Abstract
Two-year-old Rosa hybrida L. `Royalty', `Emblem', and `Samantha' plants were pinched 20 Oct. and 28 Dec. 1992 for Christmas and Valentine's Day crops. Two greenhouses received ambient CO2 and two were enriched to 1200 ppm CO2 when vents were closed. All temperature set points were 22C/17C day/night. At 10 and 25 days after pinch, and at flowering, 5 shoots from each bench location were destructively sampled for leaf (node) number, stem diameter, stem length, and fresh weights of stem, leaves, and flower bud. Time to visible bud and to flowering from pinch also were recorded.Analysis of variance for the 1992 Christmas crop did not find significant differences for flowering times, but trends in response were evident. The 3 cultivars had mean flowering times of: `Royalty', 51.3 days; `Emblem', 52.3 days; and `Samantha', 54.0 days. Enrichment with CO2 showed a trend for decreased average flowering times for all 3 cultivars. Results from the 1993 Valentine's Day crop will also be presented.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
