紫穗槐表型可塑性及植株资源分配对高寒生境的响应

摘要

17 morphological characteristic indexes and 11 nutritive elements of five different parts of Amorpha fruiticosa firstly planted in the Qinghai-Tibet Plateau（Lhasa,Maqu） were investigated to understand the response of phenotypic plasticity and plant resource allocation of Amorpha fruiticosa to alpine habitat.The results of this study showed that phenotypic differences of A.fruiticosa was found in the two investigation regions,especially,the root morphological indexes were greatly different.The biomass proportion and nutritive element concentrations of different parts of A.fruiticosa was different between Lhasa region and Maqu region,which was caused by the response of plant resource allocation to alpine habitat.The correlation relationship between morphological indexes and nutrient element concentrations of A.fruiticosa was complex among two regions.%对在西藏拉萨市和甘肃玛曲县青藏高原区种植的紫穗槐（Amorpha fruticosa）17项形态特征指标及其5个不同构件11种营养元素含量进行比较分析。结果表明,1）两地区紫穗槐表型特征存在差异,特别是地下部分形态指标差异显著;2）紫穗槐不同构件生物量比重、各个营养元素含量存在不同程度差异,且地区间相应指标也存在差异,是植株资源分配对高寒生境的响应所引起的;3）两地区紫穗槐形态指标与其营养元素含量均存在复杂的相关关系。