Coupling Relationship Between Ecology Effect And Economy Effect Of Returning Farmland Into Forest Or Grasses

The research divides into six pattern of Returning Farmland into Forest or Grasses and one comparison(not Returning Farmland into Forest or Grasses), based on the difference of planter type,climate background, geological and the soil background in Loess Hilly and Gully Area (Ansai county); Suitable appraisal targets of economical effect and ecology effect of Returning Farmland into Forest or Grasses were determination through investigation and analysis of six pattern of Returning Farmland into Forest or Grasses and one comparison;According to investigation of economic indicator and observation of ecology target in Returning Farmland into Forest or Grasses area, influence of economic indicator for Returning Farmland into Forest or Grasses and comparison, were analyzed using the factor analysis method, as well as each ecology target function which in Returning Farmland into Forest or Grasses area the ecological environment restores;Utilized the coordinated development model to carry on the coupling appraisal to it,and revelation coupling relations of economical effect and ecology effect after Returning Farmland into Forest or Grasses. These studies provide the reference for Returning Farmland into Forest or Grasses project sustainable development.The main conclusions were as follows:(1)Pattern division result: The research divides into six pattern of Returning Farmland into Forest or Grasses and one comparison(not Returning Farmland into Forest or Grasses), based on the difference of planter type,climate background, geological and the soil background in Loess Hilly and Gully Area (Ansai county); six kinds the pattern of Returning Farmland into Forest or Grasses respectively are: The pattern A locust tree and the lemon strip tall fill the mixed forest the pattern of Returning Farmland into Forest or Grasses; Pattern B clover and apple economic forest pattern; The pattern C sea-buckthorn and the alfalfa fill the grass mix plant pattern; Pattern D sea-buckthorn, oriental arbor-vitae and lemon strip bush forest pattern; The pattern E lemon strip, the oriental arbor-vitae and the alfalfafill the grass mix plant pattern; The pattern F sea-buckthorn and the locust tree tall fill mixes hands over the pattern.(2)The economical effect analysis obtains: The economical effect factor synthesis value order is : A>B>F>CK>C>D>E. Pattern A, C,F must the economical effect be better in six kinds patterns of Returning Farmland into Forest or Grasses; Analyses to agricultural income, the non-agricultural income and subsidizes of Returning Farmland into Forest or Grasses in six kind of patterns three aspects to obtain: In the agricultural income pattern A, B, F comparatively are higher than the comparison; In the non- agricultural income pattern C, D, E, F are better to the comparison; In to the subsidy of Returning Farmland into Forest or Grasses in the dependence pattern F to be smallest.(3)Ecology effect analysis demonstration: All patterns ecology restores the effect and the comparison order is: A>F>B>E>CK>D>C. Through"Returning Farmland"the pattern and the comparison to six kinds in the soil nutrient, the soil physical property and the climatic factors comparative analysis obtains: In soil nutrient recovery procedure, The organic matter and the entire phosphorus restore quickly, but the fast-acting phosphorus is slowest; In all takes back from agriculture pattern center form type A, Brestores the effect well, but pattern C restores the effect to be worst; In soil physical property, six kind of different vegetation restore in the pattern soil bulk density to be bigger than 1 besides the pattern E soil with the comparison ratio; They are better to the soil bulk density improvement effect. In climatic factors, six kind of pattern A, B, the F temperature are lower than the comparison in the temperature, In the pattern Returning Farmland into Forest or Grasses , pattern F temperature in each kind to be lowest,;In six kinds of the pattern of Returning Farmland into Forest or Grasses reduced to the wind speed are pattern B and the F average which the wind speed is best reduce wind speed 54.5%, Pattern E reduces the wind speed effect most to be bad is -9.1%. In strength of illumination, Pattern A, B, C, D, F all compared to compare to the strength of illumination influence lowly, pattern E is higher than the comparison.(4)Coupling analysis result: pattern A is the best coordinated development type, pattern E is the worst coordinated development type.