粮肥间作是一种适应我国北方旱作区复种指数提高条件下培肥土壤的土地利用方式。它的中心内容是把作物的轮种在时间上予以尽量的缩短,实行带状种植,留下空档种植绿肥,再掩青绿肥实行作物套种,或者是在中耕作物行间间套插种绿肥,塞青用做追肥。在一个轮作周期中作物总产量提高的前提下,从生产的内部来解决肥源的问题,不出现地力亏损。 1976年我们在安徽省利辛县城郊公社试行推广这种耕作制度,在肥力水平稍高的砂姜黑土上,耩二耧小麦,间一耧苕子,在2/3的面积上每亩实收小麦304.6～459.1斤,麦收前在苕子掩青档中套种玉米,1/3的面积上实收玉米280斤,麦收后种黄豆,2/3面积实收226斤,三季合收810.6～865.1斤,同时每亩掩青苕子500～1212.5斤,用这个方法很快地把亩产提高到800斤,而当地习惯的小麦—黄豆、小麦—夏玉米、小麦—山芋土地利用法,亩产只有500～600斤 Intercropping of grain and fat is a kind of land use mode that adapts to fertilizing soil under the condition of increasing multiple cropping index in northern China. Its centerpiece is crop rotation in the shortest possible time, the implementation of strip planting, leaving gaps in the planting of green manure, and then covered with green manure intercropping crops intercropping Green manure, Cypriot green used to make fertilizer. Under the premise of the increase of total crop production in one rotation cycle, the problem of fertilizer source should be solved internally without any loss of productivity. In 1976, we piloted this farming system in the outskirts commune of Lixin County in Anhui Province. On the Shajiang black soil with a slightly higher fertility level, we boiled wheat in the middle of a two-thirds area over 2/3 of the area Receive wheat 304.6 ~ 459.1 pounds, before the wheat harvest in the raccoon dog-breeding stall interception corn, 1/3 of the area received 280 kilograms of corn, wheat harvest after planting beans, 2/3 area 226 kg received, 865.1 kg, at the same time cover 500 ~ 1212.5 kg per acre Qing emperor, using this method to quickly increase the yield to 800 pounds, and the local habits of wheat - soybeans, wheat - summer corn, wheat - potato land use law, mu Production only 500 ~ 600 pounds