Research On Evaluation And Zoning Protection Strategy Of Dengzhou Country’s Arable Land Quality

"Maintaining stable grain production requires protecting arable land." Arable land is the foundation of agriculture and food production.Since the reform and opening-up,China has undergone a three-pronged approach to arable land protection,emphasizing quantity,quality,and integration.Currently,while the quantity of arable land in China is relatively stable,issues such as declining arable land quality,low crop quality,and significant regional differences in arable land quality persist.Therefore,evaluating arable land quality based on a regional and demand-based evaluation system,and using the evaluation results to divide arable land,proposing differentiated arable land utilization and protection recommendations based on actual situations,is essential for comprehensively and systematically improving regional arable land quality.This study first analyzed the spatiotemporal evolution trend of arable land utilization in Dengzhou Country from 2011 to 2020 and clarified the current status of arable land utilization and protection in Dengzhou Country.Then,based on the arable land plot in Dengzhou Country,a quality evaluation index system was developed from the perspective of natural arable land quality and site conditions to calculate the arable land quality index of administrative villages.The quality index was subjected to spatial autocorrelation analysis,and the results of the evaluation and spatial autocorrelation analysis were used to define the protection zoning types.Finally,based on the results of the arable land quality evaluation and zoning,and the non-grain and non-agricultural situations within the zones,differentiated zoning protection strategies were proposed.The conclusions of this study are as follows:(1)The arable land area in Dengzhou Country gradually decreased,with a decreasing rate that was fast in the initial years but slowed down later.Meanwhile,the arable land utilization efficiency in Dengzhou Country continues to improve;non-grain and non-agricultural trends are also becoming more and more evident.(2)The comprehensive arable land rating in Dengzhou Country ranges from 62 to 98.2,mainly in the range of 81-90 points,accounting for 72.38%of the arable land area.(3)The spatial autocorrelation results of the arable land quality index in Dengzhou Country show that there are four types of significant spatial distributions:HH(high-high),LL(low-low),HL(high-low),and LH(low-high).The most common type of significant spatial distribution is the LL(low-low)type,accounting for 17.1%,while the least common type is the LH(low-high)type,accounting for 11.3%.(4)The administrative village was used as the evaluation unit to divide Dengzhou Country into four protection zones:arable land key protection zones,non-agricultural construction ideal zones,comprehensive improvement zones,and moderately adjusted zones.The arable land key protection zone accounted for the lowest proportion at 15.6%and is distributed in the northern and eastern regions and spans multiple townships.The moderately adjusted zone accounted for the highest proportion at 42.8%and is sparsely distributed in most regions.(5)The arable land quality and production capacity of the arable land key protection zone are good and can be considered as a priority area for basic farmland protection,while also paying attention to preventing non-grain development.The moderately adjusted zone has relatively good arable land quality,but lower production capacity,requiring targeted improvement measures to improve comprehensive production capacity.The non-agricultural construction ideal zone should be combined with the regional advantages to carry out ecological tourism and improve local ecological,social,and economic benefits.Arable land in the comprehensive improvement zone should undergo integrated land improvement measures based on local conditions to improve arable land quality and production capacity.