安徽省主要水稻土基本理化性质及肥力综合评价

以安徽省不同地区水稻土为研究对象,采集了11个剖面共43个土壤样品,测定其基本理化性质并建模评价其肥力质量。结果表明:根据中国土壤系统分类法,安徽水稻土主要是铁聚水耕人为土。土壤大体呈酸性,pH5.0~6.5,土壤有机质和氮素含量等相对较低,表层土壤有机质、全氮、碱解氮平均含量为23.65 g/kg、1.44 g/kg、127.29 mg/kg,土壤质地主要是粉砂壤土。基于改进层次分析法的模糊综合评价模型结果显示,安徽稻田表层土壤肥力质量指数FI普遍介于0.7~0.8,肥力质量大体处于良好水平,且土壤肥力质量与土壤有机质、土壤全氮和碱解氮含量呈现显著的正相关。

Basic Physico-chemical Properties and Fertility Comprehensive Evaluation of Main Paddy Soils in Anhui Province

The paddy soils sampled in different areas in Anhui province are the research object, determined the basic physical and chemical properties of the 43 soil samples collected from 11 soil profiles, and then a model was established to evaluate the fertility quality. The result showed that the groups of the most paddy soils in Anhui province are belonging to Fe-accumuli-stagnic Anthrosols according to the Chinese soil taxonomy. On the whole, the soils appear to be acidic, the pH value is roughly between 5~6.5, the organic matters content and nitrogen content are relatively low, the average content of organic matter, total N and available N in surface soil is 23.65 g/kg, 1.44 g/kg and 127.29 mg/kg respectively, and the majority of the soils texture are silt loam. The fuzzy comprehensive evaluation model based on the improved analytic hierarchy process (AHP) showed that the surface soil fertility index FI was generally between 0.7~0.8, in general, the fertility quality was in good level, and there was a significant positive correlation between soil fertility and soil organic matter, total N and available N content.