Effects of water and nitrogen coupling on the plant growth and quality of greenhouse tomatoes at the first flowering and fruiting stages  

作　　者：Danyan Chen Hailing Li Xinyi Wang Jingze Ma Shilong Li Xiaorui Jiang Aijun Dai Hao Yu Yingying Zhang Ya Liu 

机构地区：[1]College of Horticulture,Jinling Institute of Technology,Nanjing 210038,China [2]College of Forestry,Nanjing Forestry University,Nanjing 210037,China [3]College of Horticulture and Landscape Architecture,Yangzhou University,Yangzhou 225009,Jiangsu,China [4]College of Resources and Environment,Fujian Agriculture and Forestry University,Fuzhou 350002,China [5]School of Software Engineering,Jinling Institute of Technology,Nanjing 211169,China

出　　处：《International Journal of Agricultural and Biological Engineering》2025年第1期181-190,共10页国际农业与生物工程学报(英文)

基　　金：funded by the Basic Research Program of Jiangsu(Grant No.BK20230112);supported by the Key Research and Development Project of Jiangsu Province(Grant No.BE2019378);the High-level Scientific Research Foundation for the Introduction of Talent of Jinling Institute of Technology(Grant No.jit-b-201914,jit-b-202005).

摘　　要：Good growth of tomato at the early growing stages is the key to final yield formation,for which water(W)and nitrogen(N)applications are two necessary factors.In this study,two irrigating systems(W1,W2)and three N applications(N1,N2,N3)were interacted(W×N)to plant the cherry tomato variety‘‘Jinling Meiyu’’in greenhouse.W1(reduced irrigation)and W2(normal irrigation)had a 7:9 irrigated ratio based on former research.N1,N2,and N3 were set at 100%,80%,and 60%normal N application,respectively.The tomato plant height(PH),stem circumference(SC),number of leaves(NL),number of first order fruits(NF),the single fruit weight(SFW),contents of fruit Vitamin C(VC)and soluble sugar(SS),fresh weights of root(RW),leaf(LW),and plant stem(PSW),as well as leaf chlorophyll fluorescence value(SPAD),temperature(T),humidity(RH),and nitrogen content(N)were investigated at the first flowering and fruiting stage.The results showed that W×N had significant impacts on early plant growth and fruit quality of tomato.W2N2 obviously received the largest values of tomato PH(152.5 cm),SC(4.1 cm),NF(11 fruits/plant),and LW(45.0 g/plant),but obtained the lowest VC(9.71 mg/kg)and SS(2.40%).However,W1N3 had the largest values of leaf RH(56.9%),N contents(14.23 mg/g),and VC(16.29 mg/kg),with NF also at 11.0 fruits/plant.W2N1 significantly had the highest RW(14.4 g/plant),PSW(71.8 g/plant),and SFW(21.3 g/fruit).W2N3,W1N1,and W1N2 obtained the most NL(103.7 pieces/plant),SS(4.06%),and leaf SPAD(36.85),respectively.Pearson correlation analysis results showed PH negatively significantly correlated with NF(p<0.05).The leaf SPAD positively significantly correlated with PH(p<0.05)and RH(p<0.01),but negatively significantly correlated with SC(p<0.05)and T(p<0.01).Moreover,leaf N content also had a positive significant correlation with PH(p<0.05),and an extremely positive significant correlation with RH and SPAD(p<0.01).However,it negatively significantly correlated with SC(p<0.01)and T(p<0.05).Significantly,VC had positive correlations with PSW,leaf

关 键 词：greenhouse tomato water and nitrogen interaction leaf growth SPAD value NITROGEN 

分 类 号：S64[农业科学—蔬菜学]