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植物研究 ›› 2017, Vol. 37 ›› Issue (1): 37-44.doi: 10.7525/j.issn.1673-5102.2017.01.006

• 论文 • 上一篇    下一篇

生物结皮对古尔班通古特沙漠3种荒漠草本植物生长特性与元素吸收的影响

庄伟伟1,2, 周晓兵3, 张元明3   

  1. 1. 新疆师范大学生命科学学院, 新疆特殊环境物种保护与调控生物学实验室, 乌鲁木齐 830054;
    2. 新疆师范大学生命科学学院, 干旱区植物逆境生物学实验室, 乌鲁木齐 830054;
    3. 中国科学院新疆生态与地理研究所, 中国科学院干旱区生物地理与生物资源重点实验室, 乌鲁木齐 830011
  • 收稿日期:2016-09-20 出版日期:2017-01-15 发布日期:2017-03-06
  • 通讯作者: 张元明,E-mail:zhangym@ms.xjb.ac.cn E-mail:zhangym@ms.xjb.ac.cn
  • 作者简介:庄伟伟(1986-),女,博士,主要从事干旱区植物生理生态方面的研究工作。
  • 基金资助:
    新疆维吾尔自治区自然科学基金项目(2016D01B049)

Effects of Biological Soil Crusts on Growth and Nutrient Uptake in Three Desert Herbs in the Gurbantunggut Desert,Northwestern China

ZHUANG Wei-Wei1,2, ZHOU Xiao-Bing3, ZHANG Yuan-Ming3   

  1. 1. Xinjiang Key Laboratory of Special Species Conservation and Regulatory Biology, College of Life Sciences, Xinjiang Normal University, Urumqi 830054;
    2. Key Laboratory of Plant Stress Biology in Arid Land, College of Life Sciences, Xinjiang Normal University, Urumqi 830054;
    3. Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Key Laboratory of Bioresource in Arid Land, Chinese Academy of Sciences, Urumqi 830011
  • Received:2016-09-20 Online:2017-01-15 Published:2017-03-06
  • Supported by:
    The Natural Science Foundation of Xinjiang Uygur Autonomous Region(2016D01B049)

摘要: 生物结皮有可能通过物理、水文、养分循环影响与之相邻的维管植物,但二者相互关系尚存在着争议。本文以新疆古尔班通古特沙漠广泛分布的地衣结皮为研究对象,分析了生物结皮对3种荒漠草本植物:尖喙牻牛儿苗(Erodium oxyrrhynchum)、条叶庭芥(Alyssum linifolium)和琉苞菊(Hyalea pulchella)的生长及其对元素吸收的影响。研究结果表明:(1)生物结皮对3种荒漠草本植物生长的影响在生长期不同阶段存在差异。在前期,生物结皮的存在促进了植物生物量的累积;而后期,生物结皮却抑制了植物生长。生物结皮的存在显著影响了荒漠草本植物生物量的累积和冠根比。(2)生物结皮的存在显著增加了3种荒漠草本植物对N和K的吸收,而对P的吸收没有显著影响。生物结皮对3种植物Cu、Ca、Mg、Na、Cl的吸收存在种间差异。本研究结果将为该荒漠生态系统潜在的植被演替方向提供重要的科学根据。

关键词: 生物结皮, 生长, 营养元素吸收, 荒漠草本植物, 古尔班通古特荒漠

Abstract: As an important component for desert ecosystem, biological soil crusts(biocrusts) may possibly affect adjacent vascular plants via hydrology, soil erosion and nutrient cycling, while experimental evidences are still scarce and controversial. In the present research, we attempted to experimentally investigate whether and how biocrusts affect growth and nutrient uptake in vascular plants of the Gurbantunggut Desert. We conducted the experiments to examine the effects of biocrusts on growth and nutrient uptake in three widely distributed species of Erodium oxyrrhynchum, Alyssum linifolium and Hyalea pulchella. The results showed that the effects of biocrusts on the growth of three desert vascular plants were different in different growing phases. The biomass the three species in crusted soils were higher than those in uncrusted soils in the early growth period and lower in the later part of the growing period. While biocrusts did not significantly affect the biomass allocation between shoot and root. Biocrusts also influenced nutrient uptake by plants, especially promoting uptake of N and K, while did not affect the uptake of P. The influence on uptake of other elements(Cu, Ca, Mg, Na, Cl) was species-specific. We expect to provide important scientific basis on the potential vegetation succession direction in this desert ecosystem.

Key words: biological soil crusts, growth, nutrient uptake, desert herbs, the Gurbantunggut Desert

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