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Plant Science Today (PST)

Research Articles

Vol. 12 No. sp4 (2025): Recent Advances in Agriculture by Young Minds - III

Effect of plant spacing and flower inducing chemicals on yield, yield attributing characters and fruit quality of mango cv. Amrapali

DOI
https://doi.org/10.14719/pst.7868
Submitted
21 February 2025
Published
31-10-2025

Abstract

Yield and yield attributing factors are of special significance in establishing high and ultra high-density planting of perennial fruit trees. Flowering and fruiting of individual mango trees under high density planting is comparatively low. Among the various strategies developed, the application of paclobutrazol and potassium nitrate has proven effective not only in inducing flowering but also in promoting early and offseason flowering in mango. A field experiment was conducted to study the effect of paclobutrazol (PBZ) and potassium nitrate (KNO3) on yield and yield-attributing parameters and fruit quality of mango (Mangifera indica L.) cv. Amrapali grown under different plant spacings at the Horticultural Research Station, OUAT, Bhubaneswar during 2018-19 and 2019-20. The experiment was laid out in a Factorial Randomized Block Design with 12 treatment combinations and 3 replications. The treatment combinations consisted of two levels of spacings (2.0 x 2.0 m and 4.0 x 2.0 m) and six levels of chemical treatments (Paclobutrazol @ 0.25, 0.50 and 0.75 g a.i. per meter of canopy spread, and KNO3 @ 2 % and 4 %), along with a control (water application). The results revealed that the plants spaced at 4.0 x 2.0 m and treated with paclobutrazol @ 0.50 g a.i./ m of canopy spread recorded the highest yield (8.79 kg/ tree). Application of KNO3 @ 4 % increased fruit length by 3.60 %, fruit breadth by 1.41 %, fruit weight by 3.71 %, pulp weight by 4.75 %, stone weight by 1.19 %, pulp to peel ratio by 3.77 % and pulp to stone ratio by 3.41 % compared to the control. Fruit quality parameters were significantly influenced by the plant spacing. Maximum total soluble solids (TSS), TSS: acid ratio, reducing sugar, and total sugar, along with lower titratable acidity were recorded in plants spaced at 4.0 x 2.0 m.

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