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环剥对苎麻开花的诱导效应 总被引:1,自引:1,他引:0
研究了5个品种(系)、3个环剥时期及两种密度下,环剥对苎麻(短日植物)开花的诱导效应。结果表明:环剥能诱导头麻成熟期已有花芽分化的品种(系)于5至6月的自然长日下只开雄花,比短日(10小时光照)处理株花蕾多、花期长,但环剥不能诱导同等条件下无花芽分化的品种开花。对成熟茎环剥比成熟前环剥、稀植比密植表现出更好的诱导效果。 相似文献
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This study evaluates the effect of gibberellic acid (GA3) in inducing parthenocarpy in ‘Algerie’ loquat, as well as the optimum treatment conditions and associated techniques, hand thinning and ringing, to produce seedless fruit with high enough quality for fresh consumption. GA3 applied in the course of the phenological growth stages 504–508 of the BBCH-scale produced seedless fruits, with the magnitude of the response depending on the concentration applied and number of treatments. Percentage of panicles bearing seedless fruitlets significantly increased with increasing GA3 concentrations up to 100 mg l−1 and significantly and positively correlated with the number of treatments applied. Trees treated three times with 100 mg l−1 developed more than 90% of panicles bearing almost 7 seedless fruits per panicle, which were smaller in size, drier and slightly acid but similar in TSS concentration and skin colour than seeded fruits from untreated trees. Fruit thinning to 3 fruits per panicle did not increase seedless fruit size, but ringing performed at the onset of cell enlargement stage, growth stage 702 of the BBCH-scale, significantly increased fruit size by 12–15%, depending on the year. Trees treated three times with 100 mg l−1 of GA3 and ringed produced 26 kg, on average, of seeded fruit of suitable commercial quality. 相似文献
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