黄土高原常见蒿属植物对4种豆科牧草种子萌发和幼苗生长的化感作用  

Allelopathy of Common Artemisia Plants on Seed Germination and Seedling Growth of Four Excellent Legumes in the Loess Plateau

作　　者：雷威肖 陈巧玲 陈康丽 刘晶[1] 郭梁 金晶炜[4] 程积民[1] 李伟[4] LEI Wei-xiao;CHEN Qiao-ling;CHEN Kang-li;LIU Jing;GUO Liang;JIN Jing-wei;CHENG Ji-min;LI Wei(College of Grassland Agriculture,Northwest A&F University,Yangling 712100,China;Institute of Innovation Ecology,Lanzhou University,Lanzhou 730000,China;Institute of Tropical Agriculture and Forestry,Hainan University,Haikou 570100,China;Institute of Soil and Water Conservation,Northwest A&F University,Yangling 712100,China)

机构地区：[1]西北农林科技大学草业与草原学院,陕西杨凌712100 [2]兰州大学生态学创新研究院,甘肃兰州730000 [3]海南大学热带农林学院,海南海口570100 [4]西北农林科技大学水土保持研究所,陕西杨凌712100

出　　处：《中国草地学报》2020年第1期21-30,共10页Chinese Journal of Grassland

基　　金：国家重点研发计划“北方农牧交错带草地退化机理及生态修复技术集成示范”(2016YFC0500700);国家自然科学基金(41601586,41701606);中国典型自然保护区保护成效评估——云雾山草原(KFJ-SW-YW028-07);中国博士后科学基金特别资助(2018T111100)。

摘　　要：黄土高原常见蒿属植物铁杆蒿、大籽蒿和狭裂白蒿叶枯落物对豆科牧草红豆草、紫花苜蓿、沙打旺和百脉根种子萌发及幼苗生长的影响研究表明:3种常见蒿属植物对4种豆科牧草种子发芽率、发芽势及幼苗地上、地下生物量(鲜重和干重)和叶丙二醛(MDA)含量影响不同,但其综合化感效应总体上均呈现低质量浓度促进、高质量浓度抑制。在1g/L和10g/L浓度三种蒿浸提液中促进效应最大的牧草是沙打旺;除了100g/L铁杆蒿对红豆草的综合化感效应表现出促进外,其余100g/L三种蒿浸提液对4种豆科牧草均呈现不同程度的抑制作用。In order to study the allelopathy of Artemisia on the seed germination and seedling growth of legumes in the Loess plateau,we measured the effects of the leaf litter of Artemisia species(Artemisia gmelinii,Artemisia sieversiana and Artemisia kanashiroi)on seed germination and seedling growth of four legume forage(Onobrychis viciaefolia,Astragalus adsurgens,Lotusc corniculatus and Medicago sativa)in the Loess plateau.The results demonstrated that three common Artemisia plants had different effects on seed germination rate,germination potential,aboveground and underground biomass(fresh and dry weight)and MDA content of four legumes,but allelic effect showed the trend of“promotion of lower concentration,but inhibition of higher concentration”.In the extracts of three species of Artemisia plants with concentration of 1g/L and 10g/L,the forage with the strongest promotion effect was A.adsurgens;in the extracts with 100g/L,except for the promotion of the Artemisia gmelinii effect of Artemisia on O.viciaefolia,the extracts of the other two species of Artemisia showed different degrees of inhibition on the four legumes.

关 键 词：铁杆蒿 大籽蒿 狭裂白蒿 化感作用 豆科牧草 

分 类 号：Q945.79[生物学—植物学]