Abstract
The effects of supplying the fertilizer nitrogen (N) as a recommended quantity of ammonium nitrate or as a commonly used dose of poultry manure on yield of sugarbeet infected with Beet mild yellowing virus (BMYV) or Beet yellows virus (BYV) were studied in field experiments at IACR-Broom's Barn in 1990, 1991 and 1992. Three N fertilizer treatments comprising Zero (N0), standard rate of 110 kg N/ha (N1) and poultry manure equivalent to c . 300 kg/ha of available N (N2) were applied to plots which were uninoculated or were subsequently inoculated with either BMYV or BYV. Averaged over virus treatments, N1 increased sugar yields by 23% relative to N0: there was no further increase when N2 was applied. When averaged over N treatments, early virus yellows infection reduced the sugar yields by 23%. Generally there was no significant interaction between N supply and virus infection. There was no evidence that the large N supply could reduce the yield effect of virus yellows infection, as had previously been thought. Crops infected from late July produced similar yields to uninoculated controls. The main effect of virus yellows was to reduce the efficiency of radiation conversion even when account was taken of the light intercepted by yellow foliage. Whilst the N2 treatment helped to maintain a green leaf cover throughout the season on virus yellows infected crops, it had no effect on virus replication. Beet processing quality was impaired by increasing the N supply and by virus infection, but again there were generally no significant interactions between infection and N rate.
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Claims 10
Claim · model-written summary
Standard nitrogen increased sugar yield 23% relative to zero nitrogen.
- Taxon
- sugarbeet (Beta vulgaris)
Beta vulgarist0 - Treatment
- N1e0
- Outcome
- sugar yieldse0
- Direction
- increasede0
- Value
- 23%e0
- Comparator
- N0e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“N1 increased sugar yields by 23% relative to N0”
t0“sugarbeet (Beta vulgaris)”
Claim · model-written summary
Higher N2 supply gave no further sugar yield increase.
- Taxon
- sugarbeet (Beta vulgaris)Beta vulgarist0
- Treatment
- N2e0
- Outcome
- sugar yieldse1
- Direction
- no further increasee0
- Comparator
- N1e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“there was no further increase when N2 was applied”
t0“sugarbeet (Beta vulgaris)”
e1“N1 increased sugar yields by 23% relative to N0”
Claim · model-written summary
Early virus yellows infection reduced sugar yields by 23%.
- Taxon
- sugarbeet (Beta vulgaris)Beta vulgarist0
- Treatment
- early virus yellows infectione0
- Interactor
- virus yellowse0pathogen
- Outcome
- sugar yieldse0
- Direction
- reducede0
- Value
- 23%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“early virus yellows infection reduced the sugar yields by 23%”
t0“sugarbeet (Beta vulgaris)”
Claim · model-written summary
Nitrogen supply and virus infection generally lacked a significant interaction.
- Taxon
- sugarbeet (Beta vulgaris)Beta vulgarist0
- Treatment
- N supplye0
- Interactor
- viruse0pathogen
- Outcome
- interaction between N supply and virus infectione0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Generally there was no significant interaction between N supply and virus infection”
t0“sugarbeet (Beta vulgaris)”
Claim · model-written summary
Late-July virus infection produced yields similar to uninoculated crops.
- Taxon
- sugarbeet (Beta vulgaris)Beta vulgarist0
- Treatment
- infected from late Julye0
- Outcome
- yieldse0
- Direction
- similare0
- Comparator
- uninoculated controlse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Crops infected from late July produced similar yields to uninoculated controls”
t0“sugarbeet (Beta vulgaris)”
e1“early virus yellows infection reduced the sugar yields by 23%”
Claim · model-written summary
Virus yellows reduced radiation conversion efficiency.
- Taxon
- sugarbeet (Beta vulgaris)Beta vulgarist0
- Treatment
- virus yellowse0
- Interactor
- viruse0pathogen
- Outcome
- efficiency of radiation conversione0
- Direction
- reducee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“virus yellows was to reduce the efficiency of radiation conversion even when account was taken of the light intercepted by yellow foliage”
t0“sugarbeet (Beta vulgaris)”
Claim · model-written summary
N2 maintained green leaf cover in infected sugarbeet.
- Taxon
- sugarbeet (Beta vulgaris)Beta vulgarist0
- Treatment
- N2 treatmente0
- Interactor
- virus yellowse0pathogen
- Outcome
- green leaf covere0
- Direction
- maintaine0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“N2 treatment helped to maintain a green leaf cover throughout the season on virus yellows infected crops”
t0“sugarbeet (Beta vulgaris)”
Claim · model-written summary
N2 did not affect virus replication.
- Taxon
- sugarbeet (Beta vulgaris)Beta vulgarist0
- Treatment
- N2 treatmente0
- Interactor
- viruse0pathogen
- Outcome
- virus replicatione0
- Direction
- no effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Whilst the N2 treatment helped to maintain a green leaf cover throughout the season on virus yellows infected crops, it had no effect on virus replication”
t0“sugarbeet (Beta vulgaris)”
Claim · model-written summary
Increasing nitrogen impaired beet processing quality.
- Taxon
- sugarbeet (Beta vulgaris)Beta vulgarist0
- Treatment
- increasing the N supplye0
- Outcome
- Beet processing qualitye0
- Direction
- impairede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Beet processing quality was impaired by increasing the N supply and by virus infection”
t0“sugarbeet (Beta vulgaris)”
Claim · model-written summary
Virus infection impaired beet processing quality.
- Taxon
- sugarbeet (Beta vulgaris)Beta vulgarist0
- Treatment
- virus infectione0
- Interactor
- viruse0pathogen
- Outcome
- Beet processing qualitye0
- Direction
- impairede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Beet processing quality was impaired by increasing the N supply and by virus infection”
t0“sugarbeet (Beta vulgaris)”
The same questions in other papers
infection · yield · Beta vulgaris (beet)Positive and negative results
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7 papers in the same direction as this paper · 15 in the opposite direction
- positive
- positive
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See all 23 papers →infection · quality: general · Beta vulgaris (beet)Results agree
1 paper in the same direction as this paper
- negative
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.