摘要
选择五叶地锦为研究对象,人为控制4种灌水量,测定五叶地锦幼苗的生长、生物量干重和生理生态特性等指标。结果表明:降水量低于350 mm时叶片数、叶面积、叶生物量、根生物量和总生物量显著降低,降水量低于250 mm时主枝长、光合速率、蒸腾速率、气孔导度和胞间CO2浓度受到明显的抑制。因此认为五叶地锦在极端干旱的地区不适宜作为固沙植物,只有在生长季节内降雨量250 mm以上的地区才能选择五叶地锦作为固沙植物。
Growth and physiological ecology of Parthenocissus quinquefolia seedlings to the simulated precipitation change was studied by observing its response of four artificially controlled water infuse levels. The results showed that leaf number, leaf area, leaf biomass, root biomass, and total biomass significantly lower at less than 350 mm water infuse, and plant height, photosynthetic rate, transpiration rate, stomatal conductance and intercellular CO2 concentration showed significant repression at less than 250 mm water infuse. Therefore Parthenocissus quinquefolia is not fit to sand binding in extremely dry regions, only when the amount of precipitation of the region is more than 250 mm can Parthenocissus quin- quefolia be chosen as a sand binding plant.
出处
《吉林农业大学学报》
CAS
CSCD
北大核心
2006年第5期521-524,共4页
Journal of Jilin Agricultural University
基金
省部共建国家重点实验室培育基地-吉林省生态恢复与生态系统管理重点实验室开放基金资助项目(DS2004-20)
关键词
模拟降水量
五叶地锦
生长
生物量
生理生态特性
simulated precipitation
Parthenocissus quinquefolia
growth
biomass
physiological ecology
