15N fate in maize cropping system in response to black soil fertility improvement in China. (25th September 2021)
- Record Type:
- Journal Article
- Title:
- 15N fate in maize cropping system in response to black soil fertility improvement in China. (25th September 2021)
- Main Title:
- 15N fate in maize cropping system in response to black soil fertility improvement in China
- Authors:
- Fu, HaiMei
Duan, YingHua
Zhu, Ping
Gao, HongJun
Xu, MingGang - Abstract:
- Abstract: Applications of high amounts of nitrogen (N) fertilizer are essential for obtaining sustainable maize ( Zea mays L.) yields but also result in low N‐use efficiency (NUE) and cause a series of environmental problems. To optimize fertilizer management, it is necessary to determine the effects of soil fertility improvement on NUE and the fate of N fertilizer. In this study, we conducted a 15 N tracer pot experiment involving five different fertilizer treatments in soils with five different total organic carbon levels under field conditions. The average NUE ranged from 36 to 56% 15 N‐urea and 0.1 to 0.2% residual N in the first and second seasons. The N retained in the soil ranged from 10 to 28%, and the N lost to water and the atmosphere ranged from 29 to 39% in the five soils. Compared with that in the low‐fertility soils, NUE in the high‐fertility soils was 20–45% greater, and N loss was 1 –6% lower. The results showed that higher soil fertility corresponded to higher NUE and lower N loss. We suggest that although the local customary N fertilizer application rate (N3; 165 kg N/ha) in the study area is reasonable for low‐fertility soils, after soil fertility improvements, an approximately 50% reduction of N fertilizer should be implemented. Core Ideas: Five different fertility black soils were collected to analyze the fate of N fertilizer. The N‐use efficiency of maize increased by 20–45% with the improvement of black soil fertility. The N loss decreased by 1–6%Abstract: Applications of high amounts of nitrogen (N) fertilizer are essential for obtaining sustainable maize ( Zea mays L.) yields but also result in low N‐use efficiency (NUE) and cause a series of environmental problems. To optimize fertilizer management, it is necessary to determine the effects of soil fertility improvement on NUE and the fate of N fertilizer. In this study, we conducted a 15 N tracer pot experiment involving five different fertilizer treatments in soils with five different total organic carbon levels under field conditions. The average NUE ranged from 36 to 56% 15 N‐urea and 0.1 to 0.2% residual N in the first and second seasons. The N retained in the soil ranged from 10 to 28%, and the N lost to water and the atmosphere ranged from 29 to 39% in the five soils. Compared with that in the low‐fertility soils, NUE in the high‐fertility soils was 20–45% greater, and N loss was 1 –6% lower. The results showed that higher soil fertility corresponded to higher NUE and lower N loss. We suggest that although the local customary N fertilizer application rate (N3; 165 kg N/ha) in the study area is reasonable for low‐fertility soils, after soil fertility improvements, an approximately 50% reduction of N fertilizer should be implemented. Core Ideas: Five different fertility black soils were collected to analyze the fate of N fertilizer. The N‐use efficiency of maize increased by 20–45% with the improvement of black soil fertility. The N loss decreased by 1–6% after the soil fertility improved in maize cropping system. Fifty percent reduction of N fertilizer should be implemented in high fertility soils in northeast China. … (more)
- Is Part Of:
- Agronomy Journal. Volume 113:Number 5(2021)
- Journal:
- Agronomy Journal
- Issue:
- Volume 113:Number 5(2021)
- Issue Display:
- Volume 113, Issue 5 (2021)
- Year:
- 2021
- Volume:
- 113
- Issue:
- 5
- Issue Sort Value:
- 2021-0113-0005-0000
- Page Start:
- 4323
- Page End:
- 4333
- Publication Date:
- 2021-09-25
- Subjects:
- Agronomy -- Periodicals
630 - Journal URLs:
- http://onlinelibrary.wiley.com/ ↗
- DOI:
- 10.1002/agj2.20794 ↗
- Languages:
- English
- ISSNs:
- 0002-1962
- Deposit Type:
- Legaldeposit
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- Available online (eLD content is only available in our Reading Rooms) ↗
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- British Library DSC - BLDSS-3PM
British Library HMNTS - ELD Digital store - Ingest File:
- 19647.xml