The Relationship Between Cultivated Land Use Transition And Grain Production In Henan Province

In recent years,land use transition has gradually become a research hotspot in land change science.With the acceleration of urbanization and the advancement of rural revitalization strategy,land use transformation has become an important aspect of land use transformation.Based on the land use data and socio-economic data from2000 to 2020 in Henan Province,this paper comprehensively evaluated the relationship between the transformation of cultivated land use and grain production in Henan Province by using the Arc GIS10.8,SPSS and other software,and the methods of transformation matrix,entropy method and coupling coordination degree model.The main conclusions are as follows:(1)In the dominant index of cultivated land use transformation,the amount of cultivated land decreased,and the transformation among different land use types mainly existed between cultivated land and construction land and within cultivated land,and the mechanization level continued to increase.From 2000 to 2020,the total cultivated land area decreased by 4674.02 square kilometers,and the utilization dynamic attitude was-0.21%,the change was relatively flat,and the annual average change range was-222.57 square kilometers.In different elevation levels,the decrease was the largest in the <100 m elevation area,which was2101.49 square kilometers.The level of agricultural mechanization increased significantly,with an increase rate of 76.77%,an increase rate of 61.35% and a contribution rate of 79.91% from 2000 to 2010,and a decrease rate of 9.56% from2010 to 2020.(2)Among the recessive morphological indicators of cultivated land use transition,the non-point source pollution of fertilizer per plot,grain yield per plot,multiple cropping index and effective irrigation ratio showed a continuous increasing trend,while the use of pesticide per plot increased first and then decreased.From 2000 to 2020,the non-point source pollution of fertilizer per field in Henan Province showed a trend of continuous increase,but the increase in the second research period was significantly reduced compared with the first research period,less than 1% of the previous period.The average grain yield increased from 343.95 kg/mu in 2000 to 419.17 kg/mu in 2020.The multiple cropping index increased from 1.21 to1.44,with an increase of 0.23 and an overall increase of 19%.The effective irrigation ratio in Henan Province was 44.12% in 2000,and increased to 48.21% in 2010,with an increase of 4.09%.In 2020,the effective irrigation ratio was 53.31%,with an increase of 5.10%.The use of pesticides on average land increased first and then decreased.From 2000 to 2010,the use of pesticides on average land increased from8.85 kg/ha to 11.72 kg/ha,and from 2010 to 2020,it decreased from 11.72 kg/ha to9.55 kg/ha.(3)Among the indicators of grain production,grain output,per capita grain output and the ratio of grain to economy showed an overall increasing trend,while the proportion of agricultural added value in the added value of agriculture,forestry,animal husbandry and fishery showed a decreasing trend.The grain output in Henan Province has been increasing rapidly from 2000 to2020,showing obvious spatial distribution characteristics.From the perspective of per capita grain output,per capita grain output in Henan Province shows an increasing trend from 2000 to 2020.From 2000 to 2020,the ratio of grain to economy showed an increasing trend,with a total increase of 0.57.The ratio of grain to economy in Henan Province increased from 2.11 to 2.23 in 2000 to 2010,and from 2.23 to 2.68 in 2010 to 2020.The proportion of agricultural added value in the added value of agriculture,forestry,animal husbandry and fishery in Henan Province is decreasing continuously,but the range is decreasing and the speed is also decreasing.(4)The coupling degree and coordination between cultivated land use transformation and grain production decreased.From 2000 to 2020,high coupling area decreased,medium coupling area increased and low coupling area decreased in the transformation of cultivated land use in Henan Province.From 2000 to 2010,there were 200.06 million hectares of highly coupled arable land,and from 2010 to 2020 there were no highly coupled areas.From2000 to 2010,the cultivated land area in the Middle coupling area increased to 6.9915 million hectares,and from 2010 to 2020,it increased to 8.7565 million hectares,with a year-on-year increase of 25.24%.The cultivated land area in the low-coupling area decreased slightly from 1,546,800 hectares to 1,490,700 hectares.From 2000 to 2020,in the relationship between cultivated land use transformation and grain production coordination degree in Henan province,there are 4 disordered cities and 14 coordinated cities;from 2010 to 2020,there are 3 disordered cities and 15 coordinated cities.From the number of coordinated cities,the overall coordination degree of Henan Province has improved slightly.However,in terms of coordination degree,13 cities had moderate coordination degree from 2000 to 2010,and the number decreased to 7 from 2010 to 2020,indicating a decrease in coordination degree.(5)There are 5 types of integrated regions of coupling coordination degree,and optimization strategies are proposed according to different types.From 2000 to 2020,there are five types of coupling coordination degree comprehensive zoning in Henan Province,which are low coupling serious misadjustment zone,low coupling initial misadjustment zone,medium coupling initial coordination zone,medium coupling good coordination zone and high coupling good coordination zone.The high coupling and good coordination areas are mainly distributed in the eastern and southern parts of Henan Province.The initial and good coupling coordination areas are mainly distributed in the northwestern,central and southern parts of Henan Province.The low coupling initial misalignment and low coupling severe misalignment are mainly distributed in the western mountainous area and the provincial capital city(Zhengzhou).This study quantitatively described the transformation of cultivated land use and the characteristics of grain production,and constructed a coupling and coordination model of the two,which could effectively describe the characteristics of the transformation of cultivated land use,reveal the development stage of the transformation of cultivated land use,and clarify the relationship between the transformation of cultivated land use and grain production,so as to provide useful reference for promoting the sustainable development of society,economy and ecological environment and the management of cultivated land use in Henan Province.