Effects of production and postproduction factors on longevity and quality of kalanchoe.
Leonard, R. T.; Nell, T. A.;
Acta Horticulturae Year: 2000 Issue: No. 518 Pages: 121-124 Ref: 7 ref.
2000
บทคัดย่อ
In trials with Kalanchoe blossfeldiana pot plants, fertilizer rates of 150, 300, 450 and 600 mg N/litre had no effect on days to flowering, growth or quality. Plants lasted 4 days longer when fertilized with 150 mg N/litre compared to 600 mg N/litre. Terminating fertilizer application 4 weeks prior to flowering did not affect growth, quality or longevity. Stage of bud development at marketability showed that plants shipped with 1 to 3 florets open lasted 12 days longer than those shipped with 75% florets open and 5 days longer than plants shipped with 25% florets open. Buds continued to open in the postproduction environment at all marketable stages. Response to simulated transport at 4, 13 and 21 deg C for 3, 6 or 9 days was cultivar dependent. The cultivar Kiebessy was not influenced by transport conditions while the longevity of Michelle was reduced by one week when transported for 9 days. Leaf quality was maintained on both cultivars at all transport conditions. Postproduction light and temp
erature had a significant effect on longevity. Longevity increased by up to 19 days when maintained at 18 deg C compared to 24 deg C. Longevity of Kiebessy at 18, 21 and 24 deg C averaged 58, 45 and 39 days, respectively, and 49, 37 and 32 days, respectively, for Michelle. Plants lasted 8 days longer at 20 micro mol m-2 s-1 compared to 10 micro mol m-2 s-1. All 27 cultivars evaluated had excellent quality and longevity. Buds continued to open and full flowering was achieved on all cultivars. Longevity ranged from 39 days for cultivars Debbie and Goldstrike to 66 days for Nathalie.