關系行為機制模型研究課件-免費閱讀
【正文】 Livestock input (4)– Rotation (2)– Soil erosion (1)Land use in Gezhenyan Village, Zhunger, Inner MongoliaThe policy measure of converting slope field into forest and pasture started Since 2023, with subsidy of 100kg grain and 20Yuan foodfor work per Cropping system and land use Total Flat field Terrace field Slope fieldSown area YieldSown area YieldSown area YieldSown area Yield ha kg/ha ha kg/ha ha kg/ha ha kg/haCorn 6,660 9,250 5,100 3,750Millet 1,819 1,850 1,808Rapeseed 580 660 500Sunflower 885 1,000 836Potato 7,500 7,125 7,725Beans 1,400 1,500 1,300Total Agriculture and farm economy farm type unit Total Farm householdParttime householdhousehold person 21 12 9population person 81 49 32labor person 56 34 22offfarm labor person 14 4 10seasonal offfarm labor person 9 3 6constant offfarm labor person 5 1 4population per household person per household cultivated land ha per household family ine Yuan per household 8,904 9,645 7,998farm ine Yuan per household 5,945 9,018 2,188offfarm ine Yuan per household 2,960 627 5,810ratio of offfarm ine % 33% 7% 73%ratio of livestock ine within farm ine% 66% 69% 51%Prices of agricultural productsmodity farm gate pricesfarm purchase prices modityfarm purchase pricesCorn Wheat Millet Rice Potato Beef Sunflower Fish Rapeseed Vegetable Mutton Compound fertilizer Pork Carbamide Wool 200 Carbon ammonia Goat 240 Corn seed Sheep 140 Hog 800 Soil erosion: EPIC result Soil erosion values derived from EPIC ModelField typeFlat fieldTerraceSlope fieldSlope 0% 5% 10%Maize Millet Sunflower Rapeseed Potato Beans Note: 1)unit is ton results are means of ten years. 2)simulation results are means of ten years.Agriculture and land use system? Croplivestock system: corngoatsheephog.? Corn mainly in flat field for feed and mercial use。區(qū)域可持續(xù)發(fā)展與人地關系行為機制模型研究石 敏俊筑波大學區(qū)域可持續(xù)發(fā)展與人地關系行為機制模型研究 ? 區(qū)域可持續(xù)發(fā)展與農業(yè)環(huán)境政策? 人地關系行為機制模型框架的建立：外部社會經濟因素影響人地關系變化的機制? 鄂爾多斯高原： 人地關系 行為機制模型 與退耕還林對水土保持影響的比較靜態(tài)模擬? 自然科學與社會科學相融合的必要性區(qū)域可持續(xù)發(fā)展與農業(yè)環(huán)境政策 ? 歐美國家的農業(yè)環(huán)境政策–石油農業(yè)的化肥農藥高投入導致水質污染等環(huán)境問題–價格支持政策導致農產品過剩–農業(yè)環(huán)境政策的核心是推行農業(yè)粗放化經營，減少化肥農藥投入，減少農產品產量–對于實行粗放經營的農戶給予政策補貼發(fā)展中國家的農業(yè)環(huán)境問題? 土地退化引起的農業(yè)環(huán)境問題– 沙漠化，水土流失，鹽堿化? 環(huán)境負荷引起的農業(yè)環(huán)境問題– 水質污染，土壤污染? 土地退化的人為因素– 人口壓力，農業(yè)技術水平? 依賴資源投入的靜態(tài)增長導致農業(yè)粗放再生產和土地利用的平面擴張，土地利用超過環(huán)境容量時帶來土地退化發(fā)展中國家的農業(yè)可持續(xù)發(fā)展? 解決土地退化問題的出路在于發(fā)展可持續(xù)集約農業(yè)–可持續(xù)集約農業(yè)：通過集約化達到可持續(xù)? 集約化：對少量土地實行集約
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