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1977—1979年间在江苏扬州、南通和西藏乃东等地进行了向日葵冬播和播种期对植株性状影响的研究。结果说明,春葵花品种属感温性较强而感光性较弱的类型;秋葵花品种属感光性较强而感温性较弱的类型。春葵花冬末或早春播种,与晚春播种时相比,总叶片数、绿叶数较多,茎较粗,百粒重和单株生产力较高。播种期对产量的影响显著大于对其他性状的影响。春分前播种,产量显著高于清明后播种的。盐碱土地区和春旱缺水地区,向日葵冬播有利成苗,可作为一项增产措施。
1977-1979 in Yangzhou, Jiangsu, Nantong and Tibet Nidong conducted sunflower sowing and sowing date on plant traits. The results show that the varieties of spring sunflower is a strong sense of temperature and the weaker type of photosensitive; okra varieties are sensitive and sensitive to the type of weaker. Cotyledons were planted at the end of winter or early spring. Compared with the late spring, the numbers of total leaves, green leaves, stems were thick, and the yield per plant was higher. The effects of sowing date on yield were significantly greater than those on other traits. Sowing before spring equinox, the yield was significantly higher than that after sowing. Salt and alkali soil areas and spring drought drought areas, sunflower winter planting favorable seedlings, can be used as a stimulation.