Abstract
Attractive peel colour and quality development in Kinnow (Citrus nobilis Lour x Citrus deliciosa Tenara) is a prime requisite for its fair market price. The objective of study was to find out the impact of canopy position, date of harvesting and nutrition on yield and quality of Kinnow mandarin. A field experiment was conducted in a four year old Kinnow orchard using factorial randomized block design with three replications. There were nine treatments comprised of various N, P, K levels and one control; two canopy positions (external and internal) and three harvesting dates (06.12.13, 26.12.13 and 16.01.14). Statistical analysis using SAS 9.3 software and Tukey's HSD test revealed the significance of various treatments, canopy positions and harvesting dates (P<0.01).The treatment comprising 400g+600g+240g (N+P2O5+K2O/plant) was found the best among other treatments with respect to yield (20.06 kg/tree) and other quality parameters (TSS, acidity, ascorbic acid and total carotenoids). Fruits which are present on external canopy of tree were superior in terms of quality (TSS, ascorbic acid, total carotenoids) as compared to fruits present on internal canopy of the tree.The Kinnow fruits harvested during the last week of December were found superior in terms of total carotenoids in juice and peel and ascorbic acid content. While the fruits harvested in second week of January were found superior in terms of TSS and acidity. Application of 400g, 600g and 240g of NPK respectively was found beneficial for quality fruit production of Kinnow. Quality of Kinnow fruits vary as per canopy position and date of harvesting, hence they should harvest at different times and also from different canopy positions according to purpose.
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