摘要
采用开顶式气室,研究了干旱胁迫下CO2浓度升高对大豆生长状况、光合作用及蒸腾作用的影响。结果表明,CO2浓度升高,大豆的光合速率提高5%,蒸腾速率降低6.8%,气孔导度降低11%,大豆的水分利用效率提高了1.03倍,增强了大豆的抗旱性。CO2浓度升高,可增强土壤微生物的活动,使大豆根瘤数增多。干旱胁迫则使大豆的光合速率、蒸腾速率、气孔导度降低,水分利用效率提高。
Soybean plants grown in open-top chambers were used to study the effects of elevated CO2 concentration on photosynthesis, transpiration and stoma conductance under drought stress. The result shows the elevated CO2 can enhance photosynthetic rate 5% and water use efficiency 1.03 times, whereas transpiration rate decreases 6.8% and stoma conductance decreases 11%, namely elevated CO2 can enhances the capacity of plants to drought resistance. The elevated CO2 concentration enhances the activity of edaphon and induces more root nodule of soybean. Water-stress decreases the photosynthesis, the transpiration, stoma conductance water use efficiency of soybean.
出处
《河南农业科学》
CSCD
北大核心
2005年第8期47-50,共4页
Journal of Henan Agricultural Sciences
基金
国家自然科学资金(30270945)
河南省自然科学基金项目(111012200)
关键词
大豆
CO2倍增
干旱胁迫
光合效应
Soybean
Elevated CO2
Drought-stress
Photosynthetic efficiency
