摘要
Abstract
Aiming at the production problems of excessive post-harvest new shoot growth and low flower bud differentiation rate of early-maturing peach cultivar Siyuehong in Jinxiu County,Guangxi,this study explored the effects of paclobutrazol(100～300 mg/L)foliar spraying on shoot control and flower promotion,as well as its physiological mechanism.The results showed that the treatment with 250 mg/L paclobutrazol(with the addition of 0.05％organosilicon adjuvant and 0.3％potassium dihydrogen phosphate)significantly inhibited new shoot growth:compared with the control(foliar spraying with clear water),the new shoot length was shortened by 46.78％,the internode length by 34.38％,the basal thickness of new shoots was 6.5 mm,with an increase of 27.45％.The flower bud differentiation rate reached 92.8％(observed 60 days after treatment),which was 36.5 percentage points higher than that of the control.The soluble sugar content of flower buds increased by 42.03％and the C/N ratio was 9.1,with an increase of 44.44％.The ABA/GA3 ratio of leaves increased by 2.92 times(compared with the control).Combined with the local high-temperature and high-humidity climate,it is recommended to spray 250 mg/L paclobutrazol twice(10 days and 25 days after fruit harvest)together with supporting measures such as ditch drainage(depth ≥ 30 cm),branch pulling to an angle of 60°～70°,and foliar potassium supplement,so as to effectively improve the effects of shoot control and flower promotion.关键词
多效唑/四月红桃/营养生长/花芽分化/化学调控Key words
paclobutrazol/Siyuehong peach/vegetative growth/flower bud differentiation/chemical regulation分类
农业科技
