...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Forestry Research >Decomposition patterns of leaf litter of seven common canopy species in a subtropical forest: dynamics of mineral nutrients
【24h】

Decomposition patterns of leaf litter of seven common canopy species in a subtropical forest: dynamics of mineral nutrients

机译：亚热带森林中七个常见树冠物种的凋落物分解模式：矿质养分的动态

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

Dynamical patterns of mineral elements during decomposition processes were investigated for seven common canopy species in a subtropical evergreen broad-leaved forest by means of litterbag technique over 2 years. The species studied are representative for the vegetation in the study area and differed significantly in chemical qualities of their litter. No significant relationships were found between decomposition rate (percentage dry mass remaining and decomposition constant k) and initial element concentrations. However, there were significant correlations between the percentage of dry mass remaining and the mineral element concentrations in the remaining litter for most cases. The rank of the element mobility in decomposition process was as follows: Na = K > Mg ≧ Ca > N ≧ Mn ≧ Zn ≧ P > Cu > > Al > > Fe. Concentrations of K and Na decreased in all species as decomposition proceeded. Calcium and Mg also decreased in concentration but with a temporal increase in the initial phase of decomposition, while the concentrations of other elements (Zn, Cu, Al, and Fe) increased for all species with exception of Mn which revealed a different pattern in different species. In most species, microelements (Cu, Al, and Fe) significantly increased in absolute amounts at the end of the litterbag incubation, which could be ascribed to a large extent to the mechanism of abiotic fixation to humic substances rather than biological immobilization.
机译：利用垃圾袋技术研究了亚热带常绿阔叶林中7种常见冠层物种在分解过程中矿物元素的动态模式，历时2年。所研究的物种代表了研究区域的植被，其凋落物的化学性质也有很大差异。在分解速率（剩余干质量百分数和分解常数k）与初始元素浓度之间未发现显着关系。但是，在大多数情况下，剩余干物质百分比与剩余垃圾中矿物质元素浓度之间存在显着相关性。分解过程中元素迁移率的等级如下：Na ＝ K＞Mg≥Ca＞N≥Mn≥Zn≥P＞ Cu ＞＞ Al ＞＞ Fe。随着分解的进行，所有物种的钾和钠的浓度均下降。钙和镁的浓度也降低，但分解的初始阶段随时间增加，而所有物种的其他元素（锌，铜，铝和铁）的浓度均增加，其中锰除外，锰在不同物种中表现出不同的模式种类。在大多数物种中，垃圾袋孵化结束时，微量元素（铜，铝和铁）的绝对量显着增加，这在很大程度上可归因于非生物固定于腐殖质而不是生物固定的机制。

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