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Long‐term nitrogen addition impact on agronomic traits, nitrogen uptake and nitrogen resorption efficiency of wheat in a rainfed region
Author(s) -
Xu Aixia,
Li Lingling,
Coulter Jeffrey A.,
Xie Junhong,
Zhang Renzhi,
Luo Zhuzhu,
Cai Liqun,
Liu Chang,
Wang Linlin
Publication year - 2021
Publication title -
soil science society of america journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.836
H-Index - 168
eISSN - 1435-0661
pISSN - 0361-5995
DOI - 10.1002/saj2.20172
Subject(s) - agronomy , nitrogen , loess plateau , yield (engineering) , fertilizer , resorption , grain yield , chemistry , environmental science , biology , soil science , materials science , metallurgy , endocrinology , organic chemistry
Abstract Nitrogen (N) fertilizer management is one of the most important issues in wheat ( Triticum aestivum L.) production. To explore the mechanism of N uptake efficiency (NupE) and N resorption efficiency (NRE) in wheat, this study examined the effects of different N fertilizer application rates (0, 52.5, 105, 157.5, 157.5, and 210 kg N ha −1 yr −1 ) on crop growth parameters, NupE, NRE, and N use efficiency (NUE). The results of the 2‐yr (2018 and 2019) study showed that the growth of crops was enhanced in high‐N treatments, resulting in higher N concentration in wheat tissues. The 105 kg N ha −1 treatment (N105) was the best rate for improving spring wheat yield and NUE, ensuring the highest values of N uptake, evapotranspiration, and leaf NRE. Compared with the non‐N‐fertilized control, N105 increased grain yield and N uptake by 46.90 and 90.54%, respectively; thus, N105 had 16.40% higher NUE, 28.33% higher N utilization efficiency (NutE), and 0.58 kg kg −1 greater NupE. Therefore, N uptake and N resorption are of great importance for increasing NUE of wheat, and for improving the sustainability of wheat production in the semi‐arid Loess Plateau of China.