• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Nitrogen >Nitrogen Pools in Tropical Plantations of N 2 -Fixing and Non-N 2 -Fixing Legume Trees under Different Tree Stand Densities
【24h】

Nitrogen Pools in Tropical Plantations of N 2 -Fixing and Non-N 2 -Fixing Legume Trees under Different Tree Stand Densities

机译：在N 2的热带种植园中的氮气池 - 不同树立密度下的混浊和非N 2 - 混乱豆科树

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

摘要

We investigated the nitrogen pools in monocultures of legume species widely used in reforestation in Brazil that have contrasting growth and nitrogen acquisition strategies. The plantations were established with the slow-growing and N2-fixing tree Anadenanthera peregrina var. peregrina, and the fast-growing and non-fixing tree Schizolobium parahyba var. amazonicum. The measurements of N pools in the tree biomass and the soil followed standard methods and were carried out on 54 experimental plots. The N2 fixation pools were evaluated by abundance natural of 15N and the N accretion methods. The soil N content was of similar magnitude between species and stand densities. The species showed similar amounts of N in the biomass, but divergent patterns of N accumulation, as well as the 15N signature on the leaves. S. parahyba accumulated most N in the stem, while A. peregrina accumulated N in the roots and leaves. However, the N accumulation in biomass of A. peregrina stand was less constrained by environment than in S. parahyba stands. The percentage of N derived from N2 fixation in A. peregrina stands decreased with the increase of stand density. The biological N2 fixation estimates depended on the method and the response of tree species to environment.
机译：我们调查了在巴西重新造林的豆类物种的单一栽培中的单一栽培中的氮气池，其具有对比的生长和氮素采购策略。该种植园是用生长缓慢的和N2固定树Anadenanthera Peregrina Var建立的。 Peregrina，以及快速生长和不固定的树木鞘津属Parahyba var。 Amazonicum。树木生物量和土壤中的N池的测量为标准方法，并在54个实验图上进行。通过15N的丰富自然评估N2固定池和N accretion方法。土壤n含量在物种和立体密度之间具有相似的幅度。这些物种在生物质中显示出类似的N，但是N积累的不同模式，以及叶子上的15N签名。 S. Parahyba在茎中累积了大部分n，而A.Peregrina在根和叶中累积了n。然而，A.Peregrina Stand的生物量的N积累受到环境的限制而不是S. Parahyba站在S.中。随着支架密度的增加，来自A.Peregrina的N2固定的N的N的百分比降低。生物N2固定估计取决于树种对环境的方法和响应。

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