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荒漠草原猪毛蒿的生长特征与稳定碳同位素间的关系
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  • 英文篇名:Relationship between Growth Characteristics and Stable Carbon Isotope of Artemisia scopariain a Desert Steppe
  • 作者:苏莹 ; 陈林 ; 李月飞 ; 孟文婷 ; 祝忠有 ; 袁闯 ; 王诗雅 ; 朱林
  • 英文作者:SU Ying;CHEN Lin;LI Yue-fei;MENG Wen-ting;ZHU Zhong-you;YUAN Chuang;WANG Shi-ya;Zhu Lin;Breeding Base for State Key Laboratory of Land Degradation and Ecological Restoration in Northwest ChinaNingxia University;Key Laboratory for Restoration and Reconstruction of Degraded Ecosystem in Northwest China of Ministry of Education,Ningxia University;College of Agriculture,Ningxia University;
  • 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
  • 英文关键词:Desert steppe;;Artemisia scoparia;;Stable carbon isotope;;Ecological adaptation;;Soil water;;Biomass allocation
  • 中文刊名:草地学报
  • 英文刊名:Acta Agrestia Sinica
  • 机构: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;宁夏大学农学院;
  • 出版日期:2019-07-15
  • 出版单位:草地学报
  • 年:2019
  • 期:04
  • 基金: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
  • 语种:中文;
  • 页:74-81
  • 页数:8
  • CN:11-3362/S
  • ISSN:1007-0435
  • 分类号:S812
摘要
植物的稳定碳同位素组成(δ~(13)C)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δ~(13)C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δ~(13)C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δ~(13)C的影响不显著。δ~(13)C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)。δ~(13)C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δ~(13)C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。
        The stable carbon isotope composition(δ~(13)C)of plants reflects the adaptability of plants to drought environment.To study the survival strategy of Artemisia scopariain desert steppe region,Artemisia scoparia was used as the test object,and the relationship among δ~(13)C values,the soil factors,quantitative characteristics of population,and individual biomass allocation of Artemisia scoparia were analyzed.The results showed that the δ~(13)C 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 theδ~(13)C values of assimilation branch of Artemisia scoparia.The correlation of δ~(13)C values with density was significantly negative (P <0.05).The relationships of δ~(13)C values with coverage,plant height and crown width was significantly positive (P<0.01).The δ~(13)C 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 Artemisiascoparia (P<0.01).In summary,there was a clear correlation among the δ~(13)C 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.
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