一、研究的依据和目的油菜、棉花套种用为耕作改制的一种手段,在许多省、市、地区早有研究,其中某些套种方式在生产上显示了良好效果。如湖北省松滋、云梦(1959)普遍推广在油菜田予留1.5～2尺的宽行间套棉花,油菜能保护棉苗免受冻害,套种棉花一般出苗齐,长势好。河北省何横城大队在套种棉花上实行高低垅种植,取得了一次播种保全苗的经验(1975)。 1970年,我省由青海引种“门源”小油菜10万斤。在套种试验中,采取平作套种方式,带型4.2尺,小油菜行距6寸,棉花行距1.2尺。1971年设计过6种套种方式, I. The Basis and Purpose of the Study Rape and cotton intercropping are used as a means of farming system reform and have been studied in many provinces, cities and regions. Some of the intercropping methods have shown good results in production. For example, Songzi and Yunmeng (1959) in Hubei Province generally promote the use of 1.5 to 2-foot broad-width intercrop cottons in rapeseed fields. Rape can protect the cotton seedlings from frost damage. Interplanting cotton generally grows well and grows well. He Hengcheng Brigade in Hebei Province, the implementation of intercropped cotton planting height, made a seedling experience of planting seedlings (1975). In 1970, the province introduced by the Qinghai “door source” rape 100000 kg. In the intercropping test, the flat intercropping method was adopted. The belt type was 4.2 feet and the canola spacing was 6 inches. The cotton spacing was 1.2 feet. 1971 designed six kinds of intercropping methods,