Evaluation On The Suitability Of Tree Species And The Value Of Ecological Service Function Of Artificial Eco-economic Forest In Yili River Valley

In this study,the artificial eco-economic forest in Yili River valley was used to collect the main afforestation tree species and its ecological characteristics were analyzed by the method of field investigation and data collection.Expert scoring method combined with mathematical model was used to analyze and evaluate the suitability of each tree species,and artificial regionalization combined with Bayesian discrimination was used to regionalize the imported tree species.The ecological service function value and direct economic value of artificial ecological economic forest in Yili River Valley are calculated by using millions of mu ecological economic forest as sample,and the following conclusions are drawn:(1)According to the results of investigation,32 species of main afforestation trees were selected,belonging to 14families and 23 genera,among which 11 species were mainly 5 families,10 genera and 11 species,including Malus pumila,Armeniaca vulgaris,Vitis vinifera and so on.There are 3 families,3 genera and 7 species of tree species in ecological protection forest,including Populus alba var.pyramidalis and Elaeagnus angustifolia,and there are mainly 8 families,11genera and 13 species of landscaping tree species,including Fraxinus sogdiana,Quercus robur,Ulmus laevis and so on.(2)The results of the evaluation of the suitability of each tree species showed that the economic forest was suggested to select Malus pumila,Armeniaca vulgaris and Vitis vinifera as the main planting species,Prunus domestica,Rubus idaeus and Corylus heterophylla could be used as experimental and popularized tree species;It is suggested that Populus alba×P.Bolleana and poplar should be selected as the main planting species in the timber forest.Considering the economic cost,the P.×canadensis‘Sacran-79’can also be selected as low-grade wood cultivation,while the high-end wood should be cultivated with Fraxinus sogdiana,and Quercus robur,and the shelterbelt forest should use Populus alba×P.Bolleana,Populus alba var.pyramidalis;the garden greening suggests to choose Fraxinus sogdiana.,Quercus robur,Ulmus laevis,Fraxinus americana,Betula platyphylla,Fraxinus mands churica,Persica davidiana and Platanus orientalis as the key note tree species,at the same time,can match the Crataegus pinnatifida‘Hongguo’,Swida alba,Padus wilsonii virginiana,ecologically adaptable shrubs and small trees with thick purple leaves.(3)Yining,Yining,Qapqal and Huocheng was Rubus idaeus,Prunus domestica,Cerasus pseudocerasus,Corylus heterophylla,Juglans nigia,Populus alba×P.bolleana suitable area,Gongliu county was Cerasus pseudocerasus,Populus alba×P.bolleana,Juglans nigia suitable area,Rubus idaeus,Corylus heterophylla,Prunus domestica secondary suitable area.Xinyuan County is a suitable area for Prunus domestica,Populus alba×P.bolleana,Juglans nigia,Corylus heterophylla,Cerasus pseudocerasus,and Rubus idaeus.Nilka County was a sub-suitable area for Prunus domestica,Cerasus pseudocerasus,Juglans nigia,Populus alba×P.bolleana,Rubus idaeus,Corylus heterophylla;Tex County for Populus alba×P.bolleana suitable area,Rubus idaeus,Prunus domestica,Juglans nigia,Corylus heterophylla,Juglans nigia,and Zhaosu County for Cerasus pseudocerasus.The sub-suitable area of Juglans nigia,Rubus idaeus,Prunus domestica,Cerasus pseudocerasus,Corylus heterophylla,Populus alba×P.bolleana unsuitable area.(4)The total value of millions of mu ecological economic forest is 15.47×10~9yuan.The value of ecological service is3.65×10~9yuan and the direct economic value is 11.82×10~9yuan.The indexes of ecological service function were forest protection function>carbon sequestration and oxygen release>purifying atmosphere>conservation soil>biodiversity conservation>accumulation of nutrients,fruit value of direct economic value was 11.56×10~9yuan.The value of wood is2648×10~9yuan.