Effect of different levels of pruning and chemical substances on growth, yield and quality attributes of guava cv. Allahabad Safeda

Vivek Kumar Tripathi; Jay Yadav; Shiwanand Pandey; Amit Kumar; Riddhima Tripathi

doi:10.56093/ijas.v95i9.164004

Authors

Vivek Kumar Tripathi
Jay Yadav
Shiwanand Pandey
Amit Kumar
Riddhima Tripathi

https://doi.org/10.56093/ijas.v95i9.164004

Keywords:

Guava

Abstract

The evaluate the impact of pruning intensity and chemical applications on growth, yield and quality parameters of guava cv. Allahabad Safeda an experiment was carried out during May-October 2023 and 2024 in the Garden, Department of Fruit Science, C.S.A. University of Agriculture and Technology, Kanpur, India, using randomized block design with ten treatments including one as control viz., three pruning levels (20%, 40% and 60% of shoot) and combinations with calcium nitrate @ 1%, 2% and 3% and potassium nitrate @ 1.5%, 3% and 4.5%. Results revealed significant improvement in growth parameters with T₉-Pruning of 40% shoot+ Ca(NO₃)₂ @ 2.0% having maximum plant height (7.17 m), trunk girth (29.44 cm), shoot length (22.83 cm) and shoot girth (7.87 mm). Flowering and fruit set parameters were also optimized in T₉, with minimum days to flower bud initiation (22.33 days), days to first flower (23.67 days) and flowers drop per shoot (4.05). Treatment T₉ also resulted highest fruit retention per shoot (8.96), fruit width (6.12 cm), fruit length (7.12 cm) and fruit weight (171.18 g). Yield improvements were evident in T₉ with maximum yield per tree (45.34 kg) and per hectare (11.87 t/ha). Biochemical analysis showed superior quality of fruits in T₉ resulted highest TSS (9.93°Brix), lowest acidity (0.16%), highest TSS: acid ratio (68.73), maximum vitamin C (235 mg/100g), highest total sugars (8.63 %) and maximum sugar: acid ratio (59.11). These results highlighted the synergistic effect of pruning and calcium nitrate in enhancing vegetative growth, flowering, fruiting and quality attributes. This integrated approach offers the potential for optimizing guava production under sub-tropical conditions on north India.

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