Fate of 15N-labelled urea as affected by long-term manure substitution

文献类型: 外文期刊

第一作者: Dai, Fuyue

作者: Dai, Fuyue;Fan, Bingqian;Li, Jungai;Wang, Hongyuan;Wang, Zhen;Zhai, Limei;Di, Hong J.;Liu, Hongbin;Zhang, Yitao;Bashir, Muhammad Amjad;Ezzati, Golnaz;Wang, Hongyuan

作者机构: Chinese Acad Agr Sci, Inst Agr Resources & Reg Planning, Changping Soil Quality Natl Observat & Res Stn, State Key Lab Efficient Utilizat Arid & Semiarid A, Beijing 100081, Peoples R China;Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China;Engro Fertilizers Ltd, Dept Agron, Lahore, Pakistan;Teagasc, Johnstown Castle, Environm Res Ctr, Wexford, Ireland;12 Zhongguancun South St, Beijing 100081, Peoples R China

关键词: Editor; Pavlos Kassomenos; Manure substitution; Fate of 15 N -labelled urea; N use eff iciency; Reactive N losses

期刊名称:SCIENCE OF THE TOTAL ENVIRONMENT ( 2022影响因子:9.8; 五年影响因子:9.6 )

ISSN: 0048-9697

年卷期: 2023 年 893 卷

页码:

收录情况: SCI

摘要: Quantifying the fate of fertilizer nitrogen (N) is essential to develop more sustainable agricultural fertilization practices. However, the fate of chemical fertilizer N, particularly in long-term manure substitution treatment regimes, is not fully understood. The present study aimed to investigate the fate of 15N-labelled urea in a chemical fertilizer treatment (CF, 240 kg 15N ha-1) and N manure 50 % substitution treatment (1/2N + M, 120 kg 15N ha-1 + 120 kg manure N ha-1) in two continuous crop seasons, based on a 10-year long-term experiment in the North China Plain (NCP). The results showed that manure substitution greatly enhanced 15N use efficiency (15NUE) (39.9 % vs. 31.3 %) and suppressed 15N loss (6.9 % vs. 7.5 %) compared with the CF treatment in the first crop. However, the N2O emissions factor in the 1/ 2N + M treatment was increased by 0.1 % (0.5 kg 15N ha-1 for CF vs. 0.4 kg 15N ha-1 for 1/2N + M) compared with the CF treatment, although N leaching and NH3 volatilization rates decreased by 0.2 % (10.8 kg 15N ha-1 for CF vs. 5.1 kg 15N ha-1 for 1/2N + M) and 0.5 % (6.6 kg 15N ha-1 for CF vs. 2.8 kg 15N ha-1 for 1/2N + M), respectively. In which, only NH3 volatilization presented significantly difference between treatments. It is important to note that in the second crop, the residual 15N in soil (0-20 cm) remained mostly in the soil for the CF (79.1 %) and the 1/2N + M treatment (85.3 %), and contributed less to crop N uptake (3.3 % vs. 0.8 %) and leached losses (2.2 % vs. 0.6 %). This proved that manure substitution could enhance the stabilization of chemical N. These results suggested that long-term manure substitution effectively increases NUE, suppresses N loss, and improves N stabilization in soil, but negative impacts such as N2O emissions due to climate change should be investigated further.

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