华北农学报2017，Vol.32Issue(4)：208-214,7.DOI:10.7668/hbnxb.2017.04.033
根际氧浓度对番茄幼苗生长发育的影响
Effects of Oxygen Concentration in Rhizosphere on the Growth of Tomato Seedlings
摘要
Abstract
To investigate the influence of oxygen concentrations in the root system on tomato development in hydroponics cultivation,two tomato cultivars,which called Henan 4 and Fenzhenzhu,were grown in nutrient solution under four dissolve oxygen (DO) concentrations,which were hypoxia (0.5-2.0 mg/L;Nitrogen treatment),normoxia (7.0-8.0 mg/L;Air treatment),supersaturate oxygen (14.0-17.0 mg/L;Oxygen treatment) and no aeration as control (6.4-1.2 mg/L).Plant biomass,root vitality,photosynthetic pigment contents and growth indexes were investigated at seedling stage.The result showed that with the increase of oxygen concentration, the growth of seedlings was better, and the root vitality of seedlings increased, but photosynthetic pigment contents reduced.Compared with CK, normoxia and saturated oxygen treatment significantly increased the longest root length and the dry and fresh quality of tomato seedlings at the end of treatment.On the 18th day, for the Henan 4 which compared with CK, the total dry weight increased 24.00% and 74.86% under normoxia and saturated oxygen treatment, respectively.And the longest root length increased 67.23% and 230.55%, respectively.However, the total dry weight reduced 3.43%, and the longest root length reduced 1.63% under hpoxia treatment.The roots and shoots were more flourishing and biomass were the highest under saturated oxygen, thus improving the oxygen concentration in rhizosphere could be beneficial to the growth and yield of tomato.关键词
番茄幼苗/根际氧浓度/形态生长/氧饱和/低氧/根构型Key words
Tomato seedlings/Rhizosphere oxygen concentration/Form growth/Oxgen Saturation/Hypoxia/Rootarchitecture分类
农业科技引用本文复制引用
郑小兰,侯亚兵,王瑞娇,赵群法,王媛媛,孙治强..根际氧浓度对番茄幼苗生长发育的影响[J].华北农学报,2017,32(4):208-214,7.基金项目
国家大宗蔬菜产业技术体系(CARS-25-C-06) （CARS-25-C-06）
