溪黄草浸提液对多年生狼尾草种子萌发的化感作用研究  

Study on allelopathic effects of Rabdosia serra extract on seed germination of Pennisetum alopecuroides

作　　者：陈幻真 黄燕丽 李超[1] 董朝霞[1] CHEN Huan-zhen;HUANG Yan-li;LI Chao;DONG Zhao-xia

机构地区：[1]华南农业大学南方草业中心,广东广州510642

出　　处：《饲料研究》2024年第22期84-88,共5页Feed Research

基　　金：国家自然科学基金项目(项目编号:31672039)。

摘　　要：试验旨在研究溪黄草浸提液对多年生狼尾草种子萌发与幼苗生长的影响。试验在每个培养皿中放置30粒狼尾草种子,分别加入0、5、10、20、40、80 g/L的溪黄草浸提液,每个处理3个重复,以蒸馏水为对照。结果显示,与对照相比,溪黄草干样与鲜样浸提液均会降低种子发芽率、发芽势和叶绿素含量,溪黄草干样浸提液浓度与鲜样浸提液浓度为80 g/L时,多年生狼尾草种子的发芽指数分别下降了81.2%、38.4%,种子活力指数分别下降88.9%、41.5%。干样浸提液对幼苗苗高抑制较明显,鲜样浸提液对幼苗根长抑制较明显。10、20、80 g/L干样浸提液对多年生狼尾草种子的化感抑制强度高于鲜样浸提液,且80 g/L干样浸提液的化感抑制强度最大。研究表明,溪黄草干样与鲜样浸提液对多年生狼尾草种子萌发和幼苗生长具有化感作用,溪黄草干样浸提液对多年生狼尾草种子萌发和幼苗生长的化感抑制作用强于鲜样浸提液,干样浸提液为80 g/L时抑制强度最大。The experiment aimed to study the effects of Rabdosiaserraextract on the Pennisetumalopecuroidesseeds and the growth of seedlings.In the experiment,30 Pennisetumalopecuroidesseeds were placed in a petri dish,and 0,5,10,20,40,80 g/L of Rabdosiaserraextract were added respectively,with three replicates for each treatment,using distilled water as a control.The results showed that compared with the control,both the dry and fresh extract solutions of Rabdosiaserra reduced the seed germination rate,germination potential,and chlorophyll content.When the concentration of the dry and fresh extract solutions was 80 g/L,the germination index of Pennisetum alopecuroides seeds decreased by 81.2%and 38.4%respectively,and the seed vigor index decreased by 88.9%and 41.5%respectively.The dry extract solution had a more pronounced inhibitory effect on seedling height,while the fresh extract solution had a more pronounced inhibitory effect on seedling root length.The allelopathic inhibitory intensity of the dry extract solution at concentrations of 10,20,80 g/L on perennial pennisetum seeds was higher than that of the fresh extract solution,with the 80 g/L dry extract solution showing the greatest allelopathic inhibitory intensity.The study indicates that both the dry and fresh extract solutions of Rabdosiaserrahave allelopathic effects on the germination and seedling growth of Pennisetumalopecuroides,with the dry extract solution having a stronger allelopathic inhibitory effect on the germination and seedling growth of Pennisetum alopecuroidesthan the fresh extract solution,and the inhibitory intensity is the greatest at a concentration of 80 g/L.

关 键 词：溪黄草 多年生狼尾草 浸提液 种子萌发 化感作用 

分 类 号：S816[农业科学—饲料科学]