Journal of Horticultural Sciences

P. P. S. Gill ¹, M. Kumar ¹, N. P. Singh ¹, W. S. Dhillon ²

Affiliations
1 Department of Fruit Science, Punjab Agricultural University, Ludhiana-141004, IN
2 Punjab Horticultural Post Harvest Technology Centre, Ludhiana, IN

Abstract

An investigation was carried out to study the influence of different levels of NPK fertilizers on plant growth, fruit yield and quality, and leaf NPK content in pomegranate cv. Kandhari under sub-tropical conditions. Graded doses of nitrogen (0-300g/plant), phosphorus (0-150g/plant) and potassium (0-300g/plant) fertilizers were applied through soil, in addition to a basal dose of FYM. Control plants were fed FYM only. Maximum increase in plant growth and fruit yield was recorded in plants receiving NPK @ 300:50:100g/plant, while Control plants registered least growth and yield. Potassium levels improved fruit weight over the Control. Higher dose of potassium also improved fruit colour and enhanced peel thickness and grain weight. Maximum TSS:acid ratio was seen with NPK @ 200:50:100g/plant. Reducing sugars were not affected by any treatment. Leaf N, P and K content increased with application of the respective nutrient.

Keywords

Pomegranate, Macronutrients, Growth, Yield, Quality, Leaf Analysis.

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P. P. S. Gill ¹, J. S. Bal ¹

Affiliations
1 Department of Horticulture, Punjab Agricultural University, Ludhiana - 141 004, Punjab, IN

Abstract

The effect of foliar spray of plant growth regulators and nutrients on fruit drop, fruit size and quality was studied in ber cv Sanuar-2 at Krishi Vigyan Kendra, Hoshiarpur, Punjab Agricultural University, Ludhiana, during 2005-2006. Plants were sprayed with NAA (20, 30 or 40 ppm), KNO₃ (0.5, 1.0 or 1.5%) and ZnSO₄

Keywords

Ber, Fruit Drop, Fruit Quality, Plant Growth Regulators, Nutrients.

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S. K. Jawandha ¹, J. S. Randhawa ¹, P. P. S. Gill ¹, Jagjit Singh ¹

Affiliations
1 Department of Horticulture, Punjab Agricultural University, Ludhiana – 141 004, IN

Abstract

An experiment was conducted to study the effect of post-harvest sprays of CaCl₂ (@ 0.5%, 1.0%&2.0%), Ca(NO₃)₂ (@ 0.5%, 1.0%&2.0%), GA₃ (@ 20, 40 and 60 ppm) and Bavistin (0.1%) on storage quality of 'Umran' ber'. Fruits of uniform size were harvested at physiological maturity and treated with various chemicals. Treated fruits were placed in CFB boxes and placed in cold storage (3-5 °C and 85-95% RH). Stored fruits were evaluated at 10, 20 and 30 days from storage for palatability rating, TSS, acidity, Vitamin C and total sugars. After 30 days from storage, the highest palatability rating was recorded in GA₃ (60 ppm) treated fruits, followed by CaCl₂ (2.0%). Both TSS and Total sugars showed a similar trend of increase upto 20 days from storage, followed by a decrease. However, acidity and Vitamin C content of fruits decreased continuously with advancement of storage period. At the end of storage, maximum TSS, total acidity Vitamin C and total sugars were observed in GA₃ (60 ppm) treated fruits, followed by CaCl₂ (2.0%). Studies revealed that GA₃ (60 ppm) treated ber fruits maintained very good quality at 20 days of cold storage.

Keywords

Ber, GA₃, Calcium, Post-Harvest Treatment, Cold Storage.

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