Croploading and Canopy Management

Cooper, Kaleb; Marshall, R.

doi:10.17660/actahortic.1992.297.65

Cited by 9 publications

(12 citation statements)

References 0 publications

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“…A number of factors can influence fruit size in kiwifruit including: pollination (Hopping 1990); crop load on the vine (Lahav et al 1989;Richardson & McAneney 1990;Cooper & Marshall 1991;Snelgar et al 1991); water deficits (Prendergast et al 1987;Judd et al 1989;McAneney et al 1991); leaf area (Cooper & Marshall 1991 ;Tombesi et al 1994); and light (Grant & Ryugo 1984;Morgan et al 1985;Snelgar & Hopkirk 1988;Snelgar et al 1992). Some of these factors can have effects which carry over beyond the season that they occur in.…”

Section: Factors Affecting Fruit Sizementioning

confidence: 99%

“…For example, Cooper & Marshall (1991) found that, for vines carrying similar crop loads, mean fruit weights were c. 20 g less in the 1985/86 season than in either of the 1984/85 or 1986/87 seasons in Hawke's Bay. At least some of this could be driven by changes in the weather.…”

Section: Factors Affecting Fruit Sizementioning

confidence: 99%

“…It has been suggested that fruit growth in the first 40 days after pollination is particularly source-limited (Buwalda & Smith 1990). However, the results quoted could alternatively be interpreted as showing that the low leaf:fruit ratios had a major effect on the subsequent phase of growth (Cooper & Marshall 1991).…”

Section: Shape Of the Growth Curvementioning

confidence: 99%

“…Anything which affects fruit numbers will have an effect on fruit size through a crop loading response (Lahav et al 1989;Richardson & Me Aneney 1990;Cooper & Marshall 1991;Snelgar et al 1991). Conditions during the previous season can be important.…”

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confidence: 99%

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Using early‐season measurements to estimate fruit volume at harvest in kiwifruit

Hall

McPherson

Crawford

et al. 1996

New Zealand Journal of Crop and Horticultural Science

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The results of controlled environment experiments and a field survey covering six major New Zealand kiwifruit (Actinidia deliciosa) growing regions over 3 years showed, surprisingly, that the effect of temperature on the rate of fruit growth is small, at least during the second half of the fruit growth period. The considerable variation in the mean and standard deviation of fruit volume at harvest observed in the field among seasons and sites is therefore not attributable to temperature differences during the fruit-growing season. This raises the possibility that most of the factors affecting fruit growth rates may be established early in the season, so harvest fruit volumes can be predicted from early-season measurements. Mean fruit volumes observed in the field survey ranged from <85 ml (Kerikeri 1987 and Te Puke 1989) to > 130 ml (Kerikeri 1988 proportion of this should be attributed to management practices such as fruit thinning. The fruit growth curves could be described by a two-phase curve, with a reduction in slope 50-60 days after flowering. The initial phase, up to 50 days from flowering, produced growth rates of 1.55 ml/day. The second, slower phase of growth, averaged 0.42 ml/day over the period to harvest. A simple linear regression model was used to predict the mean fruit volume at harvest from measurements of fruit volume made at a given time during the period from 50 to 110 days from flowering (typically mid January and mid March, respectively). The percentage of the variation in mean fruit volume at harvest accounted for by the regression was 75% when based on measurements made 50 days from flowering and rose to nearly 98%, 110 days from flowering. A similar approach was used to predict the standard deviation of fruit volume at harvest. The observed standard deviation at harvest varied from 10 ml to just over 20 ml, which is within the range published by others. The regression of the standard deviation of the fruit volume at harvest on the standard deviation of fruit volume earlier in the season accounted for more than 80% of the observed variation from 50 days after flowering onwards.

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Section: Factors Affecting Fruit Sizementioning

confidence: 99%

Section: Factors Affecting Fruit Sizementioning

confidence: 99%

Section: Shape Of the Growth Curvementioning

confidence: 99%

mentioning

confidence: 99%

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Using early‐season measurements to estimate fruit volume at harvest in kiwifruit

Hall

McPherson

Crawford

et al. 1996

New Zealand Journal of Crop and Horticultural Science

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“…However, treated vines had 2-6 fewer canes than untreated vines. Export yield is directly related to cropload, winter buds or canes laid down (Cooper & Marshall 1992). If adjustments for cane numbers are made the loss reduces to 17%.…”

Section: Kerikerimentioning

confidence: 99%