【摘要】 通过对黑土结构指标的定量研究,确定颗粒组成、团聚性和孔隙性3个方面的9个结构指标,建立结构综合评价体系,并采用灰色模糊聚类分析法对黑土的结构进行综合评价,确定吉林黑土的结构质量及肥力状况。结果表明,肥力中-低等样品数量占总量的53%,吉林黑土总体肥力状况不容乐观。以灰色模糊聚类分析法评价土壤结构不需要建立评价的分级标准,可以根据评价对象的实际情况进行最优聚类分析,采用结构性指标对黑土肥力和退化进行评价是可行的。更多还原

【Abstract】 According to quantitative study results of soil structure,nine structure indexes of granulometric composition,aggregate and porosity are used to establish structure synthetical evaluation system.Black soil structure is synthetically evaluated by the means of gray fuzzy clustering method and the structure quality grade and fertility situation of Jilin black soil are determined.Results show that soil with moderate-low fertility quality occupies 53% of Jilin black soil,which demonstrates that there is a worse fertility condition of Jilin black soil.It doesn’t need to establish classifying standard in soil structure evaluation using gray fuzzy clustering method,and the best clustering analysis can be done according to the actual condition of evaluated objects.It is feasible that structural parameters are used in the evaluation of black soil fertility and degradation.更多还原