草业学报2025，Vol.34Issue(3)：224-232,9.DOI:10.11686/cyxb2024192
3种植物生长调节剂对结缕草耐荫性的影响
Effects of three plant growth regulators on shade tolerance of Zoysia japonica
摘要
Abstract
Light serves as the essential energy source,underpinning the processes of photosynthesis,growth,and nutrient assimilation within plant systems.However,urban green spaces frequently present challenges such as overshadowing of lawn areas by towering structures,which can seriously impede the lawn's capacity for normal growth and development.This research studied the maintenance and management of a Zoysia japonica cv.'Guanglv'lawn under shaded conditions.Foliar sprays of the mixed herbicide indaziflam(50 mL·ha-1)+trifloxysulfuron(22.5 mL·ha-1),paclobutrazol at 120 mL·ha-1 and trinexapac-ethyl at 50 mL·ha-1 were conducted under artificial shading(80% shade).This study comprehensively evaluated the effects of three plant growth regulators on the external morphology and physiological characteristics of'Guanglv'zoysiagrass.Traits measured included daily growth rate,leaf width,leaf green color intensity,percent green cover,superoxide dismutase activity,peroxidase activity,and malondialdehyde content.It was found that under continuous shading,'Guanglv'zoysiagrass displayed a range of stress symptoms,including etiolation,narrowing and lengthening of leaves,a reduction in relative chlorophyll content,a marked decrease in turf ground cover,elevated levels of malondialdehyde,and diminished activity of antioxidant enzymes.Among the growth regulators tested,the combination of 50 mL·ha-1 indaziflam+22.5 mL·ha-1 trifloxysulfuron and 50 mL·ha-1 trinexapac-ethyl proved the most effective.These treatments not only ameliorated the adverse stress symptoms in zoysiagrass under shaded conditions,but also increased antioxidant enzyme activity,effectively enhancing the environmental adaptability,stress resistance,and shade tolerance.关键词
结缕草/植物生长调节剂/耐荫性Key words
zoysiagrass/plant growth regulator/shade tolerance引用本文复制引用
林心怡,王旎,陈拓,宋一岚,陆耀东,董朝霞..3种植物生长调节剂对结缕草耐荫性的影响[J].草业学报,2025,34(3):224-232,9.基金项目
国家自然科学基金项目(31672039)和广东省企业科技特派员专项(GDKTP2021049200)资助. （31672039）
