【摘要】 [目的]研究PCPA对小南瓜结实性状和果实品质的影响,为冀西北坝上地区农业高效生产和农民增收提供参考。[方法]以自然生长的小南瓜(经人工授粉)为对照,用不同浓度的PCPA处理经人工授粉或未授粉的小南瓜雌花花柱,研究其结实性状和果实品质的变化。[结果]用浓度为138 mg/kg的PCPA处理小南瓜未授粉的雌花花柱对增加单果重效果较好;用浓度79 mg/kg的PCPA处理小南瓜能显著改善籽粒分配比率,提高净瓜率和果肉厚,利于增加果肉比重;用浓度为50 mg/kg的PCPA处理小南瓜经人工授粉的雌花花柱,能显著提高VC和β-胡萝卜素含量,对果实品质的改善有良好的促进作用。[结论]低浓度的PCPA对改善小南瓜的结实性状和提高其果实品质起决定性作用。更多还原

【Abstract】 [Objective] The paper studied the effect of PCPA treatment on bearing character and fruit quality of pumpkins which provided references for income increasing and producing high efficiently in northwest dams of Hebei.[Method] With normal pumpkin(artificial pollination) as CK,the study aimed to research the changes of bearing character and fruit quality with artificial pollination and unpollinated female flower style treated by different concentrations PCPA.[Result] Unpollinated female flower style of pumpkin treated by PCPA of 138 mg/kg concentrations which can increase the per fruit weight effectively;pumpkin treated by PCPA of 79 mg/kg concentrations can significant improve grain distribution ratio and enhance the net flesh rate and flesh thickness;Unpollinated female flower style of pumpkin treated by PCPA of 50 mg/kg concentrations can improve the vitamin C and β-carotene content and promote the fruit quality well.[Conclusion] Lower concentrations of PCPA played a decisive role for improving bearing character and fruit quality of pumpkin.更多还原