Abstract
Abstract Three rose cultivars, Ilona, Mercedes, Sonia, on Rosa multiflora rootstock were grown in a nutrient film technique (NFT) system for 2 years, with root-zone warming (RZW) to 25°C compared with ambient temperature roots. In the 1st season the night air temperatures were 18°, 12°, and no heating (9°); in the 2nd season, 18°, 14°, and 10°. Harvested flowers were graded according to stem length. In the 1st winter seasons RZW increased the proportion of long stemmed roses and increased the total yield, especially in ‘Ilona’. In the 2nd winter season, RZW again increased the proportion of long stemmed roses in ‘Ilona’ but increased the total number of blooms more in the other cultivars. The effects of RZW persisted into the summer period. Prevailing wholesale prices were used to calculate probable gross returns based on yields. Since RZW tended to give longer stemmed roses and more blooms than did ambient conditions, this treatment enhanced returns more than that of the increased air temperature treatments. RZW increased probable returns over the ambient for ‘Ilona’, ‘Mercedes’, and ‘Sonia’ by 49%, 69%, and 78%, respectively.
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Claims 8
Claim · model-written summary
In the first winter, root-zone warming increased the proportion of long-stemmed roses.
Not reportedComparator
Verbatim
e0“In the 1st winter seasons RZW increased the proportion of long stemmed roses”
t0“Roses with Root-zone Warming”
Claim · model-written summary
In the first winter, root-zone warming increased total rose yield, especially in Ilona.
Not reportedComparator
Verbatim
e0“increased the total yield, especially in ‘Ilona’”
t0“Roses with Root-zone Warming”
Claim · model-written summary
In the second winter, root-zone warming increased long-stemmed rose proportion in Ilona.
- Taxon
- Rosest0
- Material
- ‘Ilona’e0
- Treatment
- RZWe0
- Outcome
- proportion of long stemmed rosese0
- Direction
- increasede0
Not reportedComparator
Verbatim
e0“In the 2nd winter season, RZW again increased the proportion of long stemmed roses in ‘Ilona’”
t0“Roses with Root-zone Warming”
Claim · model-written summary
In the second winter, root-zone warming increased bloom numbers more in the other cultivars.
- Taxon
- Rosest0
- Material
- other cultivarse0
- Treatment
- Root-zone Warmingt0
- Outcome
- total number of bloomse0
- Direction
- increasede0
Not reportedComparator
Verbatim
e0“increased the total number of blooms more in the other cultivars”
t0“Roses with Root-zone Warming”
Claim · model-written summary
Root-zone warming effects persisted into summer.
Verbatim
e0“The effects of RZW persisted into the summer period”
t0“Roses with Root-zone Warming”
Claim · model-written summary
Root-zone warming increased probable returns for Ilona by 49% over ambient conditions.
Verbatim
e0“RZW increased probable returns over the ambient for ‘Ilona’, ‘Mercedes’, and ‘Sonia’ by 49%, 69%, and 78%, respectively”
t0“Roses with Root-zone Warming”
Claim · model-written summary
Root-zone warming increased probable returns for Mercedes by 69% over ambient conditions.
Verbatim
e0“RZW increased probable returns over the ambient for ‘Ilona’, ‘Mercedes’, and ‘Sonia’ by 49%, 69%, and 78%, respectively”
t0“Roses with Root-zone Warming”
Claim · model-written summary
Root-zone warming increased probable returns for Sonia by 78% over ambient conditions.
Verbatim
e0“RZW increased probable returns over the ambient for ‘Ilona’, ‘Mercedes’, and ‘Sonia’ by 49%, 69%, and 78%, respectively”
t0“Roses with Root-zone Warming”
The same questions in other papers
heat · yield · RosaPositive and negative results
1 paper in the same direction as this paper · 1 in the opposite direction · 1 reporting no difference from an alternative
- positive
- negative
- no effect
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.