以六年生亚历山大(Vitis vinifera cv.Mascat of Alexandria)葡萄为试材,在盛花期前15d左右、花穗长度为3.0~8.0cm时使用5个不同质量浓度(1、2、3、4和5mg/L)的赤霉酸(GA_3)溶液对葡萄花穗进行喷洒处理,研究GA_3处理对疏果简约化和果实品质的影响。结果表明,3mg/L的GA_3在新稍长度为15~20cm、展叶数为6~7片(花穗长度为4.0cm左右)时处理效果最佳。与自然生长果穗相比,可使花穗拉长50%,果穗疏松但不过于松散,坐果较好,平均穗质量最大,并能有效减少疏果工作量,省工38%。与对照相比,不同质量浓度的GA_3处理均显著提高了亚历山大葡萄果实中可溶性固形物、葡萄糖、果糖、酒石酸、苹果酸和芳樟醇含量,并且3mg/L处理显著提高了葡萄果实中总酚和橙花醇含量。因此,3mg/L GA_3处理的果实品质较优,并且能够有效减少人工疏果的工作量。生产中建议在盛花期前15d左右用3mg/L GA_3对亚历山大葡萄花穗进行喷施处理,以减少劳动成本、提高劳动效率。
【英文摘要】
Alexandergrape(Vitis vinifera cv.Muscat of Alexandria)belongs to Euro-Asian species and performs excellent in the southern China such as Zhejiang Province.However,as its high fruit setting and compact fruit spikes,fruit thinning in time was very necessary.Currently,elongating clusters of grape using gibberellin(GA_3)is widely applied in Euro-American species;however,the effects of clusters elongation on fruit quality and simplified degree of fruit thinning have not been reported.In addition,the concentratio...