Abstract
Nitrogen (N) management for sugarbeet is challenging due to the variable effects of weather on soil N transformations and N losses, and may be particularly difficult on soils subject to N leaching. A field study was conducted to determine if extending the in-season N application termination date beyond the conventional cutoff date of 10 weeks after planting would improve sucrose yield. Three in-season N application timing treatments were evaluated, each consisting of three fertigation events totaling 84 kg N ha -1 in addition to a preplant application of 67 kg N ha -1 . Treatments were 28 kg N ha -1 applied: (1) every 7-8 days from June 15 to June 30 (10 weeks after planting); (2) every 14-16 days from June 15 to July 15; and (3) every 28 to 32 days from June 15 to August 15. Treatments did not affect yield components, except in 2009 when terminating N application on August 15 reduced root sucrose concentration by 6.0 g kg -1 . Compared to the conventional June 30 cutoff, gross economic return was negligible for the July 15 cutoff and was consistently negative (-$146 ha -1 ) for the August 15 cutoff showing no advantage to extending the N application period beyond June 30.
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Claims 5
Claim · model-written summary
Fertigation timing generally did not affect yield components.
- Taxon
- sugarbeet
Beta vulgaris subsp. vulgarist0 - Treatment
- Treatmentse0
- Outcome
- yield componentse0
- Direction
- did not affecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Treatments did not affect yield components, except in 2009 when terminating N application on August 15 reduced root sucrose concentration by 6.0 g kg -1 .”
t0“sugarbeet”
Claim · model-written summary
In 2009, August 15 termination reduced root sucrose concentration by 6.0 g kg -1.
- Taxon
- sugarbeetBeta vulgaris subsp. vulgarist0
- Treatment
- terminating N application on August 15e0
- Outcome
- root sucrose concentratione0
- Direction
- reducede0
- Value
- 6.0 g kg -1e0
- Qualifier
- in 2009e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in 2009 when terminating N application on August 15 reduced root sucrose concentration by 6.0 g kg -1”
t0“sugarbeet”
Claim · model-written summary
The July 15 cutoff produced negligible gross economic return relative to June 30.
- Taxon
- sugarbeetBeta vulgaris subsp. vulgarist0
- Treatment
- July 15 cutoffe0
- Outcome
- gross economic returne0
- Direction
- negligiblee0
- Comparator
- conventional June 30 cutoffe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Compared to the conventional June 30 cutoff, gross economic return was negligible for the July 15 cutoff”
t0“sugarbeet”
Claim · model-written summary
The August 15 cutoff produced consistently negative gross return of -$146 ha -1 relative to June 30.
- Taxon
- sugarbeetBeta vulgaris subsp. vulgarist0
- Treatment
- August 15 cutoffe0
- Outcome
- gross economic returne0
- Direction
- negativee0
- Value
- -$146 ha -1e0
- Comparator
- conventional June 30 cutoffe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Compared to the conventional June 30 cutoff, gross economic return was negligible for the July 15 cutoff and was consistently negative (-$146 ha -1 ) for the August 15 cutoff”
t0“sugarbeet”
Claim · model-written summary
The authors conclude that extending N application beyond June 30 has no advantage.
- Taxon
- sugarbeetBeta vulgaris subsp. vulgarist0
- Outcome
- no advantage to extending the N application period beyond June 30e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“showing no advantage to extending the N application period beyond June 30”
t0“sugarbeet”
The same questions in other papers
nitrogen · molecular: metabolites · Beta vulgaris (beet)Positive and negative results
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