草地学报 ›› 2022, Vol. 30 ›› Issue (7): 1773-1780.DOI: 10.11733/j.issn.1007-0435.2022.07.019

• 研究论文 • 上一篇    

高寒退化禾本科混播草地地下芽库特征与群落持续性初探

刘婉婷1, 曹文侠1, 王文虎1, 王辛有1, 王世林1, 邓秀霞1, 李文2, 师尚礼1   

  1. 1. 甘肃农业大学草业学院/草业生态系统教育部重点实验室, 中-美草地畜牧业可持续发展研究中心, 甘肃 兰州 730070;
    2. 青海省畜牧兽医科学院(青海大学畜牧兽医科学院), 青海 西宁 810016
  • 收稿日期:2021-12-30 修回日期:2022-02-21 发布日期:2022-08-02
  • 通讯作者: 曹文侠,E-mail:caowx@gsau.edu.cn
  • 作者简介:刘婉婷(1997-),女,汉族,甘肃庆阳人,硕士研究生,主要从事草地资源与生态方向的研究,E-mail:1339460931@qq.com
  • 基金资助:
    国家自然基金地区科学基金(32060269);国家现代农业产业技术体系(CARS-34)共同资助

Characteristics of Underground Bud Bank and Community Persistence in Alpine Degraded Gramineous Mixed Sowing Grassland

LIU Wan-ting1, CAO Wen-xia1, WANG Wen-hu1, WANG Xin-you1, WANG Shi-lin1, DENG Xiu-xia1, LI Wen2, SHI Shang-li1   

  1. 1. Grassland Science College of Gansu Agricultural University, Grassland Ecosystem Key Laboratory of Ministry of Education, Sino-U. S. Research Centers for Sustainable Grassland and Livestock Management, Lanzhou, Gansu Province 730070, China;
    2. Qinghai Academy of Animal and Veterinary Sciences (Academy of Animal and Veterinarty Sciences, Qinghai University), Xining, Qinghai Province 810016, China
  • Received:2021-12-30 Revised:2022-02-21 Published:2022-08-02

摘要: 为探明多年生不同混播组合草地退化后的群落稳定性和可持续性,本研究以祁连山金强河地区22年前建植的6种混播草地为研究对象,对草地群落结构及地下芽库构成进行调查分析。结果表明:4组分混播草地能够较好的保留建植种的地下芽,且以建植种分蘖芽为主,而3组分混播草地地下芽主要由侵入种的分蘖芽、根茎芽、根颈芽和根蘖芽构成,建植种芽密度占比较低;分蘖芽密度与建植种植物盖度、密度和地上生物量正相关,根茎芽、根颈芽、根蘖芽密度与侵入种植物盖度、密度和地上生物量正相关。其中,混播组合“冷地早熟禾(Poa crymophila)+多叶老芒麦(Elymus sibiricus)+无芒雀麦(Bromus inermis)+扁穗冰草(Agropgyron cristatum)”草地地下芽结构最优,可适当延长混播草地使用年限,是适宜青藏高原高寒地区的混播草种组合。

关键词: 退化草地, 混播模式, 芽库, 群落持续性

Abstract: To investigate the community stability and sustainability after the degradation of different perennial mixed sowing combinations,we investigated and analyzed the community structure and underground bud bank composition of six kinds of mixed sowing grassland established 22 years ago in Jinqianghe area of Qilian Mountains. The results showed as follows:In the 4-component mixed-planting grassland,the bud bank of the establishment species was better preserved,and the bud density of the establishment species was mainly tiller buds. However,the underground bud bank of the 3-component mixed-planting grassland was mainly composed of tiller buds,rhizome buds,root-derived buds,and crown buds of the invasive species,and the proportion of bud density of establishment species was low. The density of tiller buds was positively correlated with coverage,density,and aboveground biomass of establishment species,while the density of rhizome buds,root-derived buds,and crown buds were positively correlated with coverage,density,and aboveground biomass of invasive species. Among them,the mixed sowing combination "Poa crymophila+Elymus sibiricus+Bromus inermis+Agropgyron cristatum" was the best underground bud structure,and could prolong the service life of mixed grassland appropriately. Therefore,the mixed sowing combination was suitable for the alpine region of Qinghai-Tibet Plateau.

Key words: Degraded grassland, Mixed mode, Bud bank, Community persistence

中图分类号: