New Zealand Journal of Crop and Horticultural Science abstracts
Regional variations in the response of kiwifruit vines
to time of cane tipping
P. J. MANSON
W. P. SNELGAR
The Horticulture and Food Research
Institute of New Zealand
Mt Albert Research Centre
Private Bag 92 169
Auckland, New Zealand
Abstract Fruiting canes on kiwifruit vines (Actinidia
deliciosa (A. Chev.) C. F. Liang et A. R. Ferguson `Hayward') were pruned
to length either at the usual time during winter, or much later, during spring.
Pruning of replacement canes during spring is known as late tipping. Previous
studies in Te Puke, the major kiwifruit-growing region of New Zealand, have
shown that late tipping can increase budburst, and therefore the yield, of
kiwifruit vines by between 22 and 39%. In the current work, trials were carried
out in three kiwifruit-growing regions of New Zealand to determine the range of
regional responses to late tipping. When data from this trial were combined
with previously published data we found that changes in the number of flowers
per winter bud (FWB) in response to late tipping were inversely related to the
proportion of budburst (BB) on the canes tipped at the normal time during
winter: increase in FWB(%) = 125-251 x (BB) r2=0.73.
Therefore, late tipping will not increase flower production on vines which are
already destined to have a high budburst. This situation is likely to occur
regularly in climates as cool as southern New Zealand, or northern Italy, but
less frequently in the milder climate of Te Puke, New Zealand.
Keywords kiwifruit; flowering; budburst; pruning;
Actinidia deliciosa
New Zealand Journal of Crop and Horticultural Science, 1995, Vol. 23:
67-71
0114-0671/95/2301-0067 $2.50/0 (c) The Royal Society of New Zealand
1995
PDF file of entire paper: medium quality (375K); (scanned from paper original: notes about this process)
This year's abstracts |
Journal home page |
All abstracts |
Publishing home page
