摘要
利用室外盆栽方法,就8种一年生植物的相对生长率、比叶面积、叶干物质含量、株高、根深和单位叶面积根量等6个功能特征与生物量的关系进行了研究.结果表明实验所采用的8个植物种类在株高、相对生长率、叶干物质含量、比叶面积、根深、单位叶面积根量等功能特征方面表现出较大的差异,因而在生物量生产上也表现出显著差异.相关分析结果表明:植物地上生物量分别与相对生长率、比叶面积、株高和根深等功能特征显著正相关,与叶干物质含量不相关,而与单位叶面积根量负相关.在本实验条件下,相对生长率、比叶面积、株高、根深和单位叶面积根量5个功能特征可被认为是影响人工草地生产力的关键性特征.
Using 8 annual plant species, an outdoor pot experiment was conducted to investigate the effects of plant functional traits, including relative growth rate, special leaf area, leaf dry mass content, plant height, root depth and root mass per unit leaf area, on biomass production. The results show that 8 plant species significantly differed in their fimctional traits and productivity measured. General linear correlation analysis indicate that aboveground biomass （a surrogate index of community productivity） significantly correlated with relative growth rate, special leaf area, plant height and root depth, respectively, but not correlated with leaf dry mass content, and negatively correlated with root mass per unit leaf area. These results suggest that when plant species effects on ecosystem productivity are discussed in artificial grassland, it is better to take into account such key functional traits as relative growth rate, special leaf area, plant height and root depth.
出处
《兰州大学学报（自然科学版）》
CAS
CSCD
北大核心
2009年第4期37-41,共5页
Journal of Lanzhou University(Natural Sciences)
基金
国家自然科学基金项目(30770333)
