Nitrogen application levels based on critical nitrogen absorption regulate processing tomatoes productivity, nitrogen uptake, nitrate distributions, and root growth in Xinjiang, China

作     者：JING Bo SHI Wenjuan DIAO Ming JING Bo;SHI Wenjuan;DIAO Ming

作者机构：Key Laboratory of Special Fruits and Vegetables Cultivation Physiology and Germplasm Resources Utilization of Xinjiang Production and Construction CorpsDepartment of HorticultureAgricultural CollegeShihezi UniversityShihezi 832003China State Key Laboratory of Eco-hydraulics in Northwest Arid Region of ChinaXi'an University of TechnologyXi'an 710048China 

出 版 物：《干旱区科学:英文版》 (Journal of Arid Land)

年 卷 期：2023年第15卷第10期

页      面：1231-1244页

核心收录：

学科分类：0830[工学-环境科学与工程（可授工学、理学、农学学位）] 09[农学] 0902[农学-园艺学] 090202[农学-蔬菜学] 

基　　金：supported by the National Natural Science Foundation of China (42077011) 

主　　题：critical N absorption nitrogen use efficiency(NUE) beta model total root dry weight(TRDW) root growth processing tomato 

摘      要：The unreasonable nitrogen(N)supply and low productivity are the main factors restricting the sustainable development of processing *** addition,the mechanism by which the N application strategy affects root growth and nitrate distributions in processing tomatoes remains *** this study,we applied four N application levels to a field(including 0(N0),200(N200),300(N300),and 400(N400)kg/hm^(2))based on the critical N absorption ratio at each growth stage(planting stage to flowering stage:22%;fruit setting stage:24%;red ripening stage:45%;and maturity stage:9%).The results indicated that N300 treatment significantly improved the aboveground dry matter(DM),yield,N uptake,and nitrogen use efficiency(NUE),while N400 treatment increased nitrate nitrogen(NO_(3)^(-)-N)residue in the 20–60 cm soil *** variations of total root dry weight(TRDW)and total root length(TRL)showed a single-peak ***,N300 treatment improved the secondary root parameter of TRDW,while N400 treatment improved the secondary root parameter of *** grey correlation coefficients indicated that root dry weight density(RDWD)in the surface soil(0–20 cm)had the strongest relationship with yield,whereas root length density(RLD)in the middle soil(20–40 cm)had a strong relationship with *** path model indicated that N uptake is a crucial factor affecting aboveground DM,TRDW,and *** above results indicate that N application levels based on critical N absorption improve the production of processing tomatoes by regulating N uptake and root ***,the results of this study provide a theoretical basis for precise N management.