Abstract
Abstract A field experiment was conducted to investigate the effect of nitrogen (N) application on the growth and metabolism of sugar beet (Beta vulgaris L.). Changes in nitrate, ammonium, soluble protein and pigment levels, nitrogen metabolism enzyme activity, biomass of leaves and beet, and sucrose and α-amino-N were studied in relation to five different NPK application rates (0, 50, 100, 150, and 200 kg N ha−1) and association with Azotobacter chrooccocum. The availability of nitrate and ammonium ions in the leaves proved to be influenced by the different nitrogen treatments. The most important enzymatic activities within nitrogen metabolism were affected negatively by the highest NPK rate. With increasing nitrogen supply, the concentration of α-amino-N increased considerably and that of sucrose decreased. Application of NPK had a significant positive effect on the growth and biomass production. The measured parameters of plants associated with A. chrooccocum were of similar magnitude comparing to the controls. Keywords: sugar beetnitrogen metabolism Azotobacter chrooccocum chlorophyllsucroseα-amino-n ACKNOWLEDGMENT This work was founded by the Ministry for Science and Environmental Protection of the Republic of Serbia.
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Claims 8
Claim · model-written summary
Different nitrogen treatments influenced leaf nitrate availability.
- Taxon
- sugar beet
Beta vulgaris subsp. vulgarist0 - Organ / stage
- leavese0
- Treatment
- different nitrogen treatmentse0
- Outcome
- availability of nitratee0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The availability of nitrate and ammonium ions in the leaves proved to be influenced by the different nitrogen treatments”
t0“SUGAR BEET”
Claim · model-written summary
Different nitrogen treatments influenced leaf ammonium availability.
- Taxon
- sugar beetBeta vulgaris subsp. vulgarist0
- Organ / stage
- leavese0
- Treatment
- different nitrogen treatmentse0
- Outcome
- ammonium ionse0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The availability of nitrate and ammonium ions in the leaves proved to be influenced by the different nitrogen treatments”
t0“SUGAR BEET”
Claim · model-written summary
The highest NPK rate negatively affected important nitrogen-metabolism enzyme activities.
- Taxon
- sugar beetBeta vulgaris subsp. vulgarist0
- Treatment
- highest NPK ratee0
- Outcome
- enzymatic activities within nitrogen metabolisme0
- Direction
- negativelye0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The most important enzymatic activities within nitrogen metabolism were affected negatively by the highest NPK rate”
t0“SUGAR BEET”
Claim · model-written summary
Increasing nitrogen supply increased α-amino-N concentration.
- Taxon
- sugar beetBeta vulgaris subsp. vulgarist0
- Treatment
- increasing nitrogen supplye0
- Outcome
- concentration of α-amino-Ne0
- Direction
- increased considerablye0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“With increasing nitrogen supply, the concentration of α-amino-N increased considerably and that of sucrose decreased”
t0“SUGAR BEET”
Claim · model-written summary
Increasing nitrogen supply decreased sucrose concentration.
- Taxon
- sugar beetBeta vulgaris subsp. vulgarist0
- Treatment
- increasing nitrogen supplye0
- Outcome
- sucrosee0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“With increasing nitrogen supply, the concentration of α-amino-N increased considerably and that of sucrose decreased”
t0“SUGAR BEET”
Claim · model-written summary
NPK increased sugar beet growth significantly.
- Taxon
- sugar beetBeta vulgaris subsp. vulgarist0
- Treatment
- Application of NPKe0
- Outcome
- growthe0
- Direction
- positivee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Application of NPK had a significant positive effect on the growth and biomass production”
t0“SUGAR BEET”
Claim · model-written summary
NPK increased sugar beet biomass production significantly.
- Taxon
- sugar beetBeta vulgaris subsp. vulgarist0
- Treatment
- Application of NPKe0
- Outcome
- biomass productione0
- Direction
- positivee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Application of NPK had a significant positive effect on the growth and biomass production”
t0“SUGAR BEET”
Claim · model-written summary
Measured parameters in plants associated with A. chrooccocum were similar to controls.
- Taxon
- sugar beetBeta vulgaris subsp. vulgarist0
- Treatment
- associated with A. chrooccocume0
- Interactor
- A. chrooccocume0symbiont
- Outcome
- measured parameterse0
- Direction
- similar magnitudee0
- Comparator
- controlse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The measured parameters of plants associated with A. chrooccocum were of similar magnitude comparing to the controls”
t0“SUGAR BEET”
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See all 267 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.