Abstract
Abstract The soluble nitrogen (N) components in sugar beet seriously impair sugar recovery. The only N component determined routinely in the sugar factory is amino N (the sum of amino acids in the beet), which is assumed to reflect all the other N components. Amino N is affected by N supply and variety, but only little is known about the other N components such as total soluble N, betaine and nitrate. This study aimed at investigating the effect of N supply on the N composition of sugar beet varieties with special emphasis on N supply by variety interactions. In 2001 and 2002, field trials with four varieties and four N treatments were carried out at six sites in Germany. Storage root yield and the concentrations of sucrose, sodium, amino N, betaine, nitrate and total soluble N in the beet were determined. With increasing N supply, the concentration of amino N increased considerably and that of nitrate slightly, whereas that of betaine remained rather constant. Thus, the N composition of sugar beet changed with increasing N supply and the percentage of amino N of total soluble N increased. Although amino N has the closest correlation with total soluble N, for quality assessment it may overestimate the effect of N supply on other N components. Varieties clearly differed in root yield and quality as well as in all N components. The variety with the lowest amino N had the highest betaine concentration. However, as related to the concentration of total soluble N in the beet, for all varieties amino N as well as betaine showed the same response pattern. This indicates that the N composition of sugar beet is determined by the level of total soluble N, irrespective of variety or N supply. All varieties required the same N supply for obtaining maximum yield or quality. N supply did not affect the ranking of the varieties for all parameters studied, consequently it need not be considered for variety choice.
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Claims 12
Claim · model-written summary
Amino N concentration increased considerably with N supply.
- Taxon
- sugar beet
Beta vulgaris subsp. vulgarist0 - Treatment
- increasing N supplye0
- Outcome
- concentration of amino Ne0
- Direction
- increased considerablye0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“With increasing N supply, the concentration of amino N increased considerably and that of nitrate slightly, whereas that of betaine remained rather constant.”
t0“Sugar Beet”
Claim · model-written summary
Nitrate concentration increased slightly with N supply.
- Taxon
- sugar beetBeta vulgaris subsp. vulgarist0
- Treatment
- increasing N supplye0
- Outcome
- nitratee0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“With increasing N supply, the concentration of amino N increased considerably and that of nitrate slightly, whereas that of betaine remained rather constant.”
t0“Sugar Beet”
Claim · model-written summary
Betaine concentration remained rather constant as N supply increased.
- Taxon
- sugar beetBeta vulgaris subsp. vulgarist0
- Treatment
- increasing N supplye0
- Outcome
- betainee0
- Direction
- remained rather constante0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“With increasing N supply, the concentration of amino N increased considerably and that of nitrate slightly, whereas that of betaine remained rather constant.”
t0“Sugar Beet”
Claim · model-written summary
The share of total soluble N represented by amino N increased with N supply.
- Taxon
- sugar beetBeta vulgaris subsp. vulgarise0
- Treatment
- increasing N supplye0
- Outcome
- percentage of amino N of total soluble Ne0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Thus, the N composition of sugar beet changed with increasing N supply and the percentage of amino N of total soluble N increased.”
Claim · model-written summary
Amino N had the closest correlation with total soluble N.
- Taxon
- sugar beetBeta vulgaris subsp. vulgarist0
- Compound
- amino Ne0
- Outcome
- correlation with total soluble Ne0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Although amino N has the closest correlation with total soluble N, for quality assessment it may overestimate the effect of N supply on other N components.”
t0“Sugar Beet”
Claim · model-written summary
Varieties differed in root yield, quality and all N components.
- Taxon
- sugar beetBeta vulgaris subsp. vulgarist0
- Outcome
- root yield and quality as well as in all N componentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Varieties clearly differed in root yield and quality as well as in all N components.”
t0“Sugar Beet”
Claim · model-written summary
The variety lowest in amino N had the highest betaine concentration.
- Taxon
- sugar beetBeta vulgaris subsp. vulgarist0
- Material
- varietye0
- Outcome
- betaine concentratione0
- Direction
- higheste0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The variety with the lowest amino N had the highest betaine concentration.”
t0“Sugar Beet”
Claim · model-written summary
Across varieties, amino N showed the same response pattern relative to total soluble N.
- Taxon
- sugar beetBeta vulgaris subsp. vulgarist0
- Compound
- total soluble Ne0
- Outcome
- amino Ne0
- Direction
- same response patterne0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“However, as related to the concentration of total soluble N in the beet, for all varieties amino N as well as betaine showed the same response pattern.”
t0“Sugar Beet”
Claim · model-written summary
Across varieties, betaine showed the same response pattern relative to total soluble N.
- Taxon
- sugar beetBeta vulgaris subsp. vulgarist0
- Compound
- total soluble Ne0
- Outcome
- betainee0
- Direction
- same response patterne0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“However, as related to the concentration of total soluble N in the beet, for all varieties amino N as well as betaine showed the same response pattern.”
t0“Sugar Beet”
Claim · model-written summary
All varieties required the same N supply for maximum yield or quality.
- Taxon
- sugar beetBeta vulgaris subsp. vulgarist0
- Outcome
- maximum yield or qualitye0
- Direction
- samee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“All varieties required the same N supply for obtaining maximum yield or quality.”
t0“Sugar Beet”
Claim · model-written summary
N supply did not alter variety ranking for the studied parameters.
- Taxon
- sugar beetBeta vulgaris subsp. vulgarist0
- Treatment
- N supplye0
- Outcome
- ranking of the varietiese0
- Direction
- did not affecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“N supply did not affect the ranking of the varieties for all parameters studied, consequently it need not be considered for variety choice.”
t0“Sugar Beet”
Claim · model-written summary
The authors conclude N supply need not be considered when choosing a variety.
- Taxon
- sugar beetBeta vulgaris subsp. vulgarist0
- Outcome
- need not be considered for variety choicee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“N supply did not affect the ranking of the varieties for all parameters studied, consequently it need not be considered for variety choice.”
t0“Sugar Beet”
The same questions in other papers
nitrogen · molecular: metabolites · Beta vulgaris (beet)Positive and negative results
36 papers in the same direction as this paper · 29 in the opposite direction
- negative
- positive
- positive
62 papers more in this group
See all 66 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.