Balancing potato yield, soil nutrient supply, and nitrous oxide emissions : An analysis of nitrogen application trade-offs
Copyright © 2023 Elsevier B.V. All rights reserved..
Potato has been promoted as a national key staple food to alleviate pressure on food security in China. Appropriate nitrogen (N) application rate is prerequisite and is crucial for increasing yield, improving fertilizer efficiency, and reducing N losses. In the present study, we determined the optimum N application rates by analyzing field trial data from the main potato producing areas of China between 2004 and 2020. We considered the equilibrium relationships between potato yield, N uptake, partial N balance (PNB), and N2O emission under different soil indigenous N supply (INS) scenarios. The results showed that N rate, INS, and their interactions all significantly affect potato yield and nutrient uptake increment. On average, N application increased potato yield and N uptake by 29.5 % and 56.7 %, respectively. The relationship between N rate and yield increment was linear-plateau, while the relationship between N rate and N uptake increment was linear-linear. Soil INS accounted for 63.5 % of total potato N requirement. Potato yield increment and nutrient uptake increment were exponentially negatively correlated with INS and had a significant parabolic-nonlinear relationship with the interaction of N fertilizer application rate and INS. PNB was negatively correlated with fertilizer N supply intensity as a power function. Based on our analysis, a N application rate of 166 kg N ha-1 was found to be sufficient when the target yield was <34 t ha-1. However, when the target yield reached 40, 50 and 60 t ha-1, the recommended N application rate increased to 182, 211, and 254 kg N ha-1, respectively, while ensuring N2O emissions low with an emission factor of 0.2 %. Our findings will help guide potato farming toward cleaner production without compromising environmental benefit.
| Medienart: |
E-Artikel |
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| Erscheinungsjahr: |
2023 |
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| Erschienen: |
2023 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:899 |
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| Enthalten in: |
The Science of the total environment - 899(2023) vom: 15. Nov., Seite 165628 |
| Sprache: |
Englisch |
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| Beteiligte Personen: |
Ning, Linyirui [VerfasserIn] |
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| Links: |
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| Themen: |
Fertilizers |
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| Anmerkungen: |
Date Completed 20.09.2023 Date Revised 20.09.2023 published: Print-Electronic Citation Status MEDLINE |
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| doi: |
10.1016/j.scitotenv.2023.165628 |
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| funding: |
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| Förderinstitution / Projekttitel: |
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NLM359684262 |
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| 245 | 1 | 0 | |a Balancing potato yield, soil nutrient supply, and nitrous oxide emissions |b An analysis of nitrogen application trade-offs |
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| 520 | |a Copyright © 2023 Elsevier B.V. All rights reserved. | ||
| 520 | |a Potato has been promoted as a national key staple food to alleviate pressure on food security in China. Appropriate nitrogen (N) application rate is prerequisite and is crucial for increasing yield, improving fertilizer efficiency, and reducing N losses. In the present study, we determined the optimum N application rates by analyzing field trial data from the main potato producing areas of China between 2004 and 2020. We considered the equilibrium relationships between potato yield, N uptake, partial N balance (PNB), and N2O emission under different soil indigenous N supply (INS) scenarios. The results showed that N rate, INS, and their interactions all significantly affect potato yield and nutrient uptake increment. On average, N application increased potato yield and N uptake by 29.5 % and 56.7 %, respectively. The relationship between N rate and yield increment was linear-plateau, while the relationship between N rate and N uptake increment was linear-linear. Soil INS accounted for 63.5 % of total potato N requirement. Potato yield increment and nutrient uptake increment were exponentially negatively correlated with INS and had a significant parabolic-nonlinear relationship with the interaction of N fertilizer application rate and INS. PNB was negatively correlated with fertilizer N supply intensity as a power function. Based on our analysis, a N application rate of 166 kg N ha-1 was found to be sufficient when the target yield was <34 t ha-1. However, when the target yield reached 40, 50 and 60 t ha-1, the recommended N application rate increased to 182, 211, and 254 kg N ha-1, respectively, while ensuring N2O emissions low with an emission factor of 0.2 %. Our findings will help guide potato farming toward cleaner production without compromising environmental benefit | ||
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| 650 | 4 | |a N(2)O emission | |
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| 700 | 1 | |a Xu, Xinpeng |e verfasserin |4 aut | |
| 700 | 1 | |a Qiu, Shaojun |e verfasserin |4 aut | |
| 700 | 1 | |a Lei, Qiuliang |e verfasserin |4 aut | |
| 700 | 1 | |a Zhang, Yitao |e verfasserin |4 aut | |
| 700 | 1 | |a Luo, Jiafa |e verfasserin |4 aut | |
| 700 | 1 | |a Ding, Wencheng |e verfasserin |4 aut | |
| 700 | 1 | |a Zhao, Shicheng |e verfasserin |4 aut | |
| 700 | 1 | |a He, Ping |e verfasserin |4 aut | |
| 700 | 1 | |a Zhou, Wei |e verfasserin |4 aut | |
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