Study on the sensitivity of cultivated land multifunction to the changes of grain productivity capacity
The function of cultivated land has undergone extensive and profound changes,from a single grain production function to a multifunction such as social security,ecological protec-tion and landscape culture.Under this context,it is particularly important to analyze the sensi-tivity of multifunctional cultivated land to grain production capacity.Based on the statistical da-ta of 14 prefecture-level cities in Liaoning province from 2005 to 2020,the multifunction of cultivated land and grain production capacity of multifunction zoning were analyzed by using entropy weight method and sensitivity model,and the sensitivity of cultivated land multifunction to the change in grain production capacity was examined.The results are as follows:(1)From 2005 to 2020,the average value of multifunctional index of cultivated land increased,the average value of productive function and social function indexes of cultivated land increased,and the average value of ecological function index of cultivated land decreased.(2)According to the re-sults,there were five multifunctional divisions of cultivated land in the study area in 2020.There are significant differences in grain production capacity among different functional divi-sions,and the response relationships between grain production capacity and various functions of cultivated land is different.(3)From 2005 to 2020,the sensitivity of cultivated land multi-function to the change of grain production capacity showed a downward trend,the sensitivity of cultivated land production function to the change of grain production capacity presented an upward trend,while the sensitivity of cultivated land social function and ecological function to the change of grain production capacity exhibited a downward trend,and the quantitative change of sensitive areas showed certain fluctuations and spatial distribution differences.There-fore,we should further improve the level of multifunctional optimal allocation of cultivated land in Liaoning province,and improve the grain productivity.
multifunction of cultivated landgrain production capacitytemporal and spatial evolutionzoningsensitivity
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