| Under the double pressure of climate change and human activities,the water resources in the watershed are in serious shortage,which leads to the structural degradation and function loss of wetland ecosystem,and the regional ecological environment problems are serious.According to the theory of human-land relationship in geography,scientifically implementing the ecological protection and restoration project of mountains,rivers,forests,fields,lakes,grass and sand by using the technical means of ecological restoration projects is the only way for my country to build ecological civilization,and it is also the only way to solve ecological environment problems and achieve carbon peaks.One of the important initiatives for carbon neutrality.This article choose in the ecological rehabilitation region of Inner Mongolia agriculture and animal husbandry ecological demonstration base as the research object,the ecological restoration land(ERL),grassland(GL),arable land(AL)on soil physical and chemical properties,the system to carry out ecological restoration on the analysis of the effect of soil improvement and constructing evaluation index system of benefit of ecological restoration,To maximize the value of ecological services.The exploration of ecological restoration path and small watershed governance model provides important reference for the design and implementation of ecological restoration of degraded wetlands.And it is conducive to the exploration of a good development path for ecological civilization construction.The main conclusions are as follows:(1)Soil bulk density of ERL,GL and AL increased with the increase of soil depth,and ERL was the smallest and AL was the largest,but the differences were not significant.ERL,GL and AL were mainly composed of silt,very fine sand and fine sand,and the silt content was the largest.ERL sand content decreased,while silt and clay content increased.At the same time,K values of ERL soil erodibility are lower than GL and AL.The physical structure of soil in the ecological restoration area was significantly improved,the bulk density decreased,the fine particle composition increased,and the erodibility K value decreased.(2)The soil p H values of ERL,GL and AL ranged from 7.0 to 7.64,7.24to 7.81,and 7.53 to 8.02,respectively;The soil organic carbon content of ERL is 2.1%?2.39%,which is 0.22%?0.28%higher than GL,and 0.32%?0.49%higher than AL;Compared with GL,the total nitrogen,total phosphorus and total potassium of ERL soil increased by 29.51%,26.09%and 8.72%respectively,and the total nitrogen and total potassium of ERL soil increased by 29.51%and 8%compared with AL;Compared with GL,the contents of alkaline hydrolyzed nitrogen,available phosphorus and available potassium in ERL soil were increased by 26.85%,7.7%and 43.18%,and were increased by129.15%,3.36%and 8.95%compared with AL.The soil chemical properties in the ecological restoration area were significantly improved,and the soil p H value showed a decreasing trend,which was close to neutral,while the contents of organic carbon,total nitrogen,total phosphorus,total potassium,alkali-hydrolyzed nitrogen,available phosphorus and available potassium increased compared with GL and AL.(3)The demonstration base currently has 2.1,10.5,2.1,9 and 4.46 hm~2of spruce,pine,golden red apple,mountain apricot,elm and poplar,respectively.The quantitative results of ecological benefits show that the values of soil conservation,carbon fixation and oxygen release,air purification,water conservation,and ecological product values are:2,853,100 yuan/a,191,100yuan/a,102,900 yuan/a,13,400 yuan/a,12,200 yuan/a,so the total economic value of ecological benefits of the demonstration base is as high as 3,172,700yuan/a. |
PDF Full Text Request