纳米生长调节剂对按树矮化及生理特性的影响

打开文本图片集

中图分类号：S792.390.1 文献标志码：A 文章编号：1004-390X（2025）04-0139-09

Abstract： [Purpose] To investigate the dwarfing efficacy of nano-growth regulators on eucalyptus and their physiological impacts， providing a novel approach for developing enhanced growth regulators and optimizing Vegetation management strategies near high-voltage power lines. [Methods] Pot experiments were conducted on l-year-old eucalyptus saplings. Ten treatments were applied via foliar spraying， including four conventional growth regulators （paclobutrazol，uniconazole， chlormequat chloride， mepiquat chloride）， two nano-capsule suspensions （paclobutrazol and uniconazole），and four film-forming nano-capsule suspensions （paclobutrazol/uniconazole film-forming， chlormequat/mepiquat chloride sustained release nano emulsions）， with a water-sprayed control （CK）. This design evaluated the nano-formulations’ dwarfing eficacy and physiological impacts. [Results] Al ten growth regulator treatments inhibited height growth compared to CK. Although they temporarily impacted leaf physiology， including SPAD values， photosynthetic rates，antioxidant enzyme activities， malondialdehyde levels， and endogenous hormones， these parameters gradually recovered to CK levels over time without causing irreversible damage to the survival rate and physiology of the eucalyptus. After nano-modification， the dwarfing efficacy of conventional growth regulators was significantly enhanced. Among the treatments， paclobutrazol and uniconazole film-forming nano-capsule suspensions demonstrated optimal performance， reducing height growth by 90.02% and 93.54% ，respectively， compared to CK. [Conclusion] The dwarfing efficacy of conventional growth regulators is significantly improved after nano-modification， and the paclobutrazol and uniconazole film-forming nanocapsule suspensions represent optimal formulations.This technology can efectively inhibit eucalyptus apical growth. Combined with drone spraying technology， it is expected to provide an eficient solution for tree-power line conflicts near high-voltage power lines.

Keywords： eucalyptus; plant growth regulator; plant height; dwarfing

随着中国电力的发展以及电网规模的不断扩大，高压和特高压输电线路经常需要跨越森林区域。（剩余12774字）