Abstract
Optimizing fertilization practices can reduce the application of chemical nitrogen fertilizers, thereby enhancing crop yield while mitigating environmental impacts. In 2021–2022, we conducted field experiments in the Inner Mongolia region, evaluating the effects of different nitrogen application methods on sugar beet growth and productivity. A two-factor randomized complete block design was applied for the experiments with the nitrogen application rates (0, 75, 150, 225, and 300 kg ha−1, denoted as N0, N75, N150, N225, N300, respectively) as the primary factor and the nitrogen application methods (single basal application, S1; and split application, S2) as the second factor. The results indicate that increasing nitrogen application rates significantly enhances leaf growth, chlorophyll content, dry matter accumulation, nitrogen metabolism, and yield. In comparison with a nitrogen-free treatment, the N225S1 treatment significantly improved sugar beet development and nitrogen metabolism, resulting in an average yield increase of 29.36% over two years. Notably, by optimizing the root–shoot balance and carbon–nitrogen metabolism, N150S2 achieved root and sugar yields comparable to N225S1. Therefore, our study demonstrates that split nitrogen application can maintain sugar beet yield while reducing nitrogen fertilizer inputs, thereby providing valuable insights for sustainable sugar beet cultivation in Inner Mongolia, the main sugar beet growing area in China.
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Claims 11
Claim · model-written summary
Increasing nitrogen application rates significantly enhanced sugar beet leaf growth.
- Taxon
- sugar beet
Beta vulgaris subsp. vulgarise1 - Treatment
- increasing nitrogen application ratese0
- Outcome
- leaf growthe0
- Direction
- enhancese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“increasing nitrogen application rates significantly enhances leaf growth, chlorophyll content, dry matter accumulation, nitrogen metabolism, and yield”
e1“sugar beet growth and productivity”
Claim · model-written summary
Increasing nitrogen application rates significantly enhanced chlorophyll content.
- Taxon
- sugar beetBeta vulgaris subsp. vulgarise1
- Treatment
- increasing nitrogen application ratese0
- Outcome
- chlorophyll contente0
- Direction
- enhancese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“increasing nitrogen application rates significantly enhances leaf growth, chlorophyll content, dry matter accumulation, nitrogen metabolism, and yield”
e1“sugar beet growth and productivity”
Claim · model-written summary
Increasing nitrogen application rates significantly enhanced dry matter accumulation.
- Taxon
- sugar beetBeta vulgaris subsp. vulgarise1
- Treatment
- increasing nitrogen application ratese0
- Outcome
- dry matter accumulatione0
- Direction
- enhancese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“increasing nitrogen application rates significantly enhances leaf growth, chlorophyll content, dry matter accumulation, nitrogen metabolism, and yield”
e1“sugar beet growth and productivity”
Claim · model-written summary
Increasing nitrogen application rates significantly enhanced nitrogen metabolism.
- Taxon
- sugar beetBeta vulgaris subsp. vulgarise1
- Treatment
- increasing nitrogen application ratese0
- Outcome
- nitrogen metabolisme0
- Direction
- enhancese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“increasing nitrogen application rates significantly enhances leaf growth, chlorophyll content, dry matter accumulation, nitrogen metabolism, and yield”
e1“sugar beet growth and productivity”
Claim · model-written summary
Increasing nitrogen application rates significantly enhanced yield.
- Taxon
- sugar beetBeta vulgaris subsp. vulgarise1
- Treatment
- increasing nitrogen application ratese0
- Outcome
- yielde0
- Direction
- enhancese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“increasing nitrogen application rates significantly enhances leaf growth, chlorophyll content, dry matter accumulation, nitrogen metabolism, and yield”
e1“sugar beet growth and productivity”
Claim · model-written summary
N225S1 significantly improved sugar beet development compared with no nitrogen.
- Taxon
- sugar beetBeta vulgaris subsp. vulgarise0
- Treatment
- N225S1 treatmente0
- Outcome
- sugar beet developmente0
- Direction
- improvede0
- Comparator
- nitrogen-free treatmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In comparison with a nitrogen-free treatment, the N225S1 treatment significantly improved sugar beet development and nitrogen metabolism”
Claim · model-written summary
N225S1 significantly improved nitrogen metabolism compared with no nitrogen.
- Taxon
- sugar beetBeta vulgaris subsp. vulgarise0
- Treatment
- N225S1 treatmente0
- Outcome
- nitrogen metabolisme0
- Direction
- improvede0
- Comparator
- nitrogen-free treatmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In comparison with a nitrogen-free treatment, the N225S1 treatment significantly improved sugar beet development and nitrogen metabolism”
Claim · model-written summary
N225S1 raised average sugar beet yield 29.36% over two years relative to no nitrogen.
- Taxon
- sugar beetBeta vulgaris subsp. vulgarise0
- Treatment
- N225S1 treatmente0
- Outcome
- yielde0
- Direction
- increasee0
- Value
- 29.36%e0
- Qualifier
- over two yearse0
- Comparator
- nitrogen-free treatmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In comparison with a nitrogen-free treatment, the N225S1 treatment significantly improved sugar beet development and nitrogen metabolism, resulting in an average yield increase of 29.36% over two years”
Claim · model-written summary
N150S2 achieved root yield comparable to N225S1.
- Taxon
- sugar beetBeta vulgaris subsp. vulgarise1
- Treatment
- N150S2e0
- Outcome
- roote0
- Direction
- comparablee0
- Comparator
- N225S1e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“N150S2 achieved root and sugar yields comparable to N225S1”
e1“improved sugar beet development and nitrogen metabolism”
Claim · model-written summary
N150S2 achieved sugar yield comparable to N225S1.
- Taxon
- sugar beetBeta vulgaris subsp. vulgarise1
- Treatment
- N150S2e0
- Outcome
- sugar yieldse0
- Direction
- comparablee0
- Comparator
- N225S1e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“N150S2 achieved root and sugar yields comparable to N225S1”
e1“improved sugar beet development and nitrogen metabolism”
Claim · model-written summary
Split nitrogen application can maintain yield while reducing fertilizer inputs.
- Taxon
- sugar beetBeta vulgaris subsp. vulgarise0
- Outcome
- maintain sugar beet yield while reducing nitrogen fertilizer inputse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“split nitrogen application can maintain sugar beet yield while reducing nitrogen fertilizer inputs”
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