1/3的土壤偏酸性和偏碱性。(2)氯、钙、镁、锰与有机质含量呈负相关关系,其余养分含量与有机质呈正相关关系;钙、镁与土壤pH值呈正相关关系,其余养分含量与土壤pH值呈负相关关系。并针对该烟区植烟土壤养分状况提出施肥建议。

Analysis of Soil Nutrients and Fertilization Technology in Liangshan Tobacco Growing Area

In order to provide reference for reasonable fertilization in tobacco planting,the soil nutrients in Liangshan tobacco growing area were evaluated,the correlations between soil nutrients and soil organic matter,pH-value were analyzed too.The results showed that:(1)The content of organic matter in Liangshan soil was moderate or rich;the content of N was moderate or low;available P content in northern part was moderate,and that in southern part was moderate or low;available K content in northern part was low,and that in southern part was moderate or rich;B and Cl content were low;available Cu,Zn,Fe and Mn content was moderate or rich;Ca content in northern part was moderate or low,and that in southern part was rich;Mg content in northern part was moderate or low,and that in southern part was moderate or rich;CEC in northern part was low,and that in southern part was moderate;the soil of northern part was acidic,but in southern part,1/3 soil was acidic and 1/3 soil was alkaline.(2)The contents of Cl,Ca,Mg,and Mn had a negative correlation with the content of organic matter,but the rest nutrients of soil appeared a positive correlation with organic matter content.The contents of Ca and Mg had a positive correlation with pH-value of soil,the rest appeared a negative correlation with pH-value.Moreover,some fertilization suggestions were proposed according to soil nutrient status of this tobacco growing area.