【摘要】 在种植业"农户分散承包土地、乡(村)统一代耕服务"的双层经营体制下,依据乡(村)的实际经济发展水平,农机代耕作业项目的选择主要取决于农户劳均耕地面积的大小,而乡(村)各项作业的机械化程度主要取决于该乡(村)范围内各农户劳均耕地面积的群体分布。据此,建立了能反映我国选择性机械化特点的乡(村)服务型机群配备的数学模型,并以北京大兴县青云店乡为实例进行验算。计算结果反映了随着农村劳动日工值和劳均耕地面积变化而变化的农机作业项目和机群的动态过程。更多还原

【Abstract】 It is considered that,under the system that family dispersily manages land and commune(village)unifily makes machinery operation,and under some rural economic le- vel of the commune(village),the selection of serving machinery operation items is mainly directed by the land size per famer of family.The mechanization level of each machinery operation items is mainly directed by the distribution of land size per farmer of families. Based on this point of view,a mathematical model of serving machinery selection in the commune(village)is developed.This mathematical model is verified by taking Qingyun- dian Commune for an example to make actual calculation.更多还原