A Case Study of Yanchuan County,Shaanxi Province.Evaluation of Cultivated Land Quality in the Loess Plateau[J].Research of Soil and Water Conservation,2021,28(02):375-381.
黄土高原区耕地质量评价——以陕西省延川县为例
- Title:
- Evaluation of Cultivated Land Quality in the Loess Plateau
- 文章编号:
- 1005-3409(2021)02-0375-07
- Keywords:
- cultivated land quality; index system; the Loess Plateau; Yanchuan County of Shaanxi Province
- 分类号:
- F323.21; F301.21
- 文献标志码:
- A
- 摘要:
- 为进一步验证自然资源部《耕地质量调查监测评价(试用稿)》中评价指标体系的科学性和合理性,选择陕西省延川县作为黄土高原区指标体系应用试点,以便科学制定符合黄土高原区的耕地质量评价指标体系。采用纵横对比法,依据改进前后的指标体系进行耕地质量评价,结合区域实际情况和评价结果精确性,提出指标体系的改进意见。结果表明:(1)纵向对比指标体系改进前后的耕地质量指数,其面积加权平均值由19.09增加到19.49,改进前后的耕地质量指数与国家自然等指数的最优相关系数由0.80增加到0.88;(2)横向对比指标体系改进后的耕地质量指数归一化值和国家自然等指数归一化值,差距值为-0.38～0.60;(3)延川县耕地质量指数为16.89～26.28。改进后的耕地质量评价指标体系能够更好地反映延川县耕地质量状况,有利于建立符合黄土高原区的耕地质量评价指标体系。
- Abstract:
- To further verify the scientificity and rationality of the evaluation index system identified in the ‘Cultivated Land Quality Investigation, Monitoring and Evaluation(Trial Draft)' of the Ministry of Natural Resources, Yanchuan County of Shaanxi Province was selected as the pilot for the index system of the Loess Plateau, so as to scientifically formulate the evaluation index system of cultivated land quality in the Loess Plateau. The longitudinal and horizontal contrast method were used to evaluate the quality of the cultivated land according to the index system before and after improvement, the improvement suggestions of the evaluation index system were proposed based on the characteristics of the regional cultivated land quality and the accuracy of the evaluation results. The results show that:(1)the area weighted average value of the cultivated land quality index increased from 19.09 to 19.49 through longitudinally comparing the cultivated land quality index before and after the improvement of the index system; the correlation between the cultivated land quality index before and after the improvement and the national natural index was analyzed, the optimal correlation coefficient increased from 0.80 to 0.88;(2)by contrasting the normalized value of the cultivated land quality index and the national natural grade index after the improvement of the horizontal comparison index system, the gap value was between -0.38 and 0.60;(3)the quality index of cultivated land in Yanchuan County was between 16.89 and 26.28. The results show that the improved evaluation index system of cultivated land quality can better reflect the quality of cultivated land in Yanchuan County, and is conducive to establishing an evaluation index system of cultivated land quality in line with the Loess Plateau.
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备注/Memo
收稿日期:2020-06-05 修回日期:2020-06-16
资助项目:国家社科基金重大项目(19ZDA096); 国家自然科学基金(41771561,41801210); 其他部委项目(20180405)
第一作者:陈文广(1997—),男,湖南岳阳人,硕士研究生,研究方向为土地资源可持续利用。E-mail:s20193030516@cau.edu.cn
通信作者:孔祥斌(1969—),男,河北承德人,教授,博士,主要从事土地资源评价、利用与保护研究。E-mail:kxb@cau.edu.cn