Abstract
Abstract Nitrogen fertilization of sugarbeet ( Beta vulgaris L.) usually increases root yields but decreases sucrose concentration. Therefore, management strategies must aim at an optimization of both that leads to maximum sucrose yield and not root yield. This study explored the value of applying N in increments to increase sucrose production and decrease top growth and impurities of the sugarbeet crop. The soil was depleted of N by cropping with corn ( Zea mays L.) each year prior to the sugarbeet production year. Total N rates from 30 to 300 kg ha −1 N were applied in increments of 30,60, and 90 kg ha −1 over a time span of 16 wk each year of the experiment for 3 yr on a Tripp very fine sandy loam (coarse‐silty, mixed, mesic Typic Haplustoll). A series of hail storms in the second year of the experiment caused the N requirement to be higher for that year, as N in the leaves removed by the hail did not recycle. The first and third years demonstrated a normal pattern of greater top growth, lower sucrose concentration, and lower purity as N rates increased. Optimum N rates were 50 kg ha −1 higher for root yields than for maximum sucrose production. Delaying N supply by incrementing fertilizer applications favored root development and sucrose production but did not affect top growth.
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Claims 8
Claim · model-written summary
Hail in the second year raised nitrogen requirement.
Not reportedTaxon
Verbatim
e0“A series of hail storms in the second year of the experiment caused the N requirement to be higher for that year”
Claim · model-written summary
Increasing nitrogen rates increased sugarbeet top growth in years one and three.
- Taxon
- Sugarbeet
Beta vulgaris subsp. vulgarist0 - Treatment
- N ratese0
- Outcome
- top growthe0
- Direction
- greatere0
- Qualifier
- first and third yearse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The first and third years demonstrated a normal pattern of greater top growth, lower sucrose concentration, and lower purity as N rates increased”
t0“Sugarbeet”
Claim · model-written summary
Increasing nitrogen rates lowered sugarbeet sucrose concentration in years one and three.
- Taxon
- SugarbeetBeta vulgaris subsp. vulgarist0
- Treatment
- N ratese0
- Outcome
- sucrose concentratione0
- Direction
- lowere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The first and third years demonstrated a normal pattern of greater top growth, lower sucrose concentration, and lower purity as N rates increased”
t0“Sugarbeet”
Claim · model-written summary
Increasing nitrogen rates lowered sugarbeet purity in years one and three.
- Taxon
- SugarbeetBeta vulgaris subsp. vulgarist0
- Treatment
- N ratese0
- Outcome
- puritye0
- Direction
- lowere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The first and third years demonstrated a normal pattern of greater top growth, lower sucrose concentration, and lower purity as N rates increased”
t0“Sugarbeet”
Claim · model-written summary
Optimal nitrogen rate for sugarbeet root yield exceeded that for maximum sucrose production by 50 kg ha −1.
- Taxon
- SugarbeetBeta vulgaris subsp. vulgarist0
- Outcome
- Optimum N ratese0
- Direction
- highere0
- Value
- 50 kg ha −1e0
- Comparator
- maximum sucrose productione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Optimum N rates were 50 kg ha −1 higher for root yields than for maximum sucrose production”
t0“Sugarbeet”
Claim · model-written summary
Delayed nitrogen supply favored sugarbeet root development.
- Taxon
- SugarbeetBeta vulgaris subsp. vulgarist0
- Treatment
- Delaying N supply by incrementing fertilizer applicationse0
- Outcome
- root developmente0
- Direction
- favorede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Delaying N supply by incrementing fertilizer applications favored root development and sucrose production but did not affect top growth”
t0“Sugarbeet”
Claim · model-written summary
Delayed nitrogen supply favored sugarbeet sucrose production.
- Taxon
- SugarbeetBeta vulgaris subsp. vulgarist0
- Treatment
- Delaying N supply by incrementing fertilizer applicationse0
- Outcome
- sucrose productione0
- Direction
- favorede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Delaying N supply by incrementing fertilizer applications favored root development and sucrose production but did not affect top growth”
t0“Sugarbeet”
Claim · model-written summary
Delayed nitrogen supply did not affect sugarbeet top growth.
- Taxon
- SugarbeetBeta vulgaris subsp. vulgarist0
- Treatment
- Delaying N supply by incrementing fertilizer applicationse0
- Outcome
- top growthe0
- Direction
- did not affecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Delaying N supply by incrementing fertilizer applications favored root development and sucrose production but did not affect top growth”
t0“Sugarbeet”
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