摘要
目的研究低压环境中蔬菜作物的生长发育特性,为受控生态生保系统提供高等植物栽培技术。方法通过设置对照,采用对比方法研究不同压力对油麦菜生长和生理特性的影响。结果与常压(101.0 kPa)相比,总压40.0 kPa和氧分压8.4 kPa下油麦菜种子发芽率减少7.62%;生长基本正常,但生育期延迟,同期收获时生物量降低13.67%,总糖含量有所降低;前期平均光合速率和蒸腾速率低于常压条件,但后期光合速率和蒸腾速率有所增加;乙烯释放量减少38.79%,株高降低11.68%,叶面积、根系所占比例及根系活力分别增加15.43%、2.57%和40.53%。结论总压40.0 kPa和氧分压8.4 kPa对油麦菜种子发芽和生长有一定影响,应采取相应措施来调节其生长发育。
Objective To investigate the characteristic of growth and development of vegetable at hypobaric environment and offer the cultivating technique of controlled ecological life support system for higher plant.Methods The means of comparative measurement was adopted to study the growth and physiological characteristic of lettuce under low and normal pressure（40.0 kPa,101.0 kPa）,which was carried out with the low pressure plant-cultivating facility.Results Compared with normal pressure,germination rate of lettuce seed was eliminated by 7.62% under total pressure 40.0 kPa and oxygen partial pressure 8.4 kPa conditions;harvest time of lettuce was delayed,so biomass harvested at the same time reduced by 13.67% and content of total saccharide declined;the average rates of photosynthesis and transpiration were lower than those at normal pressure in 30 days after planting（DAP）,but which reversed after that;release of C2H4 and shoot height reduced by 38.79% and 11.68%,but leaf area,ratio of root to total biomass and root vigor increased by 15.43%,2.57% and 40.53%,respectively.Conclusion Seed germination,growth and development of lettuce are affected in some degree at total pressure 40.0 kPa and oxygen partial pressure 8.4 kPa,some measures should be adopted to regulate the growth of lettuce.
出处
《航天医学与医学工程》
CAS
CSCD
北大核心
2010年第1期47-51,共5页
Space Medicine & Medical Engineering
基金
"863"基金资助项目(2004AA735111)
关键词
低压环境
油麦菜
受控生态生保系统
hypobaric environment
lettuce
controlled ecological life support system
