基于烤烟品质确定烟田的养分管理分区

探明影响烤烟品质的关键土壤养分因子，为划分不同管理分区进行精准管理提供科学依据。在平顶山地区以20 m间隔的网格法取耕层（020 cm）土样111个，测定了8种土壤养分含量；进行逐步回归分析和模糊聚类分析。结果表明，研究区内有机质、总氮、碱解氮和速效磷含量偏低，速效钾含量偏高，且各种养分的差异性均较大；所有养分均可用球状模型进行较好拟合。逐步回归显示，土壤有机质、速效磷、速效钾和阳离子交换量对烟叶品质有较大的影响；应用模糊聚类分析将研究区域划分为4个管理区，验证表明分区结果是可行的。说明土壤有机质、速效钾、速效磷和阳离子交换量是制约烟叶品质的关键土壤养分因子；利用这4种因子可以科学合理地将研究区域划分为4个分区进行烟田养分的精准管理。

Identifying management zones in tobacco-planted fields based on tobacco quality

The objective of this study was to explore the key quality-limiting factors of tobacco,and to provide a solid foundation for scientifically formulated management zone(MZ).One hundred and eleven soil samples were collected from top 20 cm soil layers based on an approximately 20 m grid of the study area,and eight soil properties were analyzed for stepwise multiple regression analysis and fuzzy cluster analysis.The results show that the contents of soil organic matter(OM),total nitrogen(TN),alkalytic nitrogen(...