播期对不同向日葵品种的影响

选定4个播种时期,研究了12个向日葵(Helianthus annuus L.)品种在陕西神木县的最适播期。结果表明,播期对向日葵生长发育和产量造成重要影响。各品种出仁率、百粒重、产量等主要生产指标在播期为5月20日达到最大,之后随播期推迟呈降低趋势。同等生产条件下,油葵生育期短,株高、百粒重明显低于食用葵,但出仁率、产量与食用葵无明显差异。因此,该地区宜选取5月20日左右作为向日葵品种的最适播期。

Effect of Sowing Time on the Different Sunflower Varieties

Four sowing time were selected to study the suitable period of 12 sunflower (Helianthus annuus L.) varieties in Shenmu county,Shaanxi province. The results showed that the growth and yield of sunflower could be impacted by sowing date. The main production indexes of sunflower varieties,including kernel rate,hundred-grain weight and yield,were the largest in the sowing date of May 20th,and showed a decreasing trend with the delay of sowing date. Under the same production conditions,the growth period of the oil shrimp was short,and the plant height and hundred-grain weight were significantly low-er than that of the edible sunflower,but the kernel rate and yield had no difference between these two types of sunflower. So, about May 20th should be chosen for the best sowing period of sunflower varieties.