Evaluation And Analysis On The Implementation Of Land Remediation In Dryland Modified Paddy Field

Land remediation is an important measure to guarantee the total balance of cultivated land quantity in our country at present,and it is also the support of ensuring food security and new rural construction.Land remediation can optimize the structure of land use and improve the efficiency of land use by transforming the land use mode,and also change the landscape pattern of cultivated land.Analyzing the characteristics of landscape pattern in the remediation area and obtaining the influence on the landscape pattern of the research area before and after the remediation,this paper takes the project scale as the research scale,selects the characteristic index to construct the ecological suitability evaluation model,analyzes and evaluates the landscape change situation and the suitability analysis of the dryland reform Paddy Land remediation project,puts forward the corresponding countermeasures and suggestions.It provides theoretical guidance and support for the planning,design,completion and later management of land remediation projects in landscape pattern optimization in the future.This paper selects the cultivates project in Shanggao County Village,Yichun,Jiangxi Province as the research area,first selects the plaque type horizontal index plaque quantity(NP),plaque density(PD),the maximum plaque in the landscape area proportion(LPI),Landscape shape Index(LSI)and the aggregation index(AL)in the landscape level index in the landscape pattern index.The research results of this paper are as follows:(1)Analysis of landscape pattern characteristics of cultivated landThrough the analysis of the five landscape pattern indexes before and after the remediation of dry land,the effect of remediation on the three indexes of plaque number(NP),plaque density(PD)and landscape shape index(LSI)is not ideal before remediation.In view of the purpose of land remediation in order to achieve rational planning of land plots and large-scale cultivation,the landscape pattern has certain damage;the ratio of the largest plaque to landscape area(LPl),aggregation index(Al),and remediation is better than drought.The effect before the water remediation is more ideal.The land remediation changes the shape of the field in the area,so that the size of the field is basically within the same range,except that the shape of the boundary of the area is irregular,and the shapes of the other fields are rectangular,and the distribution of the field More concentrated,the aggregation index increased.(2)Evaluation on the implementation of land remediation in dryland modified paddy fieldThrough the calculation of the evaluation model of land remediation,it is divided into 6.34 points before the regulation,which belongs to the general score range,and is divided into 7.37 points after the rectification,which belongs to the good score range.It shows that the overall level after the implementation of cultivates land regulation has been improved,but the effect is not very significant,and some countermeasures need to be further improved.From the point of view of land landscape pattern Index,the overall improvement of 3.5189 to 3.5690 points is not obvious,there is still a certain room for improvement,from the point of view of land quality,the score does not improve,but the slope in the development of land leveling after the reduction of 0.16°,Land use,such as the improvement of 0.2 after remediation,the overall improvement is not obvious,there is a lot of room for improvement,improve the quality of land through the reduction of slope and improve land use and so on have this great relationship;From the point of view of land accessibility,0.4895 to 1.4685 points indicate that the remediation of land is significantly improved,road accessibility from 31.46 % to 91.86%,irrigation and drainage degree from 41.08% to 94.39%,improve land accessibility is the key factor to improve the efficiency of cultivated land and crop yield.(3)Suggestions and countermeasures for optimizing the layout of dryland remediation planningBased on the analysis of the evaluation results of the improvement of paddy field remediation in drylands,this paper further improves the overall level of land improvement,realizes the unified coordination and sustainable good development of the remediation area,and puts forward the following four suggestions and countermeasures: 1)Scientific planning and design scheme;2)Pay attention to the improvement of land quality;3)To enhance the understanding of landscape ecology;4)Strengthen the maintenance and supervision of land remediation.