The comprehensive evaluation of soil fertility status for tobacco-growing areas in Hu’nan province
2006
Li Yanyan | Xu Zicheng | Xiao Hanqian
Chinese. 对湖南省12个主要植烟县（市）1 612个土壤样品的养分指标进行了测定，并运用主成分分析法确定了各土壤养分指标的权重，通过估算土壤肥力综合指标值（IFI）对湖南植烟区土壤肥力进行了综合评价。结果表明：（1）湖南植烟区土壤中有机质和氮素养分含量较高，磷素（全磷和有效磷）和钾素（全钾和有效钾）的养分含量较低，土壤pH值、有效硫和水溶性氯含量适宜；（2）湖南植烟区的土壤肥力存在广泛变异，全省IFI的变异为0.127～0.968，平均0.547，变异系数19.17%；（3）根据IFI大小将全省土壤肥力分为高、较高、中等、较低和低5个等级，属于中等以上土壤肥力植烟区所占的比例为92.3%，其中龙山和浏阳的IFI平均值较高，东安和衡南的IFI平均值较低，其余地区IFI平均值居中。
Show more [+] Less [-]English. 10 soil nutrient indexes of 1 612 soil samples from 12 main tobacco-growing counties in Hu’nan province were determined. The method of principal component analysis was employed to determine the weight value of each index, and the soil feasibility for Hu’nan tobacco-growing area was evaluated by estimating integrated fertility index (IFI) of each soil sample. The results indicated that: (1) contents of organic matters, total N and hydrolytic N in Hu’nan tobacco growing soils were rich, but contents of P (total P and available P) and K (total K and available K) in soils were low. pH value, available S and water soluble Cl were suitable. (2) There existed significant variation for the soil fertility of Hu’nan tobacco-growing area. IFI values of the whole province ranged from 0.127 to 0.968, with the mean of 0.547 and the coefficient variation of 19.17%. (3) According to IFI values, soil fertility of the whole province could be classified into five grades: higher, high, medium, low and lower. The proportion of soil fertility grades above medium was 92.3%. The IFI values of Longshan and Liuyang were higher; those of Dong’an and Hengnan were lower; and those of other counties were medium.
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This bibliographic record has been provided by Institute of Agricultural Information, Chinese Academy of Agricultural Sciences