EFFECT OF GIRDLING ON YIELD AND QUALITY OF KIWIFRUIT (Actinidia deliciosa Chev.) RAISED THROUGH DIFFERENT PROPAGATION METHODS
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UHF,NAUNI
Abstract
ABSTRACT
The present investigation entitled “Effect of girdling on yield and quality of kiwifruit (Actinidia
deliciosa Chev.) raised through different propagation methods” was carried out during 2019-20 in the
experimental block of Department of Fruit Science, Dr. YS Parmar University of Horticulture and
Forestry, Nauni-Solan, Himachal Pradesh. Ten years old vines of uniform size and vigour, planted at 4.0
m × 6.0 m spacing were selected for the study. The experiment was laid out according to Randomized
Block Design (RBD), comprising of twelve treatment combinations with three replications per treatment.
The experimental plants were raised through three different modes of propagation viz., in situ,
grafting and own rooted (cuttings) which were planted in different sections of experimental
orchard. Four different girdling levels namely; full (100% girdling), 1/2 (50% girdling), 1/4
(25% girdling) and no girdling were applied to the experimental vines.
On the basis of results obtained in the present investigation, it was concluded that the
grafted kiwifruit vines girdled upto 1/4 (25%) trunk girth by removing 2 mm bark in the last
week of March exhibited best performance in terms of improvement in flower and yield
parameters namely; number of flowers per shoot, per cent fruit set, number of fruits per
shoot, total yield and graded yield. Furthermore, the before mentioned treatment also
resulted in better quality parameters like fruit size, fruit weight, total soluble solids, ascorbic
acid, sugars contents and sugar acid ratio. The vines subjected to this treatment also
enhanced the shoot and leaf carbohydrates contents. However, the ungirdled own rooted
vines exhibited highest contents of macronutrients and vegetative growth parameters like
leaf area index and number of shoots per cane.