[1]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.
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Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
28
Number of periods:
2021 02
Page number:
375-381
Column:
Public date:
2021-02-06
- Title:
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Evaluation of Cultivated Land Quality in the Loess Plateau
- Author(s):
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—A Case Study of Yanchuan County, Shaanxi Province
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(1.College of Land Science and Technology, China Agricultural University, Beijing 100193, China; 2.Key Laboratory for Farmland Quality, Monitoring and Control, Ministry of Natural Resources, Beijing 100193, China; 3.Yanchuan County Agricultural Technology Extension Center, Yan'an, Shannxi 717200, China; 4.College of Economics and Management, Northwest A&F University, Yangling, Shannxi 712100, China)
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- Keywords:
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cultivated land quality; index system; the Loess Plateau; Yanchuan County of Shaanxi Province
- CLC:
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F323.21; F301.21
- DOI:
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- Abstract:
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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.