Guo Ru, Wen Zhong-ming, Wang Hong-xia, Qi De-hui
Ying Yong Sheng Tai Xue Bao. 2015 Dec;26(12):3627-33.
This article selected zonal plant communities as the research objects in different vegetation zones in Yanhe River basin. We measured six leaf traits of the dominant species and main accompanying species in each community, and then analyzed the relationships and their changes along with environmental gradients between these traits in order to understand the plant adaptation strategies to the environment changes. The results showed that the specific leaf area was significantly negatively correlated to leaf tissue density, area-based leaf nitrogen and phosphorus concentrations, and significantly positively correlated to mass-based leaf phosphorus concentration. Both the scaling relationships among these traits and plant life strategies were different among the three vegetation zones, the scaling-dependent relationship between leaf tissue density and specific leaf area was stronger in steppe and forest-steppe zones than in forest zone, but the correlations among area-based leaf nitrogen/phosphorus concentrations and specific leaf area and leaf tissue density were more significant in forest zone than in steppe zone. In the arid grassland and forest-steppe zone, plants give priority to defensive and stress resistance strategies, and in relatively moist nutrient-rich forest zone, plants give priority to fast growth and resource optimization allocation strategies.
本文选取延河流域不同植被带的地带性植物群落作为研究对象。我们测定了每个群落中优势种和主要伴生种的6个叶片性状，然后分析这些性状之间的关系及其沿环境梯度的变化，以了解植物对环境变化的适应策略。结果表明，比叶面积与叶片组织密度、单位叶面积氮磷含量呈显著负相关，与单位质量叶磷含量呈显著正相关。这三个植被带的这些性状之间的异速生长关系和植物生活策略各不相同，草原和森林草原带叶片组织密度与比叶面积之间的异速生长依赖关系比森林带更强，但单位叶面积氮/磷含量与比叶面积和叶片组织密度之间的相关性在森林带比草原带更显著。在干旱草原和森林草原带，植物优先采用防御和抗逆策略，而在相对湿润、养分丰富的森林带，植物优先采用快速生长和资源优化分配策略。
