New Zealand Journal of Crop and Horticultural Science abstracts

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Effects of bulb storage, leaf and root pruning, on flower production in Cyrtanthus elatus

G. E. Clark

New Zealand Institute for Crop & Food
Research Limited
Pukekohe Research Centre
49 Cronin Road, RD 1
Pukekohe, New Zealand
email: clarkg@crop.cri.nz

G. K. Burge

New Zealand Institute for Crop & Food
Research Limited
Food Industry Science Centre
Private Bag 11 600
Palmerston North, New Zealand

C. M. Triggs

Department of Statistics
University of Auckland
Private Bag 92 019
Auckland, New Zealand

Abstract  The effects of combinations of duration of bulb storage, storage temperature, and leaf and root pruning regimes before storage on flower production in Cyrtanthus elatus were studied in three experiments. In the first experiment, bulb viability was 93% after 49 days and declined at 98 and 147 days of storage at 1°C to 3%. Storage at 5°C for 147 days did not affect viability but flowering date was delayed 24 days. In subsequent experiments storage at 5°C did not delay flowering after 50 days, but after 100 days flowering was up to 23 days earlier and produced stems 17-22% shorter. Increasing severity of leaf and root pruning reduced the number of flower stems/bulb 46-60%, but did not affect stem length. With storage at 5°C it may be possible to spread the flowering season.

Keywords   cyrtanthus; Cyrtanthus elatus; bulb; storage; temperature; flower production

H03115; Online publication date 13 May 2005 Received 17 December 2003; accepted 19 March 2005
New Zealand Journal of Crop and Horticultural Science, 2005, Vol. 33: 169-175
0014-0671/05/3302-0169 © The Royal Society of New Zealand 2005

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