Acta Agrestia Sinica

Acta Agrestia Sinica ›› 2019, Vol. 27 ›› Issue (4): 859-866.DOI: 10.11733/j.issn.1007-0435.2019.04.009

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Relationship between Growth Characteristics and Stable Carbon Isotope of Artemisia scoparia in a Desert Steppe

SU Ying1,2, CHEN Lin1,2, LI Yue-fei1,2, MENG Wen-ting1,2, ZHU Zhong-you1,2, YUAN Chuang3, WANG Shi-ya3, Zhu Lin1,2   

  1. 1. Breeding Base for State Key Laboratory of Land Degradation and Ecological Restoration in Northwest China, Ningxia University, Yinchuan, Ningxia 750021, China;
    2. Key Laboratory for Restoration and Reconstruction of Degraded Ecosystem in Northwest China of Ministry of Education, Ningxia University, Yinchuan, Ningxia 750021, China;
    3. College of Agriculture, Ningxia University, Yinchuan, Ningxia 750021, China
  • Received:2019-05-08 Revised:2019-07-29 Online:2019-08-15 Published:2019-09-26

荒漠草原猪毛蒿的生长特征与稳定碳同位素间的关系

苏莹1,2, 陈林1,2, 李月飞1,2, 孟文婷1,2, 祝忠有1,2, 袁闯3, 王诗雅3, 朱林1,2   

  1. 1. 宁夏大学西北退化生态系统恢复与重建教育部重点实验室, 宁夏 银川 750021;
    2. 宁夏大学西北土地退化与 生态恢复国家重点实验室培育基地, 宁夏 银川 750021;
    3. 宁夏大学农学院, 宁夏 银川 750021
  • 通讯作者: 朱林
  • 作者简介:苏莹(1993-),女,陕西宝鸡人,硕士研究生,主要从事植物逆境生理研究,E-mail:suying2246@163.com;陈林(1983-),男,湖南湘乡人,助理研究员,博士研究生,主要从事恢复生态学研究,E-mail:chenlin198388@163.com
  • 基金资助:
    国家自然科学基金项目（31460123，31460161，41461046）；国家重点研发计划（2016YFC0500709）；宁夏自然科学基金（2018AAC03037）资助

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Abstract: The stable carbon isotope composition (δ13C) of plants reflects the adaptability of plants to drought environment. To study the survival strategy of Artemisia scoparia in desert steppe region,Artemisia scoparia was used as the test object,and the relationship among δ13C values,the soil factors,quantitative characteristics of population,and individual biomass allocation of Artemisia scoparia were analyzed. The results showed that the δ13C values of assimilation branch of Artemisia scoparia was distributed at -29.76‰~-25.10‰. The volumetric water content of soil and soil hardness had no significant effect on the δ13C values of assimilation branch of Artemisia scoparia. The correlation of δ13C values with density was significantly negative(P <0.05). The relationships of δ13C values with coverage,plant height and crown width was significantly positive (P<0.01). The δ13C values were significantly positively correlated with vegetative organ biomass,reproductive organ biomass,aboveground biomass,underground biomass and total biomass (P<0.01). There was a significantly positively correlation between vegetative organ biomass and reproductive organ biomass of Artemisia scoparia (P<0.01). In summary,there was a clear correlation among the δ13C values of assimilation branch of Artemisia scoparia,quantitative characteristics of population,and individual biomass allocation,indicating that Artemisia scoparia had an unique survival adaptation strategy to the desert steppe environment.

Key words: Desert steppe, Artemisia scoparia, Stable carbon isotope, Ecological adaptation, Soil water, Biomass allocation

摘要： 植物的稳定碳同位素组成（δ13C）能反映植物对干旱环境的适应能力。为研究荒漠草原区猪毛蒿（Artemisia scoparia）的生存策略，本研究以猪毛蒿为试验对象，分析了猪毛蒿同化枝δ13C值与土壤因子，种群数量特征，以及猪毛蒿个体生物量分配间的关系。结果表明：猪毛蒿同化枝δ13C值分布为-29.76‰~-25.10‰。试验区内土壤体积含水率、土壤硬度对猪毛蒿同化枝δ13C的影响不显著。δ13C值与密度呈显著负相关关系（P<0.05），与盖度、株高和冠幅呈极显著正相关关系（P<0.01）。δ13C值与营养器官生物量、繁殖器官生物量、地上生物量、地下生物量和总生物量均呈极显著正相关关系（P<0.01）；猪毛蒿营养器官生物量与繁殖器官生物量呈极显著正相关（P<0.01）。综上可得，猪毛蒿同化枝δ13C值与植株种群数量特征、个体生物量分配存在明显的相关性，表明猪毛蒿为适应荒漠草原环境，能够采取独特的生存适应策略。

关键词: 荒漠草原, 猪毛蒿, 稳定碳同位素组成, 生态适应, 土壤水分, 生物量分配

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