Partial substitution of manure reduces nitrous oxide emission with maintained yield in a winter wheat crop.
In: Journal of Environmental Management, Jg. 326 (2023-01-18), S. N.PAG
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Zugriff:
Conventional fertilization of agricultural soils results in increased N 2 O emissions. As an alternative, the partial substitution of organic fertilizer may help to regulate N 2 O emissions. However, studies assessing the effects of partial substitution of organic fertilizer on both N 2 O emissions and yield stability are currently limited. We conducted a field experiment from 2017 to 2021 with six fertilizer regimes to examine the effects of partial substitution of manure on N 2 O emissions and yield stability. The tested fertilizer regimes, were CK (no fertilizer), CF (chemical fertilizer alone, N 300 kg ha−1, P 2 O 5 150 kg ha−1, K 2 O 90 kg ha−1), CF + M (chemical fertilizer + organic manure), CFR (chemical fertilizer reduction, N 225 kg ha−1, P 2 O 5 135 kg ha−1, K 2 O 75 kg ha−1), CFR + M (chemical fertilizer reduction + organic manure), and organic manure alone (M). Our results indicate that soil N 2 O emissions are primarily regulated by soil mineral N content in arid and semi-arid regions. Compared with CF, N 2 O emissions in the CF + M, CFR, CFR + M, and M treatments decreased by 16.8%, 23.9%, 42.0%, and 39.4%, respectively. The highest winter wheat yields were observed in CF, followed by CF + M, CFR, and CFR + M. However, the CFR + M treatment exhibited lower N 2 O emissions while maintaining high yield, compared with CF. Four consecutive years of yield data from 2017 to 2021 illustrated that a single application of organic fertilizer resulted in poor yield stability and that partial substitution of organic fertilizer resulted in the greatest yield stability. Overall, partial substitution of manure reduced N 2 O emissions while maintaining yield stability compared with the synthetic fertilizer treatment during the wheat growing season. Therefore, partial substitution of manure can be recommended as an optimal N fertilization regime for alleviating N 2 O emissions and contributing to food security in arid and semi-arid regions. [Display omitted] • Soil N 2 O emissions were mainly regulated by soil mineral N content in arid and semi-arid regions. • Chemical fertilizer results in higher N 2 O emissions than does the application of organic fertilizer containing the same amount of N. • Partial substitution of organic fertilizer allowed for mitigating N 2 O emissions while simultaneously maintaining crop outputs. • Partial substitution of organic fertilizer has the greatest yield stability. [ABSTRACT FROM AUTHOR]
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Partial substitution of manure reduces nitrous oxide emission with maintained yield in a winter wheat crop.
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Autor/in / Beteiligte Person: | Gao, Huizhou ; Xi, Yajing ; Wu, Xueping ; Pei, Xuexia ; Liang, Guopeng ; Bai, Ju ; Song, Xiaojun ; Zhang, Meiling ; Liu, Xiaotong ; Han, Zixuan ; Zhao, Gang ; Li, Shengping |
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Zeitschrift: | Journal of Environmental Management, Jg. 326 (2023-01-18), S. N.PAG |
Veröffentlichung: | 2023 |
Medientyp: | academicJournal |
ISSN: | 0301-4797 (print) |
DOI: | 10.1016/j.jenvman.2022.116794 |
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