三种化学物质对西葫芦性别表现的影响

Effects of Three Chemicals on Sex Expression in Pumpkin

用乙烯利诱导雌花、用赤霉素和AgNO3诱导雄花以控制西葫芦花的性别表现。用不同处理浓度的乙烯利(50、100mg/L)、GA3(50、100、1000mg/L)、AgNO3(200、300mg/L),在不同处理时期(子叶平展期和4叶期),对不同栽培品种进行处理,观察统计1～20节内雌花、雄花形成的数量并进行统计分析,找出最佳处理水平。结果表明,利用化学物质可以控制西葫芦性别表现。乙烯利50mg/L、GA31000mg/L、AgNO3300mg/L为最佳诱导剂浓度,处理时期以子叶平展期为佳,不同处理方法对性别表现的影响不显著,不同栽培品种对诱导的反应差异不显著。

The sex expression of pumpkin (Cucurbita pepo L.) was found to be controlled by foliar spray with ethephon and gibberellin and AgNO3.Ethephon (2chloroethyl phosphonic acid) at a concentration of 50 mg/L caused increase of femaleness and inhibition of male flower,and gibberellin at a concentration of 1 000 mg/L and AgNO3 at a 200,300 mg/L caused increase of maleness and inhibition of female flower.Spray tine of foliar was selected in cotyledonsatge.Different varieties are alike in sex expression with ethephon and gibberellin and AgNO3.Ethephon at a concentration of 100 mg/L caused plant injury,and gibberellin at concentration of 1 000 mg/L caused excessive growth.