Comprehensive Benefit Analysis Of Haloxylon Ammodendron Ecological Forest At Different Years In The Aiding Lake Basin

Desertification is an objective and realistic problem impacting the development of Aiding Lake Basin.At present,the Haloxylon ammodendron forest inoculated with Cistanche has established a protective forest system in the Aiding Lake Basin with significant benefits.However,the research on ecological benefit,economic benefit and comprehensive benefit evaluation of this planting model in Aiding Lake basin is relatively weak.Taking planted five year old Haloxylon ammodendron forest,and inoculated with Cistanche on planted three year old and annual Haloxylon ammodendron forest,and native desert as samples in the North of Aiding Lake,the ecological and economic benefits of Haloxylon ammodendron forest were measured during the whole growing season.The main results are as follows:(1)Haloxylon ammodendron forest increased soil moisture content and porosity,and was more reasonable in temporal and spatial distribution.The soil organic matter in the four test sites did not differ much.After the end of the growing season,the coverage of Haloxylon ammodendron had significantly increased.However,the increase in vegetation height was not much different.The biological diversity,roughness,and wind proof benefit of Haloxylon ammodendron increased significantly after the end of the growing season.During the growing season,the air temperature of Haloxylon ammodendron forest was lower than that outside the forest and the forest maintained relatively high humidity.The air humidity of the Haloxylon ammodendron inoculated with Cistanche was greater than the five year old Haloxylon ammodendron.(2)In terms of afforestation costs,five-year tending costs,and benefits of forest products,they were as follows:annual Haloxylon ammodendron>three year old of Haloxylon ammodendron>five year old Haloxylon ammodendron.The net economic benefits within five years of annual Haloxylon ammodendron was 238,237.00 yuan/hm2,The net economic benefits within five years of three year old Haloxylon ammodendron was 212,671.50 yuan/hm2,and the net economic benefits within five years of five year old Haloxylon ammodendron was negative.The cash recovery period of Haloxylon ammodendron inoculated with Cistanche was 3 years,and each year after Haloxylon ammodendron forestation,there was a stable forest product economic return(86175.00-94119.00 yuan/hm2).(3)On the basis of the evaluation of ecological benefits and economic benefits,Analytic hierarchy process was used to establish the evaluation index system.The data was dimensionlessly processed by SPSS software to determine the weight coefficients of each index and conduct comprehensive evaluation.Comprehensive benefit score:three year old Haloxylon ammodendron(37.00)>annual Haloxylon ammodendron(40.94)>five year old Haloxylon(21.90).The best comprehensive benefit is the three year old Haloxylon ammodendron within Cistanche.