Abstract
Container-grown Viburnum plicatum var. tomentosum `Mariesii' were planted in tilled beds and tilled beds amended with aged pine bark. After transplanting, plants were fertilized at three different rates: no fertilizer, 18.4 g of N m -2 , and 36.8 g of N m -2 . A 31 day drought was begun 73 days after planting. Fertilization of tilled plots induced ammonium toxicity, which caused a linear reduction in leaf area, shoot dry weight, and root dry weight. Fertilization of amended plots had no effect on shoot growth but reduced mot growth by 54%; thus, amendments ameliorated ammonium toxicity. Between 10 and 28 days after beginning the drought, plants in unfertilized-amended plots maintained higher relative leaf water contents (RLWC) and relative leaf expansion rates (RLER) than plants in unfertilized-tilled plots. Amendment induced nitrogen deficiencies contributed to the increased drought tolerance of plants from unfertilized-amended plots. Since fertilized plants developed symptoms of ammonium toxicity, we were unable to determine if increasing fertility would counteract the drought tolerance conferred by pine bark soil amendments.
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Claims 7
Claim · model-written summary
Fertilization of tilled plots induced ammonium toxicity.
- Taxon
- VIBURNUM PLICATUM VAR. TOMENTOSUM
Viburnum plicatum var. tomentosumt0 - Treatment
- Fertilization of tilled plotse0
- Outcome
- ammonium toxicitye0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Fertilization of tilled plots induced ammonium toxicity”
t0“VIBURNUM PLICATUM VAR. TOMENTOSUM”
Claim · model-written summary
In tilled plots fertilization linearly reduced leaf area, shoot and root dry weight.
- Taxon
- VIBURNUM PLICATUM VAR. TOMENTOSUMViburnum plicatum var. tomentosumt0
- Treatment
- Fertilization of tilled plotse0
- Outcome
- leaf area, shoot dry weight, and root dry weighte0
- Direction
- reductione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Fertilization of tilled plots induced ammonium toxicity, which caused a linear reduction in leaf area, shoot dry weight, and root dry weight.”
t0“VIBURNUM PLICATUM VAR. TOMENTOSUM”
Claim · model-written summary
Fertilization of amended plots did not affect shoot growth.
- Taxon
- VIBURNUM PLICATUM VAR. TOMENTOSUMViburnum plicatum var. tomentosumt0
- Treatment
- Fertilization of amended plotse0
- Outcome
- shoot growthe0
- Direction
- no effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Fertilization of amended plots had no effect on shoot growth”
t0“VIBURNUM PLICATUM VAR. TOMENTOSUM”
Claim · model-written summary
Fertilization of amended plots reduced root growth by 54%.
- Taxon
- VIBURNUM PLICATUM VAR. TOMENTOSUMViburnum plicatum var. tomentosumt0
- Treatment
- Fertilization of amended plotse0
- Outcome
- mot growthe0
- Direction
- reducede0
- Value
- 54%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Fertilization of amended plots had no effect on shoot growth but reduced mot growth by 54%”
t0“VIBURNUM PLICATUM VAR. TOMENTOSUM”
Claim · model-written summary
Unfertilized amended plants maintained higher relative leaf water content than unfertilized tilled plants during drought.
- Taxon
- VIBURNUM PLICATUM VAR. TOMENTOSUMViburnum plicatum var. tomentosumt0
- Treatment
- unfertilized-amended plotse0
- Outcome
- relative leaf water contents (RLWC)e0
- Direction
- highere0
- Comparator
- unfertilized-tilled plotse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“plants in unfertilized-amended plots maintained higher relative leaf water contents (RLWC) and relative leaf expansion rates (RLER) than plants in unfertilized-tilled plots”
t0“VIBURNUM PLICATUM VAR. TOMENTOSUM”
Claim · model-written summary
Unfertilized amended plants maintained higher relative leaf expansion rate than unfertilized tilled plants during drought.
- Taxon
- VIBURNUM PLICATUM VAR. TOMENTOSUMViburnum plicatum var. tomentosumt0
- Treatment
- unfertilized-amended plotse0
- Outcome
- relative leaf expansion rates (RLER)e0
- Direction
- highere0
- Comparator
- unfertilized-tilled plotse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“plants in unfertilized-amended plots maintained higher relative leaf water contents (RLWC) and relative leaf expansion rates (RLER) than plants in unfertilized-tilled plots”
t0“VIBURNUM PLICATUM VAR. TOMENTOSUM”
Claim · model-written summary
Amendment-induced nitrogen deficiency contributed to drought tolerance.
- Taxon
- VIBURNUM PLICATUM VAR. TOMENTOSUMViburnum plicatum var. tomentosumt0
- Outcome
- increased drought tolerancee0
- Qualifier
- Amendment induced nitrogen deficienciese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Amendment induced nitrogen deficiencies contributed to the increased drought tolerance of plants from unfertilized-amended plots.”
t0“VIBURNUM PLICATUM VAR. TOMENTOSUM”
The same questions in other papers
tillage · growth · Viburnum plicatum (Japanese snowball)Positive and negative results
2 in the opposite direction
- positive
- positive
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.