功能性状和立地条件决定树木根系NO3--N吸收能力
Functional traits and site conditions determine the NO3--N uptake capacity of tree root
[目的]养分是干旱瘠薄立地中树木生长的重要限制因素,树木对干旱瘠薄立地养分吸收利用方式决定其生态适应对策。论文通过野外原位测定根系氮吸收动力学及其与根系形态性状间的耦合关系研究,为揭示林木对干旱、瘠薄环境的适应机制奠定基础。[方法]以北京浅山区三种生长速度差异较大的观赏树种山桃、栓皮栎和元宝枫为对象,采用 NO3--N浓度梯度为 0.0、0.2、0.4、0.6、0.8、1.0 mmol·L-1 的改良霍格兰营养液,对生长在百望山森林公园两种立地中…查看全部>>
[Objectives]Nutrient is an important limiting factor for tree growth in arid and barren sites,and the way trees absorb and use nutrients in arid and barren sites determines their ecological adaptation strategies.In this paper,the dynamics of root nitrogen absorption and the coupling relationship between root morphological traits were measured in situ in the field,which laid a foundation for revealing the adaptation mechanism of trees to arid and barren envir…查看全部>>
于淼;徐程扬;
Q948.11
原位测定 立地条件 种间差异 NO3--N吸收 功能性状 细根觅食
in situ determination site condition different growth characteristics NO3--N uptake functional traits root foraging
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