多效唑对早熟桃四月红的调控效应研究

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中图分类号：S662.1 文献标志码：A 文章编号：1002－2910（2025）06-0036-04

Regulatory effects of paclobutrazol on the early-maturing peach cultivar Siyuehong

LIAO Jianfeng

（Bureau ofAgriculture and Rural Affairs of Jinxiu Yao Autonomous County，Guangxi Zhuang Autonomous Region，Laibin，Guangxi 545700，China）

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 （ 100～300mg/LΩ foliarspraying on shoot controland flower promotion，as well as its physiological mechanism.The results showed that the treatment with 250mg/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 sprayingwith clear water），the new shoot length was shortened by 46.78% ，the internode length by 34.38% ，the basal thickness of new shootswas 6.5mm ，withanincrease 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 flowerbuds increased by 42.03% and the C/N ratio was9.1，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 250mg/L （202 paclobutrazol twice（1O daysand 25 daysafter fruit harvest） together with supporting measures such as ditch drainage （dep ）th⩾30cm ），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.

Key words：paclobutrazol; Siyuehong peach； vegetative growth； flower bud differentiation; chemical regulation

广西壮族自治区金秀瑶族自治县（以下称为广西金秀县）头排镇是华南地区的早熟桃产区，主栽品种四月红早熟桃，其丰产性好，4月底果实成熟，是“五一”期间市场的特色果品。（剩余4816字）