關(guān)系行為機(jī)制模型研究(發(fā)展經(jīng)濟(jì)學(xué)-中國(guó)科學(xué)院研究生-wenkub
2023-02-26 04:37:10 本頁面
【正文】 use choice, especially land use choice of slope fields, and then have significant impacts on soil erosion. ? The effects of price change on soil erosion depend on ratio of erosion modulus between concerning crops. Offfarm job opportunity and soil erosion? Increase in offfarm job opportunities for seasonal parttime labors have few effects on land use activities. ? Increase in offfarm job opportunities for constant offfarm labors will influence land use choice and then land degradation. ? While the number of constant offfarm labors continues to increase and exceeds over 25 persons, cultivation of millet in slope fields will tend to decrease. ? As the result, soil erosion will tend to decrease due to withdrawal of cultivation in slope fields along with an increase in offfarm job opportunities. Land conversion policy and soil erosion? Introducing land conversion policy will affect land use choice of slope fields as well as terrace fields, and conitant livestock choice, then have significant effects on reducing soil erosion.? Subsidy towards converted slope fields will encourage conversion of slope fields and have significant effects on land use choice, livestock choice as well as soil erosion.Subsidy and soil erosion? When introducing land conversion policy without subsidy, farm ine tends to decrease as a cost for bating soil erosion. While allowance of more than 160 Yuan per was paid for farmers, soil erosion will be relieved significantly with an increase in farm ine. ? The subsidy for converted slope fields in loess plateau includes 100kg grain with a price of per kg and 20Yuan of foodfor work aid per , which is equal to 160Yuan per . Conclusion and implication? An integrated bioeconomic household model may simulate the effects of change in socioeconomic factors on land degradation by involving farm economic behavior within an integrated framework.? Mathematical programming approach is useful to develop a bioeconomic household model because it can bine farm economic behavior and biophysical process.Conclusion and implicationcontinue? The soil conservation program to convert slope fields into forest or pasture is an effective way for bating soil erosion. ? A reasonable subsidy as pensation that is higher than profit of land use activity of converted slope fields may encourage farmers join the conservation program and adopt of conversion activity.Conclusion and implicationcontinue? Farmers might go back to cultivate slope fields that have been converted into pasture w
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