Influence of time of shading on flowering and yield of kiwifruit vines

Snelgar, W. P.; Manson, P. J.; Martin, Philip

doi:10.1080/00221589.1992.11516273

Cited by 42 publications

(26 citation statements)

References 12 publications

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“…Ferguson 'Hayward' vines reduced fruit size and shoot dry weight in the current season, and reduced shoot survival and flower bud formation the following season (Grant & Ryugo 1984). Snelgar et al (1992a) shaded 'Hayward' vines to 45% of full sun and noted that shading before anthesis did not affect fruit fresh weight, whereas post-anthesis shading reduced fruit weight.…”

Section: Introductionmentioning

confidence: 99%

Influence of time of overhead shading on yield, fruit quality, and subsequent flowering of hardy kiwifruit,Actinidia arguta

Tiyayon

Strik²

2004

New Zealand Journal of Crop and Horticultural Science

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The effect of overhead shading on yield, fruit quality, and subsequent flowering was studied in 4-year-old Actinidia arguta 'Ananasnaya' vines in Oregon, United States in 1998 and 1999. Experimental vines were shaded to 45% of full sun from 14 July to 14 August, 14 July to 10 September (harvest date), or 10 September to 16 November, 1998. Control vines were not shaded. Shading treatments were not repeated in 1999. Fruit fresh and dry weight development followed a similar growth pattern in all treatments. Shading had no effect on yield per vine or fruit fresh weight, length, diameter, and % soluble solids in 1998. Shading for 2 months before harvest significantly reduced fruit dry weight in 1998. Shading in 1998 did not affect percentage of budbreak or the number of buds, shoots, or fruitful shoots per vine in 1999. However, vines that were shaded had a significantly lower percentage of fruitful shoots than unshaded vines, especially vines shaded for 2 months before harvest in 1998. Vines shaded for 2 months before harvest had 48% fewer flowers and thus less yield than unshaded vines. one more cluster per shoot distally (at node 12) than vines shaded for 1 or 2 months before harvest the previous year. There was no treatment effect on fruit fresh weight, dry weight, length, diameter, seed number, or % soluble solids of marketable fruit in 1999. Results show that overhead shading, as might occur with dense canopies, did not have a large impact on fruit quality or yield in the current season, but reduced yield the following season. Overhead shading for 2 months before fruit harvest, led to the greatest reduction in flower number the following season confirming that the period before fruit harvest is an important time for flower bud evocation in this species.

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Section: Introductionmentioning

confidence: 99%

Influence of time of overhead shading on yield, fruit quality, and subsequent flowering of hardy kiwifruit,Actinidia arguta

Tiyayon

Strik²

2004

New Zealand Journal of Crop and Horticultural Science

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“…In contrast, 'shading vines to 45% of full sun for periods of 11-14 weeks in New Zealand reduced the number of flowers/shoot. but not the percentage of flowering shoots (Snelgar et al 1992). …”

Section: Introducfionmentioning

confidence: 99%

Determination of the time of flower evocation in kiwifruit vines

Snelgar

Manson

1992

New Zealand Journal of Crop and Horticultural Science

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“…However, this more consistent model was concerned with plant phenology, which is often considered to be predominantly temperatureregulated. The process we modelled, although strongly influenced by temperature, can also be affected by a number of vine-management factors such as the previous years crop load (Bürge et al 1987), the time that HC is applied (Henzell & Briscoe 1986), the time of winter pruning (Manson et al 1991), the level of solar radiation (Snelgar et al 1992b), and the time of cane growth during the previous summer (Snelgar et al 1992a). In view of this it may be unrealistic to expect a better fit from a model that is based solely on temperature and usage ofHC.…”

Section: Discussionmentioning

confidence: 99%

Modelling flower production of kiwifruit (Actinidia deliciosa) from winter chilling

Snelgar¹,

Hall

McPherson

2008

New Zealand Journal of Crop and Horticultural Science

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In warm areas of New Zealand the productivity of kiwifruit vines (Actinidia deliciosa) can be limited by the low number of flowers produced following a warm winter. Our objective was to formulate a model that quantifies how temperatures, use of hydrogen cyanamide (HC), and orchard location affect flower production of kiwifruit vines. Flowering of kiwifruit vines, and winter temperatures, were monitored in a range of climates in New Zealand for 6 years. Mean winter temperatures for the period May-July ranged from 7.6 to 14.1°C. Over this range the average number of king flowers per winter bud decreased from 2.4 to 0.2 as the temperature increased. Although spraying vines with HC increased the number of king flowers, flower production on treated vines still decreased as the winter temperature increased, in a similar manner to control vines. The number of flowers per winter bud could be modelled using factors for usage of HC, long-term mean annual temperature, and mean winter temperature (r 2 = 0.87). On vines that had not been sprayed with HC, the number of king flowers per winter bud increased by 0.45 for every 1°C decrease in mean winter temperature.

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Influence of time of shading on flowering and yield of kiwifruit vines

Cited by 42 publications

References 12 publications

Influence of time of overhead shading on yield, fruit quality, and subsequent flowering of hardy kiwifruit,Actinidia arguta

Influence of time of overhead shading on yield, fruit quality, and subsequent flowering of hardy kiwifruit,Actinidia arguta

Determination of the time of flower evocation in kiwifruit vines

Modelling flower production of kiwifruit (Actinidia deliciosa) from winter chilling

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