保水剂和纤维对干旱胁迫下类壤土基质中黑麦草生长的影响  

Effect of super absorbent polymer and fiber on the growth of ryegrass in simulate loam under drought stress

作　　者：金香一 孙威 刘波 张峰 李明堂[1] JIN Xiang-yi;SUN Wei;LIU Bo;ZHANG Feng;LI Ming-tang(College of Resources and Environment,Jilin Agricultural University,Changchun 130118,China;Jilin Xinwang Geological Engineering Co.,Ltd.,Tonghua 135099,Jilin,China)

机构地区：[1]吉林农业大学资源与环境学院,长春130118 [2]吉林省信旺地质工程有限公司,吉林通化135099

出　　处：《湖北农业科学》2024年第12期129-134,共6页Hubei Agricultural Sciences

基　　金：吉林省科技发展计划项目(20210203025SF)。

摘　　要：采用盆栽控水法研究保水剂和纤维对干旱胁迫下类壤土基质中黑麦草(Lolium perenne L.)生长的影响,试验分为对照组(无添加)、1%纤维组、0.3%保水剂组、1%纤维+0.3%保水剂组,以第1天取样测定作为对照,此后进行断水处理,开始干旱胁迫试验,在5、10、15、20、25、30 d观察黑麦草的生长特征,测定相对含水量、相对水分亏缺、相对电导率、丙二醛、可溶性糖、脯氨酸和叶绿素相对含量。结果表明,各处理黑麦草的抗旱能力由大到小依次为0.3%保水剂+1%纤维组、0.3%保水剂组、1%纤维组、对照组。与对照组相比,随着干旱时间的增加,单施保水剂可减缓类壤土基质中黑麦草的萎蔫和黄化程度;减缓黑麦草相对含水量的下降程度,使相对含水量增加25.38%,相对水分亏缺下降28.57%;降低相对电导率和丙二醛的上升速度,使相对电导率下降23.57%,丙二醛含量下降14.25%;减缓可溶性糖含量的变化程度并降低脯氨酸的累积速度,使可溶性糖累积量下降13.06%,脯氨酸累积量下降45.79%;减缓叶绿素SPAD值的下降程度,使叶绿素SPAD值增加53.68%。保水剂和纤维的共同作用效果好于单施保水剂效果,与对照组相比,使黑麦草相对含水量增加36.09%,相对水分亏缺下降40.62%;使相对电导率下降26.69%,丙二醛含量下降31.69%;使可溶性糖累积量下降16.91%,脯氨酸累积量下降65.42%;叶绿素SPAD值增加70.59%,进一步延长黑麦草在干旱时的存活时间,提升黑麦草的抗旱能力。The effect of super absorbent polymer and fibers on the growth of ryegrass in simulate loam under drought stress was investi⁃gated using a potted water control method.The experiment was divided into four groups,namely the control group(without addition),1%fiber group,0.3%super absorbent polymer group,and 1%fiber+0.3%super absorbent polymer group.During the experiment,samples were taken and measured on the first day as a control,and then water was cut off to start the drought stress experiment.On the 5,10,15,20,25,and 30 d of the experiment,the growth characteristics of ryegrass were observed,and the relative water content,relative water deficit,relative conductivity,malondialdehyde,soluble sugar,proline and chlorophyll were recorded.The results showed that the drought resistance of ryegrass in each treatment was in the order of 0.3%super absorbent polymer+1%fiber group,0.3%super absorbent polymer group,1%fiber group,control group,from highest to lowest.Compared with the control,as the number of dry days increased,super absorbent polymer alone reduced the degree of wilting and yellowing of ryegrass in simulate loam;the degree of de⁃cline in the relative water content of ryegrass was slowed,resulting in a 25.38%increase in relative water content and a 28.57%reduc⁃tion in relative water deficit;reduced the rate of increase in relative conductivity and malondialdehyde,resulted in a 23.57%reduc⁃tion in relative conductivity and a 14.25%reduction in malondialdehyde content;slowed the degree of change in soluble sugar content was slowed and the rate of proline accumulation was reduced,resulting in a 13.06%reduction in soluble sugar accumulation and a 45.79%reduction in proline accumulation;the degree of decrease in chlorophyll SPAD value was slowed down,resulted in a 53.68%increase in chlorophyll SPAD value.The combined effect of super absorbent polymer and fiber was better than the effect of super absor⁃bent polymer alone,compared to the control,the relative water content of ryegrass was increased by 36.09%an

关 键 词：黑麦草(Lolium perenne L.) 类壤土基质 保水剂 纤维 干旱胁迫 

分 类 号：X45[环境科学与工程—灾害防治]