营养液臭氧消毒频次对水培苗用大白菜(快菜)生长及微生物环境的影响

Effect of Nutrient Solution Ozone Disinfection Frequency on Growth and Microbial Environment of Hydroponic Fast-growing Cabbage

为了抑制夏季高温造成的水培快菜细菌性病害的发生,以京研快菜4号为试材,采用在循环营养液中通入臭氧曝气的方式,研究不同频次臭氧消毒对快菜细菌性病害的抑制作用以及对产量和品质的影响。结果表明:随着通入臭氧频次的增加,营养液中细菌含量显著降低,快菜软腐病发病率也逐渐降低;不同频次臭氧处理均明显降低了营养液中的微生物种类。向营养液中通入臭氧对快菜植株生长和品质改善有促进作用,其中T2(每3 d通1次,每次10 min)处理的综合效果最优,快菜地上部鲜质量和干质量、可溶性糖含量、可溶性蛋白含量均显著高于对照。

In order to restrain the occurrence of bacterial diseases of hydroponic fast-growing cabbage caused by high temperature during summer,this experiment took‘Jingyankuaicai No.4’as test material,adopted the method of introducing ozone aeration into the circulating nutrient solution and studied the suppression condition of bacterial diseases of fast-growing cabbage by different frequencies of ozone disinfection and effects on yield and quality.The results showed that along with the increase of ozone introducing frequency,the bacteria contents in nutrient solution significantly decreased.And incidence of soft rot disease in fast-growing cabbage also decreased gradually.Different frequencies of ozone treatments could all reduce significantly the microbial species in nutrient solution.Introducing ozone into nutrient solution had promote of growth and quality on fast-growing cabbage plants.Among them,T2(pass once every 3 days,10 min each time)had the best comprehensive effects.The fresh and dry weights of above-ground part,soluble sugar content,and soluble protein content of fast-growing cabbage plants were all significantly higher than that of the contrast.