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首页> 外文期刊>Clean >Influence of Soil Nutrient Heterogeneity and Competition on Sprouting and Ramets Growth of Alternanthera philoxeroides
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Influence of Soil Nutrient Heterogeneity and Competition on Sprouting and Ramets Growth of Alternanthera philoxeroides

机译：土壤养分异质性和竞争性对喜旱莲子菜发芽和分株生长的影响

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摘要

Environmental heterogeneity and plant competition influence plant vegetative sprouting and ramets growth. Many major invasive plants reproduce largely or exclusively by vegetative propagation. The terrestrial invasive Alternanthera philoxeroides mainly regenerates from fleshy roots. Here, it is tested whether resource heterogeneity and intraspecific competition influence the fleshy root sprouting and ramet growth of this species. Four or twelve similar-sized fleshy roots of A. philoxeroides are grown in two soil substrates that are either homogeneous or heterogeneous but have the same total amount of nutrients. After 6 months, the sprouting and ramet growth traits (i.e., ramet number, leaf traits, biomass and biomass allocation) are analyzed. The fleshy root density significantly affects the sprouting and ramet growth traits, but the soil nutrient heterogeneity does not. The sprouting and ramet growth traits decrease in the treatments with high densities of fleshy roots. These results suggest that intraspecific competition has a greater influence on the root sprouting and ramet growth of the invasive terrestrial A. philoxeroides than soil nutrient heterogeneity. Thus, intraspecific competition can limit the establishment of terrestrial A. philoxeroides.
机译：环境异质性和植物竞争影响植物的营养发芽和分株的生长。许多主要的入侵植物主要或仅通过营养繁殖繁殖。陆地侵染性天南星菌主要从肉质根再生。在这里，测试了资源异质性和种内竞争是否影响该物种的肉质根萌芽和分株生长。在两种土壤基质中均生长有四个或十二个相似大小的拟南芥肉质根，这些基质是均质的或异质的，但养分总量相同。 6个月后，分析发芽和分株的生长性状（即分株数，叶片性状，生物量和生物量分配）。肉质根的密度显着影响发芽和分株的生长特性，但土壤养分异质性却不受影响。在高密度肉质根处理中发芽和分株生长性状下降。这些结果表明，与土壤养分异质性相比，种内竞争对入侵性陆地拟南芥的根萌发和分株生长的影响更大。因此，种内竞争可以限制陆生A.philoxeroides的建立。

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  • 来源
    《Clean》 |2019年第2期|1800182.1-1800182.6|共6页
  • 作者

    Yu Hongwei; Shen Nan; Guan Xin; Yu Siqi; Yu Dan; Liu Chunhua;

  • 作者单位

    Wuhan Univ, Coll Life Sci, Dept Ecol, Natl Field Stn Freshwater Ecosyst Liangzi Lake, Wuhan 430072, Hubei, Peoples R China;

    Wuhan Univ, Coll Life Sci, Dept Ecol, Natl Field Stn Freshwater Ecosyst Liangzi Lake, Wuhan 430072, Hubei, Peoples R China;

    Wuhan Univ, Coll Life Sci, Dept Ecol, Natl Field Stn Freshwater Ecosyst Liangzi Lake, Wuhan 430072, Hubei, Peoples R China;

    Wuhan Univ, Coll Life Sci, Dept Ecol, Natl Field Stn Freshwater Ecosyst Liangzi Lake, Wuhan 430072, Hubei, Peoples R China;

    Wuhan Univ, Coll Life Sci, Dept Ecol, Natl Field Stn Freshwater Ecosyst Liangzi Lake, Wuhan 430072, Hubei, Peoples R China;

    Wuhan Univ, Coll Life Sci, Dept Ecol, Natl Field Stn Freshwater Ecosyst Liangzi Lake, Wuhan 430072, Hubei, Peoples R China;

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