EFFECT OF LEAF FRUIT RATIO AND GIRDLING ON THE FRUIT YIELD AND QUALITY OF NECTARINE (Prunus persica var. nucipersica) cv. SILVER KING
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Date
2015
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UHF,NAUNI
Abstract
ABSTRACT
The present investigation entitled “Effect of leaf fruit ratio and girdling on the fruit yield and
quality of nectarine (Prunus persica var. nucipersica) cv. Silver King” was carried out in the
experimental orchard of Department of Fruit Science, Dr. Yashwant Singh Parmar University of
Horticulture and Forestry, Nauni-Solan (H.P.) during the year 2014. Eight years old uniform nectarine
plants of cultivar Silver King, raised on wild peach seedling rootstock were selected. The plants were
planted at a spacing of 2 m×3 m and trained according to open centre system. The research trial was
laid out in Randomized Block Design (RBD) with 10 treatments viz., T1 (leaf fruit ratio 20:1), T2 (leaf
fruit ratio 30:1), T3 (leaf fruit ratio 40:1), T4 (leaf fruit ratio 50:1), T5 (girdling half the bark), T6(leaf
fruit ratio 20:1 + girdling half the bark), T7(leaf fruit ratio 30:1 + girdling half the bark), T8(leaf fruit
ratio 40:1 + girdling half the bark), T9(leaf fruit ratio 50:1 + girdling half the bark) and T
10 (control).
The fruit yield decreased linearly with the increase in leaf fruit ratio and lowest yield was recorded
with treatment T9 (leaf fruit ratio 50:1 + girdling half the bark). The highest leaf area, chlorophyll
content and photosynthetic rate were recorded in T
9(leaf fruit ratio 50:1 + girdling half the bark), leaf
nutrients viz., N, P, K, Ca and Mg decreased with increased leaf fruit ratio alone or in combination
with girding. However, the fruit quality characteristics viz., fruit size and fruit weight were recorded
highest in treatment T
8 (leaf fruit ratio 40:1 + girdling half the bark). While, quality in terms of total
soluble solids (TSS), total sugars and sugar acid ratio were recorded highest in treatment T
9followed
by the treatment T
8
. On the other hand, the lowest acidity was recorded in T
9 (leaf fruit ratio 50:1 +
girdling half the bark) followed by T
8 (leaf fruit ratio 40:1 + girdling half the bark). All the leaf fruit
ratio treatments advanced the harvest date by 1 to 4 days compared to control and earliest harvesting
was recorded in treatment T9(leaf fruit ratio 50:1 + girdling half the bark)
. Thus, leaf fruit ratio 40:1
coupled with girdling half the bark followed by leaf fruit ratio 50:1 coupled with girdling half the bark
were found suitable for cv. Silver King under mid hill conditions of Himachal Pradesh (India).
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