Abstract
Abstract Strawberry (Fragaria ananassa cv. Aliso) plants were grown under three N‐rates in the nursery: 80, 320 and 640 kg N/ha, and then transplanted to the fruiting field. Plants from each nursery treatment were given 150, 300 and 450 kg N/ha. The fertilizer was given as ammonium sulfate in the nursery and as ammonium nitrate in the field, a part broadcasted before planting and the other part applied as top dressings. Biomass production, plantlets size distribution and N content were restricted by the lowest level of N given in the nursery. Plants grown at 320 kg N/ha in the nursery gave significantly earlier and higher total yields than those grown at the other rates. Fruit yields were not significantly influenced by the N‐application in the field. N fertilization in the early stages of strawberry plant development in the nursery is more important than later field application. The influence of N fertilization on the growth and yield of strawberry plants has been studied by several workers. In some reports yields were increased when the rate of N applied was increased (1, 2, 3). In other studies no influence was found (4, 5, 6), or even a decrease in yield was reported as the rate of applied N was increased (7). While in some studies detrimental effects of N‐fertilizer on fruit yield were observed at 200–300 kg N/ha (8, 9), in other studies (6, 7) N applications up to 400 kg/ha did not affect yield. In Spain (3), adding up to 680 kg/ha caused an increase in fruit yield. Even at relatively low applied‐N levels, up to 150 kg N/ha, strawberry response reports are not consistent. Some workers found that increasing N in this range caused an increase in fruit yield (8, 9, 3, 7, 10), while no effect was observed (4, 5, 6, 11) in several other studies. Most of the reported experiments with N‐fertilizer were carried out after plants were transplanted from the nursery to the field. To the best of our knowledge no attempt was made to evaluate the effect of fertilizer applied in the nursery. The objective of this work was to evaluate the influence of different levels of N‐fertilizer, in both the nursery and the field, on strawberry plant development and composition, earliness, yield level and yield distribution. Key words: Fruiting timevegetative growthammonium nitrate
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Claims 5
Claim · model-written summary
Biomass production, plantlet size distribution and N content of strawberry were restricted by the lowest nursery N level.
- Taxon
- Strawberry
_single2.jpg?width=60)
Fragaria ×ananassae0 - Material
- Alisoe0
- Treatment
- the lowest level of N given in the nurserye1
- Outcome
- Biomass production, plantlets size distribution and N contente1
- Direction
- restrictede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_single2.jpg?width=500)
Verbatim
e0“Strawberry (Fragaria ananassa cv. Aliso) plants were grown”
e1“Biomass production, plantlets size distribution and N content were restricted by the lowest level of N given in the nursery”
Claim · model-written summary
Strawberry plants grown at 320 kg N/ha in the nursery gave higher total yields than those at the other rates.
- Taxon
- StrawberryFragaria ×ananassae0
- Material
- Alisoe0
- Treatment
- 320 kg N/ha in the nurserye2
- Outcome
- total yieldse2
- Direction
- highere2
- Comparator
- other ratese2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Strawberry (Fragaria ananassa cv. Aliso) plants were grown”
e2“Plants grown at 320 kg N/ha in the nursery gave significantly earlier and higher total yields than those grown at the other rates”
Claim · model-written summary
Strawberry plants grown at 320 kg N/ha in the nursery gave earlier yields than those at the other rates.
- Taxon
- StrawberryFragaria ×ananassae0
- Material
- Alisoe0
- Treatment
- 320 kg N/ha in the nurserye2
- Outcome
- yieldse2
- Direction
- earliere2
- Comparator
- other ratese2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Strawberry (Fragaria ananassa cv. Aliso) plants were grown”
e2“Plants grown at 320 kg N/ha in the nursery gave significantly earlier and higher total yields than those grown at the other rates”
Claim · model-written summary
Fruit yields of strawberry were not significantly influenced by nitrogen application in the field.
- Taxon
- StrawberryFragaria ×ananassae0
- Material
- Alisoe0
- Treatment
- in the fielde3
- Outcome
- Fruit yieldse3
- Direction
- not significantly influencede3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Strawberry (Fragaria ananassa cv. Aliso) plants were grown”
e3“Fruit yields were not significantly influenced by the N‐application in the field”
Claim · model-written summary
Nitrogen fertilization in the early nursery stages is more important for strawberry than later field application.
- Taxon
- StrawberryFragaria ×ananassae0
- Outcome
- N fertilization in the early stagese4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Strawberry (Fragaria ananassa cv. Aliso) plants were grown”
e4“N fertilization in the early stages of strawberry plant development in the nursery is more important than later field application”
The same questions in other papers
nitrogen · yield · Fragaria x ananassa (strawberry)Results differ
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- positive
- positive
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See all 60 papers →transplanting · yield · Fragaria x ananassa (strawberry)Positive and negative results
7 papers in the same direction as this paper · 10 in the opposite direction · 2 reporting no difference from an alternative
- no effect
- negative
- no effect
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See all 20 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.