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

作　　者：林心怡 王旎 陈拓 宋一岚 陆耀东 董朝霞 LIN Xin-yi;WANG Ni;CHEN Tuo;SONG Yi-lan;LU Yao-dong;DONG Zhao-xia(College of Forestry and Landscape Architecture,South China Agricultural University,Guangzhou 510642,China;College of Agriculture,South China Agricultural University,Guangzhou 510642,China;Guangdong Biranmei Landscape Art Co.,Ltd.,Foshan 528200,China)

机构地区：[1]华南农业大学林学与风景园林学院,广东广州510642 [2]华南农业大学农学院,广东广州510642 [3]广东碧然美景观艺术有限公司,广东佛山528200

出　　处：《草业学报》2025年第3期224-232,共9页Acta Prataculturae Sinica

基　　金：国家自然科学基金项目(31672039);广东省企业科技特派员专项(GDKTP2021049200)资助。

摘　　要：光照是草坪草进行光合作用的重要能源,是植物进行生长和养分合成的基础。然而,在城市中高楼大厦等建筑物的遮挡往往会对草坪造成影响,限制正常的生长发育。为优化遮荫环境下的草坪养护与管理,以“广绿”结缕草(‘Guanglv’)为试验材料,在人工遮荫条件(遮荫率80%)下,叶面喷施混合除草剂茚嗪氟草胺(50 mL·hm^(-2))+三氟啶磺隆(22.5 mL·hm^(-2))、多效唑(PBZ,120 mL·hm^(-2))和抗倒酯(TE,50 mL·hm^(-2)),探讨其对“广绿”结缕草的外部形态和生理特性的影响,包括平均日生长速度、叶片宽度、叶片绿色程度、盖度、抗氧化酶活性和丙二醛含量。结果表明:“广绿”结缕草在长期遮荫条件下会出现徒长、叶片形态趋向于狭长、叶绿素相对含量下降、盖度大幅下降、丙二醛含量增加、抗氧化酶活性下降的态势。3种生长调节剂中,以喷施50 mL·hm^(-2)茚嗪氟草胺+22.5 mL·hm^(-2)三氟啶磺隆和50 mL·hm^(-2)抗倒酯的效果较好,不仅可以改善弱光条件下结缕草的不良形态,还有效增强了草皮的环境适应性与抗逆性。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 

分 类 号：S688.4[农业科学—观赏园艺]