三叶草根浸提液对3种牧草种子萌发及幼苗生长的影响
Effects of Clover Root Extract on Seed Germination and Seedling Growth of Three Forage Species
俞靓 1谢治国 1董强 2杨波 1李群 2李军保1
作者信息
- 1. 陕西省林业科学院
- 2. 陕西省林业科学院;黄土高原水土保持与生态修复国家林业和草原局重点实验室,西安 710082
- 折叠
摘要
为探索三叶草的防控及利用提供理论依据,采用培养皿生物测定法分析,研究不同浓度(0、2.5、5.0、10.0 g·L-1)三叶草根浸提液对黑麦草(Lolium perenne)、高羊茅(Festuca arundinac)和赖草(Leymus secalinus)种子萌发及幼苗生长的化感作用,以及三叶草(Trifolium repens)的生长竞争力和成功入侵原因.结果表明,三叶草根浸提液对3种牧草种子萌发(发芽率、发芽指数)和幼苗生长(根长、苗长、根干重、苗干重)均有化感作用,且其化感作用效应存在一定的差异.三叶草根浸提液对黑麦草种子萌发具有抑制作用,对高羊茅和赖草的种子萌发有"低促高抑"作用,对黑麦草根长和干重、苗高和干重均具有抑制作用,对高羊茅和赖草则表现为低浓度的促进、高浓度的抑制效应.从综合化感效应指数来看,随着三叶草根浸提液浓度的增加,对黑麦草具有抑制作用,而对高羊茅和赖草有"低促高抑"的双重作用.3种供试牧草对三叶草根浸提液的敏感程度也有差异,表现为:黑麦草＞高羊茅＞赖草.入侵植物三叶草根浸提液对3种牧草的化感效应较为明显,在入侵严重的地方,可选择补播耐受力强的牧草.
Abstract
To explore the growth competitiveness of clover(Trifolium repens)from the perspective of allelopathy,and better explain the reason of successful invasion of Trifolium repens,petri dish bioas-say was used to study the effects of different concentrations(0,2.5,5.0,10.0 g·L-1)of clover root extract on the seed germination and seedling growth of Lolium perenne,Festuca arundinac and Leymus secalinus.The result showed that clover root extract liquid has allelopathic effects on seed germination(germination rate,germination index)and seedling growth(root length,seedling length,root dry weight,seedling dry weight)of three types of forage seeds,and there are certain differences in their allelopathic effects.Clover root extract liquid has an inhibitory effect on the germination of ryegrass seeds,and has a"low promotion and high inhibition"effect on the seed germination of Festu-ca arundinac and Leymus secalinus.It has an inhibitory effect on the root length and dry weight,seedling height and dry weight of ryegrass shows a low concentration promoting effect and a high con-centration inhibiting effect on Festuca arundinac and Leymus secalinus.From the perspective of com-prehensive allelopathic effect index,as the concentration of clover root extract liquid increases,it has an inhibitory effect on ryegrass,while it has a dual effect of"low promotion and high inhibition"on tall Festuca arundinac and Leymus secalinus.There are differences in the sensitivity of the three test-ed forages to the clover root extract liquid,as follows:Lolium perenne＞Festuca arundinac＞Ley-mus secalinus.The allelopathic effect of clover root extract liquid on three types of forage is obvious.In areas with severe invasion,it is advisable to choose forage with strong tolerance for replanting.
关键词
三叶草/浸提液/黑麦草/高羊茅/赖草/化感效应Key words
Trifolium re pens/extract liquid/Lolium perenne/Festuca arundinac/Leymus secalinus/allelopathy引用本文复制引用
基金项目
陕西省林业科技创新计划优秀青年人才培育专项(SXLK2021-0604)
陕西林业科技创新重点专项(SXLK2022-02-12)
出版年
2024
国家科技期刊平台
NSTL
万方数据