Abstract
An increasing interest has been reported regarding the reintroduction of flax in the Mediterranean region. The aim of this present study was to evaluate the effects of nitrogen (N) fertilization on the performance of flax cv. Everest, under Mediterranean climate conditions. A two-year study was carried out in 2018–2019, in Western Greece. The experiment was set-up in a randomized complete block design with four replications and six treatments of different N fertilization rates (0, 20, 30, 40, 50, and 60 kg N ha−1). Measurements included plant biomass, the leaf area index (LAI), the yield, and the Growth Degree Days (GDDs) required for full seed maturity. The N uptake of flax was also evaluated utilizing the Nitrogen Harvesting (NHI) and Nitrogen Utilization Efficiency (NUtE) indices. Although the highest fertilization rate (60N) increased the yield by 35.4% (2018) and 23.1% (2019), a GDDs and N indices assessment revealed that it noted the lowest efficiency and may lead to significant yield losses, as it significantly prolonged the crop cycle. On the contrary, even though fertilization rates of 20 and 30 kg N ha−1 increased the yield only by 7% and 15% (on average), they were more efficient, and prolonged the crop cycle less (compared to 60N).
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Claims 8
Claim · model-written summary
The 60N rate increased flax yield by 35.4% in 2018.
- Taxon
- flax
Linum usitatissimume1 - Material
- Evereste1
- Treatment
- highest fertilization rate (60N)e0
- Outcome
- yielde0
- Direction
- increasede0
- Value
- 35.4%e0
- Qualifier
- 2018e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the highest fertilization rate (60N) increased the yield by 35.4% (2018) and 23.1% (2019)”
e1“performance of flax cv. Everest”
Claim · model-written summary
The 60N rate increased flax yield by 23.1% in 2019.
- Taxon
- flaxLinum usitatissimume1
- Material
- Evereste1
- Treatment
- highest fertilization rate (60N)e0
- Outcome
- yielde0
- Direction
- increasede0
- Value
- 23.1%e0
- Qualifier
- 2019e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the highest fertilization rate (60N) increased the yield by 35.4% (2018) and 23.1% (2019)”
e1“performance of flax cv. Everest”
Claim · model-written summary
The 60N rate had the lowest nitrogen efficiency.
- Taxon
- flaxLinum usitatissimume1
- Treatment
- highest fertilization rate (60N)e0
- Outcome
- efficiencye0
- Direction
- loweste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the highest fertilization rate (60N) increased the yield by 35.4% (2018) and 23.1% (2019), a GDDs and N indices assessment revealed that it noted the lowest efficiency”
e1“performance of flax cv. Everest”
Claim · model-written summary
The 60N rate significantly prolonged the flax crop cycle.
- Taxon
- flaxLinum usitatissimume2
- Treatment
- highest fertilization rate (60N)e0
- Outcome
- crop cyclee1
- Direction
- prolongede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the highest fertilization rate (60N)”
e1“it significantly prolonged the crop cycle.”
e2“performance of flax cv. Everest”
Claim · model-written summary
The 20 kg N ha−1 rate increased flax yield by 7% on average.
- Taxon
- flaxLinum usitatissimume1
- Treatment
- 20e0
- Outcome
- yielde0
- Direction
- increasede0
- Value
- 7%e0
- Qualifier
- on averagee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“fertilization rates of 20 and 30 kg N ha−1 increased the yield only by 7% and 15% (on average)”
e1“performance of flax cv. Everest”
Claim · model-written summary
The 30 kg N ha−1 rate increased flax yield by 15% on average.
- Taxon
- flaxLinum usitatissimume1
- Treatment
- 30 kg N ha−1e0
- Outcome
- yielde0
- Direction
- increasede0
- Value
- 15%e0
- Qualifier
- on averagee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“fertilization rates of 20 and 30 kg N ha−1 increased the yield only by 7% and 15% (on average)”
e1“performance of flax cv. Everest”
Claim · model-written summary
The 20 and 30 kg N ha−1 rates were more efficient than 60N.
- Taxon
- flaxLinum usitatissimume2
- Treatment
- fertilization rates of 20 and 30 kg N ha−1e0
- Outcome
- efficiente1
- Direction
- moree1
- Comparator
- 60Ne1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“fertilization rates of 20 and 30 kg N ha−1”
e1“they were more efficient, and prolonged the crop cycle less (compared to 60N).”
e2“performance of flax cv. Everest”
Claim · model-written summary
The 20 and 30 kg N ha−1 rates prolonged the crop cycle less than 60N.
- Taxon
- flaxLinum usitatissimume2
- Treatment
- fertilization rates of 20 and 30 kg N ha−1e0
- Outcome
- crop cyclee1
- Direction
- lesse1
- Comparator
- 60Ne1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“fertilization rates of 20 and 30 kg N ha−1”
e1“they were more efficient, and prolonged the crop cycle less (compared to 60N).”
e2“performance of flax cv. Everest”
The same questions in other papers
nitrogen · yield · Linum usitatissimum (flax)Results differ
58 papers in the same direction as this paper · 2 in the opposite direction
- positive
- positive
- negative
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See all 61 papers →fertilization · yield · Linum usitatissimum (flax)Results differ
83 papers in the same direction as this paper · 9 in the opposite direction · 2 reporting no difference from an alternative
- no effect
- positive
- no effect
91 papers more in this group
See all 95 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.