叶面喷施生长延缓剂对多年生黑麦草生长及生理的影响  

Effects of foliar application with plant growth retardant on the growth and physiology of perennial ryegrass

作　　者：张馨馨 刘璐[1] 陆妮[1] 王婧[1] 刘骐华 王慧慧[1] 柴琦[1] ZHANG Xin-xin;LIU Lu;LU Ni;WANGJing;LIU Qi-hua;WANG Hui-hui;CHAI Qi(Key Laboratory of Grassland Livestock Industry Innovation,Ministry of Agriculture and Rural Af fairs,Engineering Research Center of Grassland Industry,Ministry of Education,College of Pastoral Agriculture Science and Technolog y,Lanzhou Universit y,Lanzhou 730020,China)

机构地区：[1]兰州大学农业农村部草牧业创新重点实验室,兰州大学草地农业教育部工程研究中心/草地农业科技学院,甘肃兰州730020

出　　处：《草原与草坪》2020年第4期47-53,共7页Grassland and Turf

基　　金：2017 N-应用基础研究-农业与社发-民生与社会事业及公众健康-“南通耐盐碱草种评定与筛选”项目(MS12017019-2)。

摘　　要：为明确植物生长延缓剂对草坪草生长及生理特性的影响,以多年生黑麦草(Lolium perenne)绅士品种为材料,设置不同浓度梯度的乙烯利(200、500、1000、1200、1500 mg/L)、多效唑(50、100、250、500、800 mg/L)和矮壮素(将50%矮壮素水剂分别稀释1000、750、500、200、100倍)进行叶面喷施,测定不同处理下多年生黑麦草的株高、叶面积、叶长、叶宽、叶绿素含量、脯氨酸含量、根系活力等指标。结果表明:3种植物生长延缓剂均能不同程度地抑制多年生黑麦草株高、叶面积和叶长的增长,同时大幅增加脯氨酸含量和根系活力。多效唑对多年生黑麦草生长和生理特性的影响较乙烯利和矮壮素明显,且500 mg/L的多效唑在所有处理中效果最佳,是矮化草坪,提高草坪抗性的最佳延缓剂浓度。In order to reveal the effects of plant growth retardant foliar sprays on the seedling growth and physiochemical characteristics of turfgrasses,different concentrations of ethephon(200,500,1000,1200,1500 mg/L),paclobutrazol(50,100,250,500,800 mg/L),and chlormequat(chlormequat queous solution was diluted by 1000,750,500,200 and 100 times respectively)were applied by foliar spraying on the perennial ryegrass seedlings,Lolium perenne,with cultivar of Shenshi,as tested material,and the effects of different treatments on plant height,leaf area,leaf length,leaf width,chlorophyll content,proline content,and root activity were analyzed.The results showed that three kinds of plant growth retardants inhibited the growth of plant height,leaf area and leaf length of perennial ryegrass,while the proline content and roots activity increased.However,the effect of paclobutrazol on the growth and physiological characteristics of perennial ryegrass was more significant than that of ethephon and chlormequat,and foliar spraying of paclobutrazol under concentration of 500 mg/L obtained the most optimal retardant effect for seedling dwarfing and lawn resistance to adverse environment.

关 键 词：多年生黑麦草 乙烯利 多效唑 矮壮素 生理生长特性 

分 类 号：S482.8[农业科学—农药学]