Effects of urea-N and CO_(2) coupling fertilization on the growth,photosynthesis,yield and anthocyanin content of hydroponic purple cabbage Brassica campestris ssp.chinensis  

作　　者：Danyan Chen Yuanyuan Feng Ya Liu Juan Hu Shilong Li Jingze Ma Xinyu Lu Xiaorui Jiang Shuhui Sun Zhi Yang Changyi Wang 

机构地区：[1]College of Horticulture,Jinling Institute of Technology,Nanjing 210038,China [2]Co-Innovation Center for Sustainable Forestry in Southern China,College of Forestry,Nanjing Forestry University,Nanjing 210037,China [3]School of Software Engineering,Jinling Institute of Technology,Nanjing 211169,China [4]Powerchina Zhongnan Engineering Co.,Ltd,Changsha 410014,China [5]College of Agricultural Science and Engineering,Hohai University,Nanjing 210098,China [6]China Coal Technology Engineering Group Nanjing Design and Research Institute Co.Ltd,Nanjing 210014,China

出　　处：《International Journal of Agricultural and Biological Engineering》2023年第5期123-131,共9页国际农业与生物工程学报（英文）

基　　金：supported by the Basic Research Program of Jiangsu Province(Grant No.BK20230112);the Key Research and Development Project of Jiangsu Province(Grant No.BE2019378);Open Project of Key Laboratory of Facility Agricultural Engineering in the Middle and Lower Reaches of the Yangtze River,Ministry of Agriculture and Rural Affairs(Grant No.zdsys-2019-05);the Foundation of Jiangsu College Students Provincial Key Innovation Training Program,National College Students’Innovation and Entrepreneurship Training Program(Grant No.202113573015Z,202213573031Z);High-level Scientific Research Foundation for the Introduction of Talent of Jinling Institute of Technology(Grant No.jit-b-201914).

摘　　要：Water and fertilizer coupling is a high-efficiency technology for the development of facility agriculture.However,the interaction effect of nitrogen(N)and air carbon dioxide(CO_(2))on hydroponic purple cabbage,especially on its leaf anthocyanins under hydroponic solution systems,remains unexplored.In this study,six treatments were set as C0N0,C0N2,C0N4,C1N0,C1N2 and C1N4,with N0,N2 and N4 being 0.0 g/L,0.2 g/L and 0.4 g/L exogenous urea-N to hydroponic solution dilution,respectively.C0 and C1 were set as with and without CO_(2)fertilizer(i.e.,800 g CO_(2)agent added one week after transplanting and 600 g CO_(2)agent added when the plant reached 15 cm in height),respectively.Pot experiments were conducted to investigate the interaction effect of N and air CO_(2)(N×CO_(2))on the growth,photosynthesis,yield and anthocyanin content of hydroponic purple cabbage Brassica campestris ssp.chinensis.The results showed N×CO_(2)extremely significantly influenced plant height(H),net photosynthetic rate(Pn),stomatal conductance(Gs),intercellular oxidation concentration(Ci),transpiration rate(Tr),leaf water use efficiency(LWUE)and yield.The C1N0 treatment had the largest yield at 262.5 g/plant,with higher values for root length,root weight,plant height and leaf number than the other treatments.The Pn,Ci and Tr of C1N4 were the highest at 3.05μmol CO_(2)/m2·s,352.8μmol CO_(2)/m2·s and 2.31 mmol H2O/m2·s,respectively.The C1N2 treatment received the largest Gs value of 0.70 mol H2O/m2·s and the largest Tr of 2.31 mmol H2O/m2·s.There was the highest LWUE for C0N2(1.41)and the highest anthocyanin content for C1N2(1.35 mg/kg).There was a significant negative correlation between leaf number and anthocyanin(r=-0.414,p<0.05).The findings demonstrated that adding CO_(2)fertilizer and 0.2 g/L exogenous urea-N to hydroponic solution dilution is a potential N×CO_(2)coupling strategy to increase anthocyanin and the yield of purple cabbage.

关 键 词：nitrogen concentration carbon dioxide purple cabbage hydroponic solution anthocyanins 

分 类 号：S635[农业科学—蔬菜学]