Analysis Of Influencing Factors On Cultivated Land Production Capacity Based On Structural Equation Model

Food security is an important guarantee of national security and social stability.As a country with a large population,China has always put food security issues first.Cultivated land is the foundation of grain growth.The state has always attached great importance to the protection of cultivated land,and has issued a series of protection policies,such as the red line of cultivated land protection,the delineation of basic farmland,etc.,to ensure the quantity and quality of cultivated land.However,the fact that the quality of arable land is low and the per capita arable land area is small cannot be changed,and as the urbanization process accelerates,arable land resources will be encroached,which poses a great threat to my country's food security.Under the circumstance that it is difficult to increase the cultivated land area,increasing the grain production capacity per unit area of cultivated land is an important way to ensure food security in my country.The productivity of cultivated land is a complex process of cultivated land formation,and it is the result of interaction and mutual influence among multiple influencing factors.In this paper,the influencing factors of cultivated land productivity are analyzed,and the key factors affecting cultivated land productivity are revealed scientifically,which is of great significance for improving cultivated land productivity and ensuring national food security.As a large agricultural province,Jiangxi Province is one of the important grain producing areas in China.The analysis of the factors affecting the productivity of different landform types in Jiangxi Province is of great significance to increase the productivity of regional cultivated land.This paper takes Yugan County,Gao'an city and Xingguo County as the research area,aiming at the analysis of the influencing factors of cultivated land productivity,on the basis of cultivated land productivity accounting,using the Structural Equation Model,constructs the interaction model between potential variables and potential variables,potential variables and observation variables,and analyzes the multi factor comprehensive impact of regional cultivated land productivity.It clearly reveals the main driving factors and their influence path and degree.The results show that:(1)For the influence factor model of cultivated land productivity in yugan county,except Hypothesis 4 in the initial model,the other 6 assumptions are all valid.Farmland water conservancy,soil properties and soil nutrients all have a significant direct impact on the productivity of cultivated land.The path coefficient of impact is 0.24,0.16 and 0.21 respectively.Through the intermediary effect of soil nutrients,farmland water conservancy and soil properties also have an indirect effect on the productivity of cultivated land.The indirect effect is 0.067 and 0.053.Geoscience characteristics do not directly affect the productivity of cultivated land,but have a significant positive impact on soil nutrients,thus indirectly affecting the productivity of cultivated land,the indirect effect is 0.053.The slope of farmland has a reverse effect on the productivity of cultivated land.(2)For the influencing factor model of cultivated land productivity in Gao'an City,except Hypothesis 4 in the initial model,the other 6 assumptions are all valid.Farmland water conservancy,soil properties and soil nutrients are the main factors affecting farmland productivity,which have a significant direct impact on farmland productivity.The path coefficient of impact is 0.23,0.26 and 0.55.Farmland water conservancy and soil properties also have an indirect effect on farmland productivity through the intermediary effect of soil nutrients,and the indirect effects are 0.179 and 0.131 respectively.There is no direct effect of geoscience characteristics on cultivated land energy,but indirect effect on cultivated land productivity through soil nutrients.The effect is 0.276.The slope of farmeland still has a negative effect on the productivity of cultivated land.(3)For the influencing factor model of Xingguo County,except Hypothesis 7,the other 6assumptions are all valid.Farmland water conservancy,soil properties,soil nutrients and geoscience characteristics all have a significant direct impact on the productivity of cultivated land.Among them,farmland water conservancy and soil properties also have an intermediary effect on soil nutrients,which has an indirect impact on the productivity of cultivated land.Geoscience characteristics have a significant direct impact on the productivity of cultivated land,and the observation variable of field slope has a reverse effect on the productivity of cultivated land.There is a strong correlation between farmland water conservancy and geoscience characteristics.(4)The total effect of each influencing factor on the productivity of cultivated land in descending order is: Yugan County,farmland water conservancy(0.335)> soil properties(0.223)> soil nutrients(0.221)> geological characteristics(0.053);Gaoan City,Soil nutrients(0.545)> farmland water conservancy(0.414)> soil properties(0.39)> geological characteristics(0.276);Xingguo County,farmland water conservancy(0.494)> soil properties(0.308)> soil nutrients(0.248)> geological characteristics(0.209).In the three research area models,the dominant influence factors and degree of influence of cultivated land productivity are different,and the influence path is also different.The dominant factor of cultivated land productivity in Yugan county and Xingguo County is farmland water conservancy,and the dominant factor in Gao'an county is soil nutrient.The influence path of geological characteristics on cultivated land productivity varies greatly among different models.(5)There are regional differences in the productivity of cultivated land.From the perspective of the productivity of cultivated land in the three study areas in this paper,Yugan county has the highest productivity,Xingguo County has the lowest productivity,and Gao'an city is in the middle.From the perspective of geographical location,the productivity of cultivated land is gradually decreasing from north to south.From the perspective of geomorphology,the three study areas are plain area,hilly area and mountain area from north to south.Therefore,it can also be considered that the productivity of cultivated land is gradually reduced from plain area to mountain area.