Management Models And Comprehensive Benefit Evaluation Of Pecan Agroforestry

Agroforestry system has important theoretical basis and application value in improving ecological environment,ensuring production safety and promoting social economy.However,with the rapid development of rural social economy,how to improve the resource utilization efficiency of agroforestry system,so as to promote energy conservation and emission reduction,and develop circular economy is still an urgent problem for agroforestry system in plain and hilly agricultural areas.In Jianghuai Hilly region,the pecan agroforestry system as the research object,from the agroforestry system research present situation,the development process of forest,soil nutrient and comprehensive benefit evaluation aspects,in-depth investigation of the actual operation and benefit situation,adopt qualitative analysis and quantitative determination method,combining the interspecific relationship between complex system and soil physical and chemical properties such as analysis,using the analytic hierarchy process(ANP)to build composite system versatility evaluation system of forest,in Jianghuai Hilly pecan agroforestry system management situation has carried on the comprehensive benefit evaluation.The results are as follows:(1)In the pecan agroforestry system,tree density(Planting point arrangement)has a significant impact on the growth of the composite system.The larger the row spacing,the better the seedling growth and crop benefits,the best composite age of pecan agroforestry system is 4-5 years.(2)The pecan agroforestry compound can improve the soil physical and chemical,compared with the control group,the composite system can increase soil water content by 20%-50%,decrease soil bulk density by 1%-7%,and increase soil total nutrient(N,P,K)and regulating soil pH.(3)The comprehensive benefit of four pecan agroforestry evaluation,and their ecological benefits were ranked as follows:agroforestry model(0.782)>forest seedling model(0.763)>forest grass model(0.634)>forest medicine model(0.578);economic benefit ranking is forest seedling model(1.340)>agroforestry model(0.174)>forest grass model(0.005)>forest medicine model(-0.033);social benefit ranking is:agroforestry model(1.231)>forest seedling mode(1.203)>forest medicine model(0.979)>forest grass model(0.909);comprehensive analysis and evaluation ranked as seedling mode(3.307)>forestry model(2.106)>forest grass model(1.538)>forest medicine mode(1.524).