温带羊草草原退化对羊草根系形态特征的影响

doi:10.11733/j.issn.1007-0435.2025.10.002

草地学报 ›› 2025, Vol. 33 ›› Issue (10): 3147-3154.DOI: 10.11733/j.issn.1007-0435.2025.10.002

• 研究论文 • 上一篇

温带羊草草原退化对羊草根系形态特征的影响

杜金山¹, 蒲俊宇¹, 黄晶¹, 乔建霞², 苏颖佳¹, 邢志贤³, 洪逸楠¹, 钟小兰¹, 王新生¹, 刘克思¹

1. 中国农业大学草业科学与技术学院, 北京 100193;
2. 内蒙古自治区乌兰察布市草原工作站, 内蒙古乌兰察布 012000;
3. 河北省石家庄市生态环境监测中心, 河北石家庄 050037

收稿日期:2025-03-31 修回日期:2025-05-12 发布日期:2025-10-17
通讯作者: 刘克思,E-mail:kliu@cau.edu.cn
作者简介:刘克思,E-mail:kliu@cau.edu.cn
基金资助:
国家自然科学基金（32271764）；CARS专项资金（CARS-34）共同资助

Effects of Temperate Leymus chinensis Steppe Degradation on the Root Morphological Traits of Leymus chinensis

DU Jin-shan¹, PU Jun-yu¹, HUANG Jing¹, QIAO Jian-xia², SU Ying-jia¹, XING Zhi-xian³, HONG Yi-nan¹, ZHONG Xiao-lan¹, WANG Xin-sheng¹, LIU Ke-si¹

1. College of Grassland Science and Technology, China Agricultural University, Beijing 100193, China;
2. Grassland station of Ulanqab, Inner Mongolia Autonomous Region, Ulanqab, Inner Mongolia 012000, China;
3. Shijiazhuang Municipal Ecological Environment Monitoring Center, Shijiazhuang, Hebei Province 050037, China

Received:2025-03-31 Revised:2025-05-12 Published:2025-10-17

摘要/Abstract

摘要： 为揭示草地退化对优势种根系性状的影响，本研究以温带草原羊草（Leymus chinensis）为研究对象，设置未退化（Undegraded grassland， UD）、轻度退化（Lightly degraded grassland， L）、中度退化（Moderately degraded grassland， M）、重度退化（Highly degraded grassland， H）4种退化程度的草地，通过测定羊草根系总根长（Total root length， TRL）、根深度（Root depth，RD）、根体积（Root volume，RV）、表面积（Root surface area，RSA）、比根面积（Specific root area，SRA）、根系组织密度（Root tissue density，RTD）、比根长（Specific root length，SRL）和根长密度（Root length density，RLD），分析羊草根系对不同退化程度的响应。结果表明：重度退化草地中TRL（19.91 m）显著高于未退化草地（9.32 m），而RSA（19.12 cm² ）和SRL（5.51 m·g^-1）显著低于未退化草地（RSA为56.12 cm² ，SRL为14.34 m·g^-1）。轻度退化草地SRA（42.82 cm² ）高于其他退化草地；RTD随退化程度加剧而增加，重度退化草地最高（1.14 g·cm^-3）。研究表明，羊草通过调整根系形态特征来适应草地退化的胁迫。

关键词: 退化草地, 根系性状, 优势种, 温带羊草草原

Abstract: To investigate the impacts of grassland degradation on root traits of dominant species， we selected dominant species of temperate grasslands， Leymus chinensis， as object to evaluate its dynamics of root traits in four degradation level of grasslands： undegraded grassland （UD）， lightly degraded grassland （L）， moderately degraded grassland （M）， and highly degraded grassland （H）. The root traits included total root length （TRL）， root depth （RD）， root volume （RV）， root surface area （RSA）， specific root area （SRA）， root tissue density （RTD）， specific root length （SRL）， and root length density （RLD）. The results showed that TRL was significantly higher in highly degraded grassland （19.91 m） than in undegraded grassland （9.32 m）， while RSA （19.12 cm²） and SRL （5.51 m·g^-1） were significantly lower compared to undegraded grassland （RSA 56.12 cm²， SRL 14.34 m·g^-1）. SRAwas higher in lightly degraded grassland （42.82 cm² ） than in other degraded grasslands. RTD increased with increasing degradation intensity， reaching its maximum in highly degraded grassland （1.14 g·cm^-3）. These findings suggest that Leymus chinensis adapts to grassland degradation stress by altering root morphology.

Key words: Degraded grassland, Root traits, Dominant species, Temperate Leymus chinensis steppe

中图分类号:

S812.6

杜金山, 蒲俊宇, 黄晶, 乔建霞, 苏颖佳, 邢志贤, 洪逸楠, 钟小兰, 王新生, 刘克思. 温带羊草草原退化对羊草根系形态特征的影响[J]. 草地学报, 2025, 33(10): 3147-3154.

DU Jin-shan, PU Jun-yu, HUANG Jing, QIAO Jian-xia, SU Ying-jia, XING Zhi-xian, HONG Yi-nan, ZHONG Xiao-lan, WANG Xin-sheng, LIU Ke-si. Effects of Temperate Leymus chinensis Steppe Degradation on the Root Morphological Traits of Leymus chinensis[J]. Acta Agrestia Sinica, 2025, 33(10): 3147-3154.

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温带羊草草原退化对羊草根系形态特征的影响

Effects of Temperate Leymus chinensis Steppe Degradation on the Root Morphological Traits of Leymus chinensis

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