柳枝稷对3种杂草种子的化感作用  

Allelopathy of Panicum virgatum on Seeds of Three Weed Varieties

作　　者：吕勇 李永梅[1] 侯新村[2] 郑瑞伦[2] 范希峰[2] LU Yong;LI Yongmei;HOU Xincun;ZHENG Ruilun;FAN Xifeng(School of Resources and Environment, Yunnan Agricultural University, Kunming, Yunnan 650201;Research and Development Center for Prataculture and Environment, Beijing Academy of Agriculture and Forestry ,Beijing 100097, China)

机构地区：[1]云南农业大学资源与环境学院,云南昆明650201 [2]北京市农林科学院草业与环境研究发展中心,北京100097

出　　处：《贵州农业科学》2018年第4期56-60,共5页Guizhou Agricultural Sciences

基　　金：国家自然科学基金项目"坡耕地红壤主要农作物根系固土抗蚀生物力学特征研究"(41461059);"间作影响坡耕地红壤团聚体分型特征和抗蚀性的机制"(41661063);北京市农林科学院科技创新能力建设专项(KJCX20170207;KJCX20150101)

摘　　要：探明柳枝稷对常见杂草的化感效应,为杂草的生物防治提供参考。利用柳枝稷成熟期根、茎提取液处理牛筋草、反枝苋及狗尾草的种子,以种子发芽率为种子萌发的参数,以胚根、胚芽长度变化为幼苗的生长参数,研究柳枝稷对3种杂草种子发芽及幼苗生长的化感作用。结果表明:柳枝稷对3种杂草具有化感作用,高浓度柳枝稷根、茎提取液对3种杂草种子萌发以及幼苗芽和根的生长具有一定的抑制作用;而低浓度的柳枝稷根、茎提取液对3种杂草种子萌发以及幼苗芽、根生长具有一定的促进作用。经LC-MS检测,柳枝稷含芦丁、槲皮素-3-O-鼠李糖苷以及槲皮素-3-O-葡萄糖苷3种化感物质。The germination rate,radicle length and embryo length of Eleusine indica,Amaranthus retroflexus and Setaria viridis seeds treated with different extract concentration of Panicum virgatum root and P.virgatumstem were determined to study the allelopathy of P.virgatumon seed germination rate and seedling growth of three weed varieties and provide a reference for biological control of weeds.Result：P.virgatumhas the allelopathy on E.indica,A.retroflexus and S.viridis.The higher extract concentration of P.virgatum root and P.virgatum stem has a certain inhibition effect on seed germination and seedling growth of three weed varieties but the lower extract concentration of P.virgatumroot and P.virgatumstem has a certain promotion effect on seed germination and seedling growth of three weed varieties.Three allelochemical components of rutin,quercetin-3-0-rhamnoside and quercetin-3-0-heteroside are detected in P.virgatumby LC-MS.

关 键 词：柳枝稷 杂草 化感作用 种子萌发 胚根长 胚芽长 

分 类 号：S184[农业科学—农业基础科学]