Study On Production Potential And Intensive Use Of Cultivated Land In Fenghuang County,Hunan Province

Based on the "ecological region" method,a method for predicting the production potential of county-level land in karst mountainous areas was established.The light and temperature production potential,climate production potential,climate-soil production potential of each township in Fenghuang County were calculated,and the cultivated land of each township in Fenghuang County was comprehensively obtained.Production potential;using the analytic hierarchy process to construct the evaluation index system of cultivated land intensive use in Fenghuang County,combined with the entropy method to determine the comprehensive weight,according to the GIS space-time analysis method,the spatial and temporal analysis of the intensive use degree of cultivated land in Fenghuang County was carried out.Finally,combining the production potential of cultivated land in Fenghuang County,the intensive use of cultivated land and the current situation of cultivated land use,the countermeasures and suggestions for the intensive use of cultivated land in Fenghuang County are proposed.The main conclusions are as follows:(1)The light and temperature production potentials of the seven major food crops are all large.The order of the light and temperature production potentials is rice,wheat,rapeseed,flue-cured tobacco,pea,soybeans,and sweet potatoes.Corn,rapeseed,flue-cured tobacco,pea peas,soybeans,sweet potatoes,potatoes;climate-soil production potential yields are rice,wheat,pea peas,soybeans,sweet potatoes,flue-cured tobacco,and potatoes.Among them,rice has the highest light-temperature production potential,climatic production potential and climatic-soil production potential,which are 15529.12 kg/hm2,11149.9 kg/hm2 and 8399.6 kg/hm2,respectively.(2)The light and temperature production potential of all towns and villages in Fenghuang County is at a relatively high level.There are 1,4,7,6,and 6 towns and villages belonging to Class ?,?,?,?,and ?,respectively.,Accounting for 4.17%,16.67%,29.17%,25%,and 25%of the total number of towns and villages;1,5 towns and villages with climatic production potential belonging to Class ?,?,?,?,and ?,respectively,5,4,and 9 respectively,accounting for 4.17%,20.83%,20.83%,16.67%,and 37.5%of the total number of townships;climate-soil production potential belongs to Class ?,?,?,?,and ? There are 5,8,2,6,and 3 townships,which account for 20.83%,33.33%,8.33%,25%,and 12.5%of the total number of townships.(3)According to the analytic hierarchy process and entropy method,the maximum weight of the agricultural film input in the land intensive use index layer of Fenghuang County is 7.64%,followed by the average labor output value and the irrigation index,both of which are 7.36%,and the least weight is multiple cropping.Index,whose weight is 5.77%,and the order of the comprehensive weights is:agricultural film input(7.64%)>labor output value(7.36%)?irrigation index(7.36%)>agricultural power input(6.89%)>land output value(6.88%)>Safety factor(6.82%)>Farmer's per capita income(6.75%)>Grain yield(6.64%)>Mechanization rate(6.62%)>Land reclamation index(6.56%)>Unit labor input(6.31%)>Pesticides Input(6.30%)>Fertilizer input(6.18%)>Per capita arable land area(5.92%)>Multiple cropping index(5.77%).(4)In the ten years from 2008 to 2017,the overall intensive use level of cultivated land in Fenghuang County showed an upward trend,from 0.2761 in 2008 to 0.8112 in 2017.From 2009 to 2011,the intensive use level of cultivated land showed a slowly increasing trend,especially in 2013.It is actually lower than intensive utilization in 2012.However,after adjustment in 2013,it showed a rapid upward trend from 2014 to 2017.By 2017,the intensive degree of cultivated land use reached its peak.In the intensive use classification of cultivated land,it belongs to the intensive use class ? level from 2014 to 2017,the intensive use class ? level from 2011 to 2013,the intensive use class ? level from 2009 to 2010,and the intensive use class IV level in 2008.In terms of chronological order,the number of Grade ? arable land in Fenghuang County has changed most significantly,from 4.17%in 2008 to 29.1%in 2017.(5)Analysis of the spatiotemporal characteristics of the intensive use of cultivated land in 24 towns and villages in Fenghuang County using the extensive use of cultivated land(2008),moderate intensive use of cultivated land(2013)and high intensive use of cultivated land(2017)as time nodes The intensive use of cultivated land in Fenghuang townships is divided into three levels:?,? and ?.Among them,the townships belonging to the I-level subdivision accounted for 4.17%,20.83%,and 29.17%of the total number of townships in 2013 and 2017,and the townships belonging to the ?-level subregion accounted for 66.67%,58.33%,and 54.17%of the total number of townships,belonging to ?.The townships in these sub-regions accounted for 29.17%,20.83%,and 16.67%of the total number of townships.In summary,the research on the prediction of cultivated land production potential and the evaluation of intensive use of cultivated land in Fenghuang County analyzed the problems existing in the comprehensive evaluation of cultivated land in Fenghuang County.Measures and measures to improve the utilization efficiency of cultivated land in Fenghuang County in various aspects such as land use.