The Effects of Spent Flower Removal on Reblooming and Branching Architecture and the Characterization of Floral Heat Tolerance of Garden Roses
Notice bibliographique
Résumé
Spent flower removal is commonly practiced on remontant garden roses as a landscape management tool to hasten rebloom. To study the effects of spent flower removal on the reblooming and branching architecture of garden roses, four Shrub rose cultivars were established in the field in February 2019 and treatments were started in June 2019 at Somerville and Overton with the same treatments and controls in each cultivar. Spent flower removal had no effect on the days to rebloom between flushes of flowering. ‘Belinda’s Dream’ had the longest reblooming period. The current season growth and primary shoot number were not affected by spent flower removal. Plants in Somerville exhibited a higher number of secondary and tertiary shoots than in Overton regardless of cultivar and more quaternary shoots on some cultivars than those in Overton. This is likely attributable to the longer growing season in Somerville than in Overton.\n \nAn important aspect of heat tolerance of ornamental plants is the response of the flowers to high temperature. Commercial garden rose cultivars with buds 4 mm in diameter were exposed to temperatures of 36, 40, or 44 ˚C for durations of 1, 3, or 5 h in factorial combination in a heat chamber and compared to untreated controls to determine the effects of heat on floral parameters including petal number, flower diameter and flower dry weight when flowers were fully open. The number of treatments different from the control determined using Dunnett’s test and the parameters affected by the temperature × duration factors as determined by ANOVA were used to categorize the cultivars studied.\n\nDry weight was the most sensitive parameter measured. ‘CHEwnicebell’ and ‘ZLEMarianne Yoshida’ were categorized as Heat Sensitive cultivars, ‘Winnipeg Parks’ was categorized as Moderately Heat Susceptible. ‘Morden Blush’, ‘Meipeporia’ and ‘RADrazz’ was considered as Moderately Heat Tolerant cultivars. ‘RADtko’ and ‘RIPhud’ were not affected by the heat treatments and were categorized as Heat Tolerant cultivars. Exposure of plants with buds 4 mm in diameter to 44 ˚C for 3 or 5h was the most effective treatment for determining floral heat tolerance for the cultivars studied.
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Comment cette classification a été obtenuedéplier
Prédiction distillée sur la base complète
Imitation des enseignantsNi prévalence calibrée, ni vérité terrain. Validation humaine à venir. Apprise à partir de 10 348 étiquettes directes de Codex et de 10 348 étiquettes directes de Gemma. Le mode candidate est l'union des têtes enseignantes seuillées; le consensus est leur intersection. Ces sorties portent le statut machine_predicted_unvalidated et ne sont ni des étiquettes humaines ni des étiquettes directes de modèles de pointe.
Scores Codex et Gemma par catégorie
| Catégorie | Codex | Gemma |
|---|---|---|
| Métarecherche | 0,000 | 0,000 |
| Méta-épidémiologie (sens strict) | 0,000 | 0,000 |
| Méta-épidémiologie (sens large) | 0,000 | 0,000 |
| Bibliométrie | 0,000 | 0,000 |
| Études des sciences et des technologies | 0,000 | 0,000 |
| Communication savante | 0,000 | 0,000 |
| Science ouverte | 0,000 | 0,000 |
| Intégrité de la recherche | 0,000 | 0,000 |
| Charge utile insuffisante (le modèle a refusé de juger) | 0,000 | 0,000 |
Scores machine (provisoires)
Les deux têtes enseignantes du modèle étudiant, lues sur ce travail. Un score ordonne la base pour la relecture; il n'affirme jamais une catégorie, et le statut de validation accompagne chaque rangée tel quel.
Scores de référence d'un modèle non mature (critères de maturité non atteints, 7 itérations). Un score ordonne; il n'affirme jamais une catégorie.
score_only:v0-immature-baseline · tel quel depuis la passe de notation : score_only signifie que le nombre peut ordonner les travaux, et qu'aucune étiquette de catégorie n'en découleClassification
machine, non validéePrédiction automatique; un appel candidat d’une seule tête enseignante, pas un consensus.
Le détail, modèle par modèle et score par score, se trouve en fin de page sous « Comment cette classification a été obtenue ».