The cropping system for facility agriculture on Loess Plateau
黄土高原设施农业种植制度探析

The cropping systems of(cucumber) and other different crops which were conducted in plastic greenhouse on(Loess) Plateau were studied.The results show that after cucumber harvest,there is(significant) effects of different cropping systems on soil(microbe,) the soil microbe is the(lowest) in follow,the second lower is(planting) cowpea or other legumina(crops.) The highest cucumber yield can be got after(planting) corn for green manure,black-bean for green (manure) or(planting) cowpea,then higher(cucumber) yield can be got after follow,the cucumber(yield) is the lowest after planting(tomato,) cabbage.It is efficient rotation system for overcoming continuous cropping obstacle to use rotation system of (cucumber) with corn for green manure,black-bean for green manure or planting cowpea.