...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Ecological research >Very fine roots respond to soil depth: biomass allocation, morphology, and physiology in a broad-leaved temperate forest
【24h】

Very fine roots respond to soil depth: biomass allocation, morphology, and physiology in a broad-leaved temperate forest

机译：极细的根对土壤深度有反应：阔叶温带森林中的生物量分配，形态和生理

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Very fine roots (<0.5mm in diameter) of forest trees may serve as better indicators of root function than the traditional category of < 2 mm, but how these roots will exhibit the plasticity of species-specific traits in response to heterogeneous soil nutrients is unknown. Here, we examined the vertical distribution of biomass and morphological and physiological traits of fine roots across three narrow diameter classes (<0.5, 0.5-1.0, and 1.0-2.0 mm) of Quercus serrata and Ilex pedunculosa at five soil depths down to 50 cm in a broad-leaved temperate forest. In both species, biomass and the allocation of very fine roots were higher in the surface soil but lower below 10-cm soil depth compared to values for larger roots (0.5-2.0 mm). When we applied these diameter classes, only very fine roots of Q. serrata exhibited significant changes in specific root length (SRL; m g~(-1)) and root nitrogen (N) concentrations with soil depth, whereas the N concentrations only changed significantly in I. pedunculosa. The SRL and root N concentrations of larger roots in the two species did not significantly differ among soil depths. Thus, very fine roots may exhibit species-specific traits and change their potential for nutrient and water uptake in response to soil depth by plasticity in root biomass, the length, and the N in response to available resources.
机译：与<2 mm的传统类别相比，林木的非常细的根（直径<0.5mm）可能是更好的根部功能指标，但是这些根如何响应异质土壤养分表现出物种特定性状的可塑性是未知。在这里，我们研究了5个低至50 cm的土壤深度的锯缘栎和锯齿冬青的三个窄直径类别（<0.5、0.5-1.0和1.0-2.0 mm）的生物量的垂直分布以及细根的形态和生理特征。在阔叶温带森林中。在这两个物种中，与较大根系（0.5-2.0 mm）相比，表层土壤中的生物量和非常细的根系分配较高，但在10 cm以下的土壤深度较低。当我们应用这些直径类别时，锯齿沙棘的非常细小的根系在特定根长（SRL; mg〜（-1））和根系氮（N）浓度上随土壤深度显示出显着变化，而N浓度仅显着变化在pedunculosa。两个物种中较大根的SRL和根氮浓度在土壤深度之间没有显着差异。因此，非常细的根可能表现出特定于物种的特性，并通过根生物量的可塑性，长度和氮对可利用资源的响应来响应土壤深度，从而改变其养分和水分吸收的潜力。

著录项

  • 来源
    《Ecological research》 |2011年第1期|p.95-104|共10页
  • 作者

    Naoki Makita; Yasuhiro Hirano; Takeo Mizoguchi; Yuji Kominami; Masako Dannoura; Hiroaki Ishii; Leena Finer; Yoichi Kanazawa;

  • 作者单位

    Graduate School of Agricultural Science, Kobe University, Kobe 657-8501, Japan,Division of Environmental Science and Technology, Graduate School of Agriculture, Kyoto University, Kyoto 606-8502, Japan;

    Kansai Research Center, Forestry and Forest Products Research Institute, Kyoto 612-0855, Japan,Graduate School of Environmental Studies, Nagoya University, Nagoya 464-8601, Japan;

    Kansai Research Center, Forestry and Forest Products Research Institute, Kyoto 612-0855, Japan;

    Kansai Research Center, Forestry and Forest Products Research Institute, Kyoto 612-0855, Japan;

    Division of Environmental Science and Technology, Graduate School of Agriculture, Kyoto University, Kyoto 606-8502, Japan;

    Graduate School of Agricultural Science, Kobe University, Kobe 657-8501, Japan;

    Finnish Forest Research Institute, Joensuu Research Unit, 80101 Joensuu, Finland;

    Graduate School of Agricultural Science, Kobe University, Kobe 657-8501, Japan;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    nitrogen; root distribution; soil layer; species-specific trait; specific root length;

    机译：氮;根分布;土层;种特质比根长;

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号