Improving maize carbon and nitrogen metabolic pathways and yield with nitrogen application rate and nitrogen forms
© 2024 Meng et al..
Reduced fertilizer efficiency caused by excessive use of nitrogen (N) fertilizer is a major problem in agriculture and a hot topic of research. Most studies have focused on the effect of N application rate on N efficiency, whereas there are limited studies on changing the N form to improve N yield and efficiency. Here, the effects of different N application rates and nitrate-to-ammonium N ratios on post-anthesis carbon (C) and N metabolism and maize yield under shallow-buried drip irrigation were investigated. Two rates of N application (210 kg·ha-1 (NA1) and 300 kg·ha-1 (NA2)) and three nitrate-to-ammonium N ratios (2:1 (NF1), 3:1 (NF2), and 4:1 (NF3)) were utilized. Post-anthesis photosynthetic characteristics, activities of key enzymes in photosynthetic C and N metabolism, nonstructural carbohydrate content, post-anthesis N accumulation and transportation, yield, and N-use efficiency were determined. At both N application rates, NF2 treatment enhanced photosynthetic activity in the ear-leaf at silking stage and promoted key enzyme activities of C and N metabolic pathways, compared with NF1 and NF3. Furthermore, NF2 significantly increased nonstructural carbohydrate accumulation (4.00-64.71%), post-anthesis N accumulation and transportation (11.00-38.00%), and grain yield (2.60-13.08%). No significant differences between NA1 and NA2 were observed under NF2 in most of the measured variables; however, NA1 had higher N-use efficiency. Thus, the optimal treatment under shallow-buried drip irrigation was a N application rate of 210 kg ha-1 and a nitrate-to-ammonium N ratio of 3:1. These findings provide theoretical guidance on appropriate N applications for high-yield maize production.
| Medienart: |
E-Artikel |
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| Erscheinungsjahr: |
2024 |
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| Erschienen: |
2024 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:12 |
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| Enthalten in: |
PeerJ - 12(2024) vom: 31., Seite e16548 |
| Sprache: |
Englisch |
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| Beteiligte Personen: |
Meng, Fanhao [VerfasserIn] |
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| Links: |
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| Themen: |
7440-44-0 |
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| Anmerkungen: |
Date Completed 09.01.2024 Date Revised 09.01.2024 published: Electronic-eCollection Citation Status MEDLINE |
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| doi: |
10.7717/peerj.16548 |
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| funding: |
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| Förderinstitution / Projekttitel: |
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NLM366787748 |
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| 520 | |a Reduced fertilizer efficiency caused by excessive use of nitrogen (N) fertilizer is a major problem in agriculture and a hot topic of research. Most studies have focused on the effect of N application rate on N efficiency, whereas there are limited studies on changing the N form to improve N yield and efficiency. Here, the effects of different N application rates and nitrate-to-ammonium N ratios on post-anthesis carbon (C) and N metabolism and maize yield under shallow-buried drip irrigation were investigated. Two rates of N application (210 kg·ha-1 (NA1) and 300 kg·ha-1 (NA2)) and three nitrate-to-ammonium N ratios (2:1 (NF1), 3:1 (NF2), and 4:1 (NF3)) were utilized. Post-anthesis photosynthetic characteristics, activities of key enzymes in photosynthetic C and N metabolism, nonstructural carbohydrate content, post-anthesis N accumulation and transportation, yield, and N-use efficiency were determined. At both N application rates, NF2 treatment enhanced photosynthetic activity in the ear-leaf at silking stage and promoted key enzyme activities of C and N metabolic pathways, compared with NF1 and NF3. Furthermore, NF2 significantly increased nonstructural carbohydrate accumulation (4.00-64.71%), post-anthesis N accumulation and transportation (11.00-38.00%), and grain yield (2.60-13.08%). No significant differences between NA1 and NA2 were observed under NF2 in most of the measured variables; however, NA1 had higher N-use efficiency. Thus, the optimal treatment under shallow-buried drip irrigation was a N application rate of 210 kg ha-1 and a nitrate-to-ammonium N ratio of 3:1. These findings provide theoretical guidance on appropriate N applications for high-yield maize production | ||
| 650 | 4 | |a Journal Article | |
| 650 | 4 | |a Carbon and nitrogen metabolic pathways | |
| 650 | 4 | |a Maize | |
| 650 | 4 | |a Nitrate-to-ammonium nitrogen ratio | |
| 650 | 4 | |a Yield | |
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| 650 | 7 | |a Nitrogen |2 NLM | |
| 650 | 7 | |a N762921K75 |2 NLM | |
| 650 | 7 | |a Ammonium Compounds |2 NLM | |
| 650 | 7 | |a Carbohydrates |2 NLM | |
| 700 | 1 | |a Zhang, Ruifu |e verfasserin |4 aut | |
| 700 | 1 | |a Zhang, Yuqin |e verfasserin |4 aut | |
| 700 | 1 | |a Li, Weimin |e verfasserin |4 aut | |
| 700 | 1 | |a Zhang, Yushan |e verfasserin |4 aut | |
| 700 | 1 | |a Zhang, Mingwei |e verfasserin |4 aut | |
| 700 | 1 | |a Yang, Xuezhen |e verfasserin |4 aut | |
| 700 | 1 | |a Yang, Hengshan |e verfasserin |4 aut | |
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