农业土地用途的模式modeloffarmìng.ppt

B.2. A Model of Agricultural land use 農業土地用途的模式 (2) Sinclair’s Model 辛克萊模式 Sinclair’s Model 辛克萊模式 Development發展 (Reasons for the development of new model發展新模式的原因) Von Thunen’s model failed to apply in the advanced industrialized countries with continuous urban expansion 范杜能模式不能應用於城市不斷擴張的工業國家 Under continuous urban expansion 城市不斷擴張下 competition between urban and rural land use on the urban edge has became keen 在城市邊緣，城市與農業土地用途的競爭激烈 with increasing distance from the market centre, the intensity of production will increase, and crop types will be varied 隨與城市距離增加，生產密度增加，農作物的類別亦改變 Urban 城市 vs Agricultural 農業 urban land use has higher rent / return 城市用地有較高的租值／回報 it may displace rural land use 它能取代農業用地 Degree of urban encroachment　城市蠶食的程度 the greater the chance of urban land use taking over, the less the farmers invest in land 被城市用地取替的機會越高，農夫在土地上的投資越少 the degree of this anticipation declines with distance from city 預測的程度會隨城市距離而遞減 Agricultural land use pattern 農業用地模式 O: urban centre O-Y: value of agriculture is 0 農業價值是零 Under the anticipation of urban encroachment在城市蠶食的預測下，farmers do not invest in land between O-Y　農夫不會在O-Y間的土地投資 Y-B: when degree of urban anticipation decreases, investment increases. Value of agricultural increases.當預測的程度下降，投資會增加，農業價值上升 From B: there is no more anticipation of urban expansion. Agricultural value is high 沒有城市擴張的預測，農業價值高 next to market 鄰近市場 there is land with no agricultural value 土地無農業價值(abandoned land棄耕地) Land use (1) with gentler slope of agricultural value 土地利用(1)的農業價值坡度較平緩 less intensity of agricultural investment is located near market 投資密度較少的農業活動較近市場 steeper slope (2), is the more intensive type of agricultural (2)的農業價值坡度較陡斜,屬於較集約式的農業類別 Sinclair’s Model 辛克萊模式 Sinclair’s Model 辛克萊模式 Zone 1: at the edge of the built-up area 在已發展地區的邊緣 land is changing to urban areas不斷改變為城市用地 held by speculators被投機者持有 exception例外: farm factories農業工廠, green house溫室 Zone 2: zone of vacant land空置用地 held by speculator or farmers intending to sell the la