摘要
通过对数据的无量纲处理确定土壤质量的单指标指数,用已修正后的内罗梅公式计算综合质量,对重庆市万州区1982年和2005年土壤质量单指标指数和综合质量进行了全面的分析评价,得出土壤质量的演变特征:一方面土壤中有机质含量增加,土壤综合质量提高,土壤质量为“低”等级的耕地所占比例减少,土壤质量为“良好”、“中等”等级的耕地所占比例增加,旱地转变为菜地、园地或撂荒地,土壤质量也相应提高;另一方面是土壤酸化、土壤中养分不均衡,土壤质量为"优"等级的耕地比例减少。在此基础上分析了变化的原因,并提出实现土壤资源可持续利用的对策。
Available data were subjected to non -dimension processing to derive the indicators for single factors and modified Nemoro formula was used to make trail assessments of soil quality. Thus a comprehensive evaluation was made of soil quality based on quality changes from 1982 to 2005 in Wanzhou District of Chongqing and the characteristics of soil quality evolution were clarified. On the one hand, organic matter in the soil increased over the period, and the comprehensive quality of the soil improved. The proportion of the land with low or medium fertility dropped and that of good-quality land increased. Where dryland changed into orchard or vegetable land or was fallowed, an improvement in soil quality was noticed. On the other hand, acidification of soil was intensified and uneven distribution of nutrients in the soil was observed. The proportion of top-class soil decreased. Based on the factors for the above-mentioned evolution trends, the authors proposed some measures for the realization of sustainable soil utilization.
出处
《西南农业大学学报（自然科学版）》
CSCD
北大核心
2006年第2期236-239,274,共5页
Journal of Southwest Agricultural University
基金
教育部科学技术研究重点资助项目(03142)
西南大学博士基金资助项目(2003-18)
关键词
土壤单指标指数
土壤综合质量
土壤质量变化
可持续利用
single factor index
comprehensive quality
changes in soil quality
sustainable utilization
