恩施州烤烟烟区土壤肥力特征分析

为给恩施州烤烟烟区生态环境保护、土壤改良和烟草合理施肥提供理论依据，采用多元统计分析方法，综合评价了恩施州烤烟烟区土壤肥力特征。结果表明。全州土壤养分含量分布极不均衡，各植烟，点间的养分含量差异较大。土壤pH值处于适宜范围内；有机质、全氮和碱解氮含量高，土壤供氮能力强：近47％的土壤处于缺钾的状态；土壤有效硼含量较低，属于缺硼土壤；其他养分含量适中。将恩施州土壤养分含量划分为4大类，第1类植烟土壤面积最小，出现缺钾现象，有效硼含量丰富：第2类土壤面积较大，该类土壤钾含量稍偏低，有机质、速效磷、碱解氯（128.49mg·kg^-1）、有效硫（73.99mg·kg^-1）含量相对最低；第3类土壤速效钾、碱解氮、有效硫舍量最丰富，有效硼含量最低（0.23mg·kg^-1），属于严重缺硼土壤；第4类土壤酸性最小，全氮、速效磷、交换性钙、交换性镁含量均为最高。

Researchs on the Soil Fertility of Flue-cured Tobacco-growing Areas in Enshi

To supply references for the protection of ecological environment,soil improvment and rational fertilization of flue-cured tobacco-growing areas in Enshi Prefecture,soil fertility characteristics were comprehensively evaluated in Enshi tobac-co-growing areas with the method of multivariate statistics.The results indicated that the soil fertility existed significant varia-tion in Enshi tobacco growing areas.Soil pH value was in an appropriate amount for tobacco.The average contents of or-ganic matter,total N...