Strategies of nitrogen cycling of Phragmites australis at two sites differing in nutrient availability
Strategies of nitrogen cycling of Phragmites australis at two sites differing in nutrient availability
复制标题
两个不同养分有效性地点芦苇氮循环策略
DOI：
10.1002/iroh.19970820108
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发表时间：
1997
影响因子：
1.9
通讯作者：
J. Kohl
中科院分区：
文献类型：
--
作者：
Harald Kühl;P. Woitke;J. Kohl
地下生物量和氮含量测定在两个遗传同质芦苇不同的形态，生产力，和养分供应。地上现存量和根茎生物量之间的比较比例，发现在这两个网站，而根生物量/地上现存量的比例显着较高的养分贫乏的网站。氮含量的动态调查揭示了显着的差异，氮转运到根茎之间的调查克隆，表明两个生理生态策略的存储行为。这两种策略可以分别归属于“同化型”和“易位型”。这两种类型的修改定义。
Below-ground biomass and nitrogen content were determined at two genetically homogeneous Phragmites stands differing in morphology, in productivity, and in nutrient supply. Comparable ratios between above-ground standing crop and rhizome biomass were found at both sites, whereas the root biomass/above standing crop ratio was significantly higher at the nutrient poor site. Investigations on the dynamics of nitrogen content revealed distinct differences in nitrogen translocation to the rhizomes between the investigated clones indicating two ecophysiological strategies in storage behaviour. These two strategies could be attached to the “assimilation type” and to the “translocation type”, respectively. A modified definition of both types is presented.