Evaluation On Typical Farmland Protection Forest Benefits On Carbon In AoHan Chifeng

This paper taking Huanghuadianzi small watershed in Ao Hanqi of Chifeng city as the research object,on the premise of a full investigation on different site conditions and different shelterbelt vegetation types in the basin,choosing typical farmland shelterbelts (size of300*400m) which has been planted and accounted for the largest proportion in Huanghuadianzi small watershed in Ao Hanqi of Chifeng,the biomass,production and carbon storage of different structure configuration of typical farmland shelterbelt in the small watershed has been analysed.the optimal allocation pattern of different structure configuration of typical farmland shelterbelt in the small watershed has been analysed, so that the carbon sink of typical farmland shelterbelt in the small watershed has been reached.The purpose of this paper is to provide a scientific basis for the ecological environment construction of Northeast of Inner Mongolia,to supply a more scientific guidance for further development of afforestation carbon sequestration policies,to offer a good case study and scientific basis for negotiation which the government to participate in international climate changes.The contents of research are as follows:(1) In this section,crop biomass,carbon storage and soil carbon storage of farmland shelterbelt of three different forest shelterbelt porosity was analyzed.obtained after the study:the weighted average of F1mode of the maize biomass is the largest,compared with Flmode.the weighted average of F2mode and F3mode reduce0.98and0.96times respectively, the weighted average of F1mode of the maize carbon storage is the largest,compared with F1mode.the weighted average of F2mode and F3mode reduce0.99and0.97times respectively.In the0-100cm soil carbon reserves of different sites of three different structural configuration.the weighted average of Fl mode is the largest.compared with F1mode,the weighted average of F2mode and F3mode reduce0.95and0.91times respectively.Analysis of variance indicated that,the protection effect of grid pattern of three different configuration is F1>F2>F3,the protection effect of F1grid pattern is the most obviously, the F1mode is the optimal model grid.(2) In this section.the growth of poplar forest structure, biomass, carbon storage of F1model of optimal allocation model has been analysed,the result shows:to the height growth of0-36a poplar of F1model of Chifeng.0～9a poplar tree enter into the fast growing period of tree height,10～16a slow into the near mature period of height growth.Diameter growth rapidly in afforestation of15years ago.From the volume growth of poplar, young stage of protection forest of poplar is0-9a, It grows slowly.10-19a as fast-growing stage of protection forest of poplar and volume growth mainly concentrated in this period.In addition,Different diameter class of poplar biomass is trunk>branch>root>leaf. The total biomass is124.4kg.m-2,carbon storage is63.3kg.m-2.(3)In this section,carbon sink of the optimal allocation model of F1model and non farmland shelterbelt in the model has been analyzed.The result shows:The total biomass of F1model increases8times compared with the control value. From the aspects of carbon content:Panicle> stem> leaf> root, The total carbon reserves of F1mode compared with the control value increases10times. The vertical distribution of the maximum value of soil carbon content of F1grid model for the carbon content is the solum of0～10cm,the minimum value is60-100cm carbon content, the total carbon content of farmland soil Fl compared with the control value increased by1.24times.