不同播种期对黄瓜性型分化的影响

以强雌系黄瓜品种D0422和弱雌系黄瓜品种东农803为试验材料,设5个播种期,每次间隔15～16d。调查黄瓜主茎前20节内雌雄花数量及雌雄花比例。结果表明,播种期对强雌系黄瓜品种D0422的影响较大,雌花数量与雌雄花比例有相同的变化趋势,先上升再下降,雄花数量很少,在5个播种期中以4月5日雌花数量最多,雌雄花比例也最大。播种期对弱雌系黄瓜品种东农803的影响不大,并且此品种以雄花为主,雌花只占很少的比例。

Effect of sowing date on sex differentiation of cucumbers

Numbers of the male and female flowers,ratios of male and female flowers of the first 20 nodes of the main stem in subgynoecious D0422 and monoecious Dongnong803 of cucumbers have been studied.Five sowing dates have been investigated,whose interval is 15-16 d.The results showed that the effect of the sowing date on D0422 was greater.The numbers of female flowers and ratios of male and female flowers had the same change trend,which increased at first and then decreased,and the number of male flower was very few.The number of female flower was the maximum on April 5th during the five sowing dates,the ratios of male and female was the maximum at the same time.The effect of sowing date on Dongnong803 was few,the variety was mainly about male flowers,but the number of female flower was few.