贵州不同区域尺度植烟土壤养分特征及其养分管理初探

Study on soil nutrient characteristic of tobacco fields with different regional scale and their nutrient management

以6个烟叶主产县、2个烟叶主产地区及全省的植烟土壤5个养分指标为对象,研究贵州不同区域尺度的植烟土壤养分特征及烟叶养分管理。结果表明,县级尺度间的植烟土壤养分平均含量差异较大,地级尺度间的植烟土壤养分平均含量差异缩小。含量变幅呈相反趋势,省级尺度的含量变幅最大,地级尺度间的含量变幅下降,县级尺度内的含量变幅最小。县级尺度间的植烟土壤养分分布频率差异最大,地级尺度间的分布频率差异缩小。根据不同区域尺度的土壤养分特征,对县级尺度的烟叶氮素及省级尺度的磷、氯素养分管理进行了初步探讨。

Five nutrient indexes of the soils for planting tobacco in six counties ,two prefectures and Guizhou province were analyzed to study soil nutrient characteristic of tobacco fields with different regional scale and their nutrient management. The results showed that the variation in different average soil nutrient content was county scale 〉 prefecture scale,the variation range in average soil nutrient content was province scale 〉 prefecture scale 〉 county scale,and the variation in distribution frequency of soil nutrients was county scale 〉 prefecture scale. The paper discussed the nitrogen nutrient management on the county scale and the management of phosphate and Nitrogen nutrient on the province scale according to soil nutrient characteristic of different regional scale.