Abstract
The study analysed whether higher above-ground production due to fertilization was associated with increased light interception or higher light use efficiency in an Estonian Salix plantation in 1999-2001. The leaf area index (LAI), effective extinction coefficient, and clumping index differed in two studied Salix species. These parameters varied also largely during the vegetation period and due to different availability of mineral nutrients. The values of seasonally intercepted radiation were rather uniform. Though fertilization had a positive effect on LAI, the leaves of fertilized plots were more clumped, which offset the effect of high LAI in terms of light interception. The annual above-ground production and light use efficiency were higher in fertilized than in control plants. Above-ground production was closely related to light use efficiency, whereas the correlation between above-ground production and seasonally intercepted radiation was weaker.
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Claims 10
Claim · model-written summary
The two Salix species differed in leaf area index, extinction coefficient and clumping index.
- Outcome
- leaf area index (LAI), effective extinction coefficient, and clumping indexe0
SalixOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The leaf area index (LAI), effective extinction coefficient, and clumping index differed in two studied Salix species.”
Claim · model-written summary
Canopy parameters varied over the vegetation period and with mineral nutrient availability.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“These parameters varied also largely during the vegetation period and due to different availability of mineral nutrients.”
t0“willow species”
Claim · model-written summary
Seasonally intercepted radiation was rather uniform.
- Outcome
- seasonally intercepted radiatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The values of seasonally intercepted radiation were rather uniform.”
t0“willow species”
Claim · model-written summary
Fertilization increased Salix leaf area index.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“fertilization had a positive effect on LAI”
t0“willow species”
Claim · model-written summary
Leaves in fertilized plots were more clumped.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the leaves of fertilized plots were more clumped”
t0“willow species”
Claim · model-written summary
Greater leaf clumping offset the higher LAI effect on light interception.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the leaves of fertilized plots were more clumped, which offset the effect of high LAI in terms of light interception.”
t0“willow species”
Claim · model-written summary
Fertilized plants had higher annual above-ground production than controls.
- Treatment
- fertilizede0
- Outcome
- annual above-ground productione0
- Direction
- highere0
- Comparator
- control plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The annual above-ground production and light use efficiency were higher in fertilized than in control plants.”
t0“willow species”
Claim · model-written summary
Fertilized plants had higher light use efficiency than controls.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The annual above-ground production and light use efficiency were higher in fertilized than in control plants.”
t0“willow species”
Claim · model-written summary
Above-ground production was closely related to light use efficiency.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Above-ground production was closely related to light use efficiency”
t0“willow species”
Claim · model-written summary
Above-ground production correlated more weakly with seasonally intercepted radiation.
- Outcome
- correlation between above-ground production and seasonally intercepted radiatione0
- Direction
- weakere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the correlation between above-ground production and seasonally intercepted radiation was weaker.”
t0“willow species”
The same questions in other papers
fertilization · yield · Salix (willows)Results differ
7 papers in the same direction as this paper · 3 in the opposite direction
- no effect
- no effect
- no effect
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See all 11 papers →fertilization · growth · Salix (willows)Positive and negative results
9 papers in the same direction as this paper · 1 in the opposite direction
- positive
- negative
- positive
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See all 11 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.