摘要
【目的】以沈阳市为研究区域,评价其耕地提质改造潜力,以期提升耕地质量等别和生产能力,落实耕地占补平衡制度,更有效地保障国家粮食安全。【方法】基于农用地分等成果,运用主成分分析法和专家打分法构建了涵盖分等因素改良可行性和分等指数临界状态两个评价维度,包含限制因子数量及限制程度、分等指数与上一等耕地分等指数差值两个评价指标的耕地提等潜力评价模型;采用综合因子得分法与限制性因子判定结合法测算了耕地提等潜力,划分耕地提等潜力区域,并识别耕地提等主导限制因子,确定耕地整治类型。【结果】沈阳市耕地提等高潜力区面积为10849.72 hm^(2),仅占总面积的1.37%,主要分布在新民市;中潜力区面积为106990.79 hm^(2),占总面积的13.49%;低潜力区和无潜力区面积分别为384595.93 hm^(2)和290536.32 hm^(2),两者占总面积的85.14%,耕地提等主导限制因子有排水条件、有效土层厚度等。【结论】沈阳市耕地质量提等潜力不大,在中、高潜力区可通过工程措施改良有效土层厚度、排水条件等限制因子推动耕地提等工作。
[Objective] Taking Shenyang city as the study area, the potential of cultivated land quality improvement and transformation is evaluated, with the views of improving the quality grade and productivity of cultivated land,implementing the balance system of cultivated land occupation and supplement, and ensuring national food security more effectively. [Method] The cultivated land improvement potential evaluation model was constructed based on the results of agricultural land grading, using the principal component analysis and experts scoring method, which included two evaluation dimensions(the feasibility of improvement of grading factors and the critical state of grading index), and two evaluation indices(the number and degree of limiting factors, and the difference between grading index and upper grading index of cultivated land). The comprehensive factor score method and restriction factor determination method were used to estimate the potential of cultivated land quality improvement, to divide the potential areas of cultivated land quality improvement, to identify the leading limiting factors of cultivated land quality improvement, and to determine the cultivated land regulation type. [Result] The results showed that the high potential area was 10849.72 hm^(2), accounting for only 1.37% of the total area, mainly distributed in Xinmin. The moderate potential area was 106990.79 hm^(2), accounting for 13.49%. The areas of low potential and no potential were 384595.93hm^(2) and 290536.32 hm^(2), accounting for 85.14%. The results showed that the area of high potential cultivated land improvement area in Shenyang was 10849.72 hm^(2), only accounting for 1.37% of the total area, mainly distributed in Xinmin. The area of medium potential area is 106990.79 hm^(2), accounting for 13.49% of the total area. The areas of low potential area and no potential area were 384595.93 hm^(2) and 290536.32 hm^(2) respectively, accounting for 85.14%of the total area. The main limiting factors were drainage condition and effective soil thickness. [Conclusion] The potential of cultivated land quality improvement in Shenyang is not large. In medium and high potential areas,engineering measures can be taken to improve the effective soil thickness, drainage conditions and other limiting factors to promote cultivated land quality improvement.
作者
董秀茹
潘翀
刘强
刘伟
DONG Xiu-ru;PAN Chong;LIU Qiang;LIU Wei(College of Land and Environment,Shenyang Agriculural University,Shenyang 110866,China;College of Economics Managemenl,Shenyang Agriculural University,Shenyang 110866,China;Tai'an County Natural Resources Affairs Service Center,Taian 114100,China)
出处
《土壤通报》
CAS
CSCD
北大核心
2022年第4期787-794,共8页
Chinese Journal of Soil Science
基金
沈阳市规划设计研究院有限公司委托项目(H2021101)资助。
关键词
耕地质量
耕地提等
潜力评价
Cultivated land quality
Cultivated land utilization quality grade improvement
Potential evaluation
