Research On The Assessment Of The Function Of Cultivated Land And Farmers' Livelihood Capital And Their Interrelationship In Karst Area

Karst areas has a fragile ecological environment,bad the natural conditions,insufficient the per capita cultivated land,and arduous task of poverty alleviation.The multi-functional and coordinated utilization of regional space of land and farmers' livelihood in this areas has become a hot issue in the current academic circles.The main purpose of this study is to objectively evaluate the function of cultivated land and farmers' livelihood capital in Karst areas,and to further explore the relationship between the function of cultivated land and farmers' livelihood capital in Karst areas.this study takes Huanjiang County as an example;to use the data of social economy from 1990 to 2015,land use,poor farmers whose records have been established and field investigation in Huanjiang County,and the main contents include three aspects:firstly,the evaluation index system of cultivated land function is constructed,and the spatial and temporal characteristics of cultivated land function and its influencing factors are analyzed by analytic hierarchy process(AHP)and comprehensive index method;secondly,the evaluation index system of farmer's livelihood capital is constructed,and the spatial characteristics of farmer's livelihood capital and its influencing factors are analyzed by entropy method and comprehensive index method;finally,using coupling coordination degree model analyzes the coupling and coordination relationship between cultivated land function and farmers' livelihood capital,and grey correlation degree is used to analyze the impact of farmers' livelihood capital on cultivated land function,and The interaction mechanism between farmland function and farmers' livelihood capital in Karst areas under the framework of sustainable livelihood analysis is proposed.The main conclusions are as follows.(1)In the evaluation of cultivated land function,the evaluation indexsystem of cultivated land function in Huanjiang County was constructed based on the theory of ecosystem services.The results show that: 1)the comprehensive function of cultivated land in Huanjiang County changed significantly and showed an upward trend from 1990 to 2015,and the growth rate increased first,then slowed down and then increased;2)the spatial distribution of cultivated land function in Huanjiang County was coupled with the topography of north-high-south-low,mountains around and hills in the middle,which mainly showed that the high value areas of the comprehensive and supply function of cultivated land were distributed in the central and south and in the large and small river valleys,and the high value areas of regulation function of cultivated land were distributed in the northeast and southeast,and the spatial distribution of the support function and cultural function of cultivated land shows the characteristics of high around and low in the middle;3)Natural conditions,social and economic development level and system(public policy)have obvious influence on the spatial distribution of cultivated land function.(2)In the evaluation of farmers' livelihood capital,the evaluation index system of farmers' livelihood capital is constructed based on the theory of sustainable livelihood analysis.The results show that: 1)The high value areas of farmers' total livelihood capital in Huanjiang County are mainly located in the low poverty areas mainly in hilly areas in the south,and the low value areas mainly in the high poverty areas mainly in mountainous areas in the north.The low value areas of human capital are mainly concentrated in the southeast of the higher degree of rocky desertification,and the high value areas of social capital are mainly located in the southwest and southeast of the higher degree of rocky desertification.Natural capital is low as a whole.The low value areas of material capital are mainly located in the northern high altitude areas,while the high value areas of financial capital are mainly concentrated in the southwestern part with high degree ofrocky desertification.2)Natural and economic location conditions and system(public policy)factors have a greater impact on the spatial distribution of farmers' livelihood capital.(3)In the study of the relationship between cultivated land and farmer's livelihood capital,the results show that: 1)There is a coupling relationship between cultivated land function and farmer's livelihood capital in Huanjiang County,but the level of coupling is not high,and the degree of coupling coordination is still in the stage of development;2)farmer's livelihood capital has a significant impact on cultivated land function,of which human capital has the most obvious impact on the comprehensive function of cultivated land,followed by material capital,financial capital and social capital,and while natural capital has the weakest impact on the comprehensive function of cultivated land.3)In the interaction mechanism between the function of karst cultivated land and farmers' livelihood capital,(1)the inherent disadvantage of natural conditions is the fundamental reason for the insufficiency of cultivated land function and the fragility of farmers' livelihood capital;and(2)social and economic development(the diversification of farmers' livelihood strategies)promotes the development of cultivated land function to meet the increasingly rich needs of farmers;(3)the positive intervention of public policy is the coordination and adaptation of cultivated land function and livelihood capital.