...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Acta Physiologiae Plantarum >Response of Norway spruce root system to elevated atmospheric CO2 concentration
【24h】

Response of Norway spruce root system to elevated atmospheric CO2 concentration

机译：挪威云杉根系对大气CO2浓度升高的响应

获取原文
获取原文并翻译 | 示例
   

获取外文期刊封面封底 >>

       
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Root structure parameters, root biomass and allometric relationships between above- and belowground biomass were investigated in young Norway spruce (Picea abies [L.] Karst.) trees cultivated inside the glass domes with ambient (AC, 375 μmol(CO2) mol~(-1)) and elevated (EC, A + 375 μmol(CO2) mol~(-1)) atmospheric CO2 concentrations ([CO2]). After 8 years of fumigation, a mean EC tree in comparison with AC one exhibited about 37 % higher belowground biomass. The growth of primary root structure wasunaffected by elevated [CO2]; however, the biomass of secondary roots growing on the primary root structure and the biomass of secondary roots growing in the zone between the soil surface and the first primary root ramification were significantly higherin EC comparing with AC treatment about 58 and 70 %, respectively. The finest root’s (diameter up to 1 mm) biomass as well as length and surface area of both primary and secondary root structures showed the highest difference between the treatments; advancing EC to AC by 43 % on average. Therefore, Norway spruce trees cultivated under well-watered and rather nitrogen-poor soil conditions responded to the air elevated [CO2] environment by the enhancement of the secondary root structure increment, by enlargement of root length and root absorbing area, and also by alternation of root to aboveground organ biomass proportion. Higher root to leaf and root to stem basal area ratios could be beneficial for Norway spruce trees to survive periods with limited soil water availability.
机译：研究了玻璃穹顶内环境（AC，375μmol（CO2）mol〜（）的挪威云杉（Picea abies [L.] Karst。）幼树的根系结构参数，根系生物量以及地上和地下生物量之间的异位关系。 -1））和升高的（EC，A + 375μmol（CO2）mol〜（-1））大气CO2浓度（[CO2]）。熏蒸8年后，与AC相比，普通EC树的地下生物量高出约37％。 [CO2]升高不影响主根结构的生长。然而，相比于AC处理，EC处理的次生根在初级根结构上生长的生物量以及在土壤表面和初生根分枝之间的区域中生长的次级根的生物量分别显着高于AC处理约58％和70％。在处理之间，最细的根（直径最大1毫米）生物量以及初级和次级根结构的长度和表面积均显示出最大差异。 EC到AC的平均提升幅度为43％。因此，挪威云杉在水分充足且氮缺乏的土壤条件下种植，通过增加次生根系结构的增量，增加根长和吸收根系的面积以及轮换来应对空气中升高的[CO2]环境。根对地上器官生物量的比例较高的根叶和根茎干基面积比可能有益于挪威云杉树木在土壤水分有限的情况下生存。

著录项

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