New Zealand Journal of Crop and Horticultural Science abstracts
Wood age and floral bud distribution on four nashi (Pyrus serotina)
cultivars grown on pergola, Y-frame, and centre-leader
training systems in the Waikato region of New Zealand
D. J. KLINAC
B. GEDDES
S. WRIGHT
The Horticulture and Food Research Institute
of New Zealand
Ruakura Research Centre
Private Bag 3123
Hamilton, New Zealand
Abstract The influence of wood age on floral bud distribution
was investigated on the nashi (
Pyrus serotina Rehder var.
culta
Rehder) cultivars `Hosui', `Kosui', `Nijisseiki', and `Shinsui' at 3, 6, and 9
years of age. Comparisons were made between each cultivar grown on either
pergola, Y-frame, or centre-leader training systems. Floral bud numbers were
noted for both spur and lateral sites, and at shoot tips. In all cultivars,
most floral buds were produced on young wood. This was especially marked for
the lateral-bearing cultivars `Hosui', `Kosui', and `Shinsui'. Bud development
on `Nijisseiki' was more evenly distributed over all wood ages, with a
significantly higher proportion of spurs. Spur production was lowest in
`Kosui'. Tree growth was most vigorous on Y-frame and least vigorous on pergola
systems, but training systems did not consistently affect the mix of wood ages
or bud development. All cultivar/training system combinations showed a changing
pattern of wood age and floral bud distribution over time. From 6-9 years of
age the proportion of 1-2-year-old wood declined especially rapidly on `Hosui'
and `Kosui', placing increased reliance on bud development from older wood and
on spurs.
Keywords nashi; Asian pear; Pyrus serotina; floral
buds; growth form; training systems
New Zealand Journal of Crop and Horticultural Science, 1995, Vol. 23:
191-197
0114-0671/95/2302--0191 $2.50/0 (c) The Royal Society of New Zealand
1995
PDF file of entire paper: medium quality (450K); (scanned from paper original: notes about this process)
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