油用向日葵是改革耕作制度过程中,冬、春小麦的较好的接茬作物.为了充分发掘向日葵的增产潜力,几年来,我们在向日葵的播期、密度、施肥和灌溉等方面开展了群众性科学实验活动.1.播种期 本地栽培油用向日葵常因遭受叶斑病(褐斑)而减产,1977～1979年我们进行了不同播期受害情况的试验.试验结果:1977年以6月20～30日播种产量较高.1978～ Sunflower for oil is the better stubble crop for winter and spring wheat in the process of reforming the farming system. In order to fully tap the yield potential of sunflower, we conducted mass science in terms of sowing date, density, fertilization and irrigation of sunflower for several years Experimental activities.1.During the sowing period, the local cultivated oilseed sunflower was often cut off due to the leaf spot disease (brown spot), and from 1977 to 1979, we conducted the experiment of different sowing times.Results: In 1977, Seeds on the 30th higher yield .1978 ~