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采用野外调查采样和室内分析测定的方法,研究了湖南省丘岗地区7种类型水稻土的肥力状况,并选取土壤有机质、全N、全P、全K、碱解N、有效P、速效K、缓效K、有效Si、有效Zn含量和土壤pH共11项肥力指标,采用Fuzzy综合评判法,对湖南水稻土的肥力质量进行综合评价.结果表明,供试水稻土土壤偏酸性,有机质含量中等偏上,全K、碱解N含量较高,全N、全P含量一般,有效P、速效K、有效Si和有效Zn含量较低,有效S含量较丰富.供试水稻土土壤肥力质量高低不等:祁阳的灰泥田土壤肥力质量水平较高,达二级;宁乡的红黄泥和河沙泥、祁东的紫砂泥、醴陵的麻沙泥和湘潭的紫泥田水稻土壤肥力质量水平中等,为三级;株洲的黄泥田土壤肥力质量最低,仅为四级.
The soil fertility of seven types of paddy soils in the hilly area of Hunan Province was studied by field survey and indoor analysis. Soil organic matter, total N, total P, total K, available N, available P, available K , Slow-acting K, available Si, available Zn and soil pH, and the comprehensive evaluation of the fertility quality of paddy soils in Hunan was carried out by Fuzzy comprehensive evaluation method.The results showed that the partial acidity and organic matter content Moderately upper K, total alkali N, higher total N, total P, available P, available K, available Si and available Zn, and available S, The soil fertility quality of the gray clay soil in Qiyang is higher than that in the second soil. The soil fertility level of the soils of Honghuang and Heisha mud in Ningxiang, Zisha mud in Qidong, Ma mud in Liling and purple muddy soil in Xiangtan Medium, for three; Zhuzhou yellow muddy soil fertility lowest quality, only four.