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Burial depth and diameter of the rhizome fragments affect the regenerative capacity of a clonal shrub

机译：根茎碎片的埋藏深度和直径影响克隆灌木的再生能力

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摘要

Clonal plants in highly disturbed habitats are often broken into small fragments of various sizes and buried at various soil depths. As a storage organ, rhizome fragments play an important role in enabling plants to survive in such habitats. But few studies have been concerned about the regenerative capacity of rhizome fragments of clonal shrubs of different rhizome diameter and at different burial depths. Here, we investigated whether deeper burial decreased, and diameter of the rhizome fragment increased, the regenerative capacity of a clonal shrub. Research samples of rhizome fragment (rhizome diameters of 2, 5, 10, 15, and 20 mm) of the clonal shrub Calligonum arborescens were buried at different depths (0, 1, 5, 10, and 20 cm). Increasing the diameter of the rhizome fragments significantly increased the survival rate of fragments, and increased the above-ground, below-ground and total biomass production of fragments. Vegetative reproduction ability also increased with an increase in diameter of the rhizome fragments. With an increase in sand burial depth, above-ground, below-ground, total biomass production and vegetative reproduction ability first decreased and then increased, and no fragments survived at the 0 cm burial depth. These results indicate that sand burial depth and diameter of the rhizome fragments significantly affected the regeneration capacity of C. arborescens. Sand burial is one of the essential prerequisites for C. arborescens rhizome fragments' survival. Moderate burial depth (5 cm) and larger fragment diameter (20 mm diameter) were more suitable for biomass production and vegetative reproduction. These results indicate that reserves stored in rhizome fragments can contribute greatly to the regeneration capacity of the C. arborescens-responses that are very important for C. arborescens survival and establishment in frequently disturbed habitats. (C) 2015 Elsevier B.V. All rights reserved.
机译：高度受干扰的栖息地中的克隆植物通常被分成各种大小的小碎片，并埋在不同的土壤深度。根茎片段作为一种储存器官，在使植物能够在这种栖息地中生存方面发挥着重要作用。但是，很少有研究关注不同根茎直径和不同埋葬深度的无性灌木的根茎碎片的再生能力。在这里，我们调查了更深的埋葬是否减少，根茎片段的直径增加，克隆灌木的再生能力。将无性灌木Calligonum arborescens的根茎片段（根茎直径为2、5、10、15和20 mm）的研究样品埋在不同深度（0、1、5、10和20 cm）。根茎片段直径的增加显着提高了片段的存活率，并增加了片段的地上，地下和总生物量产量。营养繁殖能力也随着根茎片段直径的增加而增加。随着沙埋深度的增加，地上，地下的总生物量产量和无性繁殖能力先下降然后增加，在0 cm的埋深下没有碎片存活。这些结果表明，沙土的埋藏深度和根茎片段的直径显着影响了乔木的再生能力。埋葬沙土是C. arborescens根茎片段存活的必要先决条件之一。适当的埋葬深度（5厘米）和较大的碎片直径（直径20毫米）更适合生物质生产和营养繁殖。这些结果表明，储存在根茎片段中的储藏物可以极大地促进乔木梭菌的再生能力，这对于频繁扰动的栖息地中的乔木梭菌生存和建立非常重要。 （C）2015 Elsevier B.V.保留所有权利。

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  • 来源
    《Ecological Complexity》 |2015年第9期|34-40|共7页
  • 作者

    Luo Weicheng; Zhao Wenzhi;

  • 作者单位

    Chinese Acad Sci, Linze Inland River Basin Res Stn, Key Lab Inland River Basin Ecohydrol, Cold & Arid Reg Environm & Engn Res Inst, Lanzhou, Peoples R China;

    Chinese Acad Sci, Linze Inland River Basin Res Stn, Key Lab Inland River Basin Ecohydrol, Cold & Arid Reg Environm & Engn Res Inst, Lanzhou, Peoples R China;

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  • 正文语种 eng
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  • 关键词

    Clonal shrub; Rhizome fragment; Burial depth; Biomass production; Regeneration capacity;

    机译：克隆灌木;根茎片段;埋藏深度;生物量产生;再生能力;

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