...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Biology Bulletin >Specific Features Of Nitrogen Transformation In The Gut And Coprolites Of Earthworms
【24h】

Specific Features Of Nitrogen Transformation In The Gut And Coprolites Of Earthworms

机译：The肠道和共腐殖质中氮转化的特征

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

It has been found that nitrogenase activity in the guts and coprolites of three earthworm species (Lumbricus terrestris, Aporrectodea rosea, and Aporrectodea caliginosa) is one to three orders of magnitude higher than that in the control soil. In A. caliginosa earthworms, the actual nitrogenase activity remains high upon keeping them in soils of different types. However, it reaches a peak in the gut lumen and decreases to a minimum on its wall, which is evidence for a major role of transitional microflora in intestinal nitrogen fixation. Nitrogen fixation activity in freshly excreted coprolites decreases to one-half or one-third of that in the gut and then increases again, reaching a peak on days 3-5 of exposure in the soil. According to the results of multisub-strate testing, the functional diversity of nitrogen-fixing soil microorganisms increases in the course of passage through the earthworm gut. Thus, the microbial community in coprolites retains its functional potential and, within a few days, shows the second peak of activity in the soil. Due to a short-term increase in the rate of nitrogen fixation, coprolites contain a pool of bound amino acids, which become involved in the formation of new humus substances.
机译：现已发现，三种（（Lumbricus terrestris，Aporrectodea rosea和Aporrectodea caliginosa）的肠道和粪便中的固氮酶活性比对照土壤中的高1至3个数量级。在caligonosa worm中，将它们保留在不同类型的土壤中时，实际的固氮酶活性仍然很高。然而，它在肠腔中达到峰值，并在其壁上降低到最小，这证明了过渡微生物区系在肠道固氮中的主要作用。新鲜排泄的proprolites中的固氮活性下降至肠道中的一半或三分之一，然后再次增加，在土壤中暴露第3-5天达到峰值。根据多底物测试的结果，固氮土壤微生物通过through肠道的过程中其功能多样性增加。因此，共腐殖质中的微生物群落保留了其功能潜力，并在几天之内显示了土壤中活性的第二高峰。由于氮固定速率的短期增加，共腐殖质包含大量结合的氨基酸，这些氨基酸参与了新腐殖质物质的形成。

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