论文部分内容阅读
目的研究植物在高大气CO2浓度下的生长特性,为空间受控生态生保系统选择生物部件提供依据。方法在受控环境中不同CO2浓度下培养油麦菜,综合评价不同处理下植株的生长状态、生理特性和养分含量。结果0.1%～1.0%CO2浓度能够促进油麦菜植株的光合和蒸腾速率、提高叶绿素和类胡萝卜素的含量,但更高浓度(1.5%～2.0%)CO2则会导致其下降;在0.1%～2.0%CO2浓度条件下,油麦菜植株能够基本正常生长,株高和叶面积都有所增加,但叶片数量却在下降;随着CO2浓度梯度增加,油麦菜植株中氮、钾和Vc的含量下降,磷的含量上升,而微量元素的含量没有明显差异。结论油麦菜植株在高CO2浓度下能够基本正常生长,没有受到严重抑制现象,具有较强耐高CO2浓度的能力,适宜作为受控生态生保系统中的候选生物部件。
Aim To study the growth characteristics of plants under high atmospheric CO2 concentration, and to provide a basis for selecting biological components for space-controlled eco-system. Methods The oleifera was cultivated under different CO2 concentrations in a controlled environment to evaluate the growth status, physiological characteristics and nutrient contents of the plants under different treatments. Results CO2 concentration of 0.1% -1.0% could promote the photosynthesis and transpiration rate and increase the contents of chlorophyll and carotenoids, but higher concentrations of CO2 (1.5-2.0% Under the condition of 2.0% CO2 concentration, the plants grown in lettuce could grow normally and the plant height and leaf area increased but the number of leaves decreased. With the increase of CO2 concentration, the contents of nitrogen, potassium and Vc Decline, phosphorus content increased, while the content of trace elements no significant difference. Conclusion The plantlets of lettuce can grow normally under high CO2 concentration without any serious inhibition and have the ability of high CO2 tolerance. Therefore, it is suitable as a candidate biological component in the controlled eco-system.