中文摘要：

通过水培试验研究增氧对棉花生长的影响;试验设计3种增氧方式,分别为持续性增氧（Physical continuous oxygen,PCO）、间歇性增氧（Physical oxygen,PO）,化学增氧（Chemical oxygen,CO）,种棉花不增氧CK,不种棉花不增氧CK0;研究结果表明,不同增氧方式对营养液中溶解氧浓度都有不同程度的提高,表现为PCO〉PO〉CO〉CK;PCO处理对根体积、根系总吸收面积、根活性面积、根系生物量、株高、地上部生物量、氮和钾的吸收量的促进作用均达到显著水平,分别比CK增加了194.62%、261.89%、301.73%、57.15%、22.76%、38.03%、35.27%、84.78%;间歇性增氧PO处理对根系生物量、株高、地上部分生物量的促进作用显著,分别比CK高30.83%、15.65%、21.19%。通过以上结果表明,棉花对氧的需求敏感,不同增氧方式均能在一定程度上促进棉花生长,其中持续性增氧效果尤为突出,特别是对棉花生物量的积累,说明增氧可以提升棉花生长潜力。

英文摘要：

This study investigated the effect of aeration on growth of hydroponic cotton. Three kinds of aeration were tested： con tinuous aeration（PCO）; intermittent aeration（PO）; and chemical oxygen（CO）. In addition, non-aeration with cotton planted（CK）,and non-aeration without cotton planted（CK0） were also tested. The different oxygenation measures promoted dissolved oxygen in the nutrient solution at different degrees with PCOPOCOCK. The effects of PCO treatment on root volume, root total absorption area, root activity area, root dry weight, plant height, amount of above-ground biomass, and promotion of nitrogen and potassium uptake increased by 194.62%, 261.89%, 301.73%, 57.15%, 22.76%, 38.03%, 35.27%, and 84.78% compared with CK, respectively; the effects of PO treatment on root dry weight, plant height, and amount of above-ground dry weight resulted in significant increases of 30.83%, 15.65%, and 21.19% compared with CK, respectively. These results indicate cotton is sensitive to oxygen, and different aeration measures could promote the growth of cotton to a certain degree. The effect of continuous aeration is particularly prominent, with cotton dry weight being especially significant. Aeration could conclusively enhance the potential of cotton growth.