低压高氧环境中4种莴苣的生长特性研究  

Study on Growth Characteristics of Four Lettuce Varieties Under Hypobaria and Hyperoxia

作　　者：唐永康[1] 高峰[1] 冯红旗[1] 纪运杰 Tang Yongkang;Gao Feng;Feng Hongqi;Ji Yunjie(National Key Laboratory of Human Factors Engineering,China Astronaut Research and Training Center,Beijing 100094,China)

机构地区：[1]中国航天员科研训练中心人因工程重点实验室

出　　处：《航天医学与医学工程》2019年第5期412-419,共8页Space Medicine & Medical Engineering

基　　金：中国航天医学工程预先研究项目(2012SY54A0304)

摘　　要：目的探索低压和高氧对不同品种莴苣生长特性的影响。方法预培养4种莴苣植株15d,在3种总压(101、54和30kPa)和2种氧分压(21和28kPa)下生长30d。观察植株生长、光合色素、营养组分变化。结果常压(101kPa)和高氧(28kPa)对4种莴苣生长抑制较小,但低压(54kPa和30kPa)和高氧则严重抑制了4种莴苣生长,生物量、叶面积、光合色素和营养组分均显著下降,其中54kPa和30kPa下,4种莴苣植株均出现不同程度死亡;常氧(21kPa)和不同总压(101、54和30kPa)对4种莴苣生长的影响不显著。结论低压(54或30kPa)和高氧(28kPa)抑制4种莴苣生长。莴苣品种③和①生物量累积显著高于品种②和④。Objective To investigate the effects of hyperoxia and hyperoxia on the the growth and nutrition of lettuce.Methods Fifteen day old lettuce plants(Lactuca sativa L.four varieties)seedlings were transplanted and grown for 30 days under three levels of total atmospheric pressure(101,54 and30 kPa)and two levels of oxygen partial pressure(21 and 28 kPa).Results The growth of all lettuce plants in normal total pressure was not inhibited by Hyperioxia(28 kPa).But hyperoxia significantly inhibited the growth of lettuce plants by decreasing biomass,leaf area and the contents of chlorophyll,carotenoid,minerals,ash and crude fat in hypobaria(54 kPa or 30 kPa).Under hypobaria conditions,hyperoxia caused the death of four lettuce plants.Total pressures(101,54 and 30 kPa)had no significant influence on the growth of all lettuce plants under the same normal oxygen partial pressure(21 kPa).Conclusion Hyperoxia(28 kPa)markedly inhibits the growth of four lettuce plants in hypobaria(54 kPa or 30 kPa).Varieties ① and ③ have a a higher biamasses than varieties ②and ④.

关 键 词：低压 高氧 莴苣 生长特性 

分 类 号：R852.8[医药卫生—航空、航天与航海医学] S636.2[医药卫生—临床医学]