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Rana V.S.,University of Horticulture and Forestry | Basar J.,University of Horticulture and Forestry | Rehalia A.S.,University of Horticulture and Forestry
Acta Horticulturae | Year: 2011

The effects of timing and severity of summer pruning in 22-year-old vines of 'Allison' kiwifruit, trained on a T-bar trellis system, was examined. There were four levels and three dates of summer pruning. Summer pruning was done by heading back of shoots to different levels viz; above 4 nodes level, 6 nodes level and pinching of terminal portion of the bearing shoot. All summer pruning treatments were performed on 3 dates, at complete petal fall,15 days after petal fall and 30 days after petal fall. Summer pruning by pinching the terminal part of the bearing shoots at complete petal fall stage resulted in higher yields with higher proportions of A and B grade fruit. This pruning treatment exhibited highest fruit weight, fruit size, photosynthetic rate, sugars, total soluble solids and titratable acidity. Economic analysis of the different pruning treatments revealed that pinching at petal fall resulted in highest gross returns (Rs)and net benefit (Rs) over control.

Rana V.S.,University of Horticulture and Forestry | Bhardwaj V.,University of Horticulture and Forestry | Rana N.,University of Horticulture and Forestry
Acta Horticulturae | Year: 2011

The investigations were conducted on 23-year-old 'Allison' kiwifruit vines having uniform growth and vigour. The experiment was laid out in Randomized Block Design with ten treatments, comprising of CPPU alone and in combination with GA3 and 2,4-D. The fruits were dipped in these bio-regulators at 2 and 3 weeks after full bloom. Highest fruit yields were achieved with application of 5 ppm CPPU + 60 ppm GA3 + 15 ppm 2,4-D and the lowest fruit yields resulted when fruit were not treated. This treatment also produced the maximum yield of 'A' (>80 g) and 'B' (50-80 g) grade fruit and minimum 'C' (<50 g) grade fruits at both dipping times. Fruit weight and size were also highest with this treatment. Highest total soluble solids (TSS), total sugars and sugar:acid ratios were obtained with this treatment at 2 weeks after full bloom and minimum were recorded in untreated vines. The effect of treatments and harvesting date on the quality parameters exhibited increase of TSS up to the fifth harvest. Titratable acidity declined rapidly up to the fourth harvest and then more slowly. After storage, this treatment also recorded higher TSS and lower titratable acidity.

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