欢迎您！东篱公司
退出
-
申报数据库
-
立项数据库
-
成果数据库
-
项目获奖数据库
中文摘要：
采用控制环境生长室研究了2个密度水平下CO2浓度升高对红桦幼苗干物质分配与营养的影响，并分析了红桦干物质分配与养分浓度的关系。试验设2个CO2浓度水平（350和700μmol·mol^-1），每个CO2浓度水平下又设28和84株·m^-2两个密度水平。结果表明，升高CO2浓度可促进红桦幼苗生物量的增加，但对根冠比没有显著影响。促进效应的存在是由于短期内CO2浓度升高后植物大量吸收了土壤速效养分。CO2浓度的升高加速了土壤养分的消耗，但植物各器官N、P含量均下降，这是由生物量迅速增加产生的稀释效应造成的。
英文摘要：
The effects of elevated CO2 concentration on dry matter allocation and nutrient contents of red birch seedlings were studied under two planting densities in controlled environment chambers. The CO2 concentration were maintained at 350 and 700μmol·mol^-1 through the growing season with seedlings planted 28 and 84 plant·m^-2 in each CO2 concentration. The results showed that red birch biomass was stimulated by CO2 enrichment, while the root to shoot ratio was not affected. The instant consumption of soil nitrogen phosphorus available in large numbers resulted in the stimulative effects of enriched CO2 on plant biomass. Irrespective of the accelerated consumption of soil nutrients available, nitrogen and phosphorus contents of all plant organs decreased with CO2 concentration increasing, which mainly resulted from the diluting effects caused by enhancement of plant biomass.
同期刊论文项目
同项目期刊论文
Leaf photosynthesis of Betula albosinensis seedlings as affected by elevated CO2 and planting densit
Carbon stock and allocation of five restoration ecosystems in subalpine coniferous forest zone in We
Effects of elevated CO2 and temperature on growth and morphology of fir (Abies faxoniana) and native
位置：