干旱区科学2023，Vol.15Issue(10) ：1231-1244.DOI:10.1007/s40333-023-0108-2

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

JING Bo SHI Wenjuan DIAO Ming
干旱区科学2023，Vol.15Issue(10) ：1231-1244.DOI:10.1007/s40333-023-0108-2
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Nitrogen application levels based on critical nitrogen absorption regulate processing tomatoes productivity,nitrogen uptake,nitrate distributions,and root growth in Xinjiang,China

JING Bo 1SHI Wenjuan 2DIAO Ming3
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作者信息

  • 1. Key Laboratory of Special Fruits and Vegetables Cultivation Physiology and Germplasm Resources Utilization of Xinjiang Production and Construction Corps,Department of Horticulture,Agricultural College,Shihezi University,Shihezi 832003,China;State Key Laboratory of Eco-hydraulics in Northwest Arid Region of China,Xi'an University of Technology,Xi'an 710048,China
  • 2. State Key Laboratory of Eco-hydraulics in Northwest Arid Region of China,Xi'an University of Technology,Xi'an 710048,China
  • 3. Key Laboratory of Special Fruits and Vegetables Cultivation Physiology and Germplasm Resources Utilization of Xinjiang Production and Construction Corps,Department of Horticulture,Agricultural College,Shihezi University,Shihezi 832003,China
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Abstract

The unreasonable nitrogen(N)supply and low productivity are the main factors restricting the sustainable development of processing tomatoes.In addition,the mechanism by which the N application strategy affects root growth and nitrate distributions in processing tomatoes remains unclear.In this study,we applied four N application levels to a field(including 0(N0),200(N200),300(N300),and 400(N400)kg/hm2)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(NO3--N)residue in the 20-60 cm soil layer.Temporal variations of total root dry weight(TRDW)and total root length(TRL)showed a single-peak curve.Overall,N300 treatment improved the secondary root parameter of TRDW,while N400 treatment improved the secondary root parameter of TRL.The 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 yield.The path model indicated that N uptake is a crucial factor affecting aboveground DM,TRDW,and yield.The above results indicate that N application levels based on critical N absorption improve the production of processing tomatoes by regulating N uptake and root distribution.Furthermore,the results of this study provide a theoretical basis for precise N management.

Key words

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

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基金项目

National Natural Science Foundation of China(42077011)

出版年

2023
干旱区科学
中国科学院新疆生态与地理研究所,科学出版社

干旱区科学

CSTPCDCSCD北大核心
影响因子：1.743
ISSN：1674-6767
参考文献量1
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