【摘要】 利用线性规划方法 ,针对黄土丘陵区的农林牧用地结构进行优化模式设计 ,以最大收入为目标函数 ,在生态、社会效益需求的约束下 ,优化后的用地结构为非生产用地、农地、林地、牧草地各占 1 3%、1 8%、32 %、37%。运用优化模式模拟 ,人均纯收入达 3891元 ,人均占有粮 70 0 kg,水土流失模数为 480 0 t/km2 。更多还原

【Abstract】 By using linear programming methods the authors proposed that the optimal land use structure with unused land, agricultural land, forest land and pasture land account for 13%, 18%, 32%, 37% respectively. With the optimal land use structure the profit is greatly increased: income per capital reaches 3 891 yuan, silt lose module at 4 800 t/(km2·a), and food is safe with more than 700 kg/per-capital. Furthermore the income structure also improved greatly by increasing pasture part (in particular the constructing of artificial grassland) and decreasing cropping land. The optimal land use structure can be extended in loess hilly region to advance the eco-agriculture construction in Northwest China.更多还原