2019, VOLUME 6 ISSUE 3Pages: 424-432
Effect of fertigation of primary nutrients on pomegranate (Punica granatum L.) fruit productivity and quality
Nekha Tanari, Suma Ramegowda*, Anusree Thottan and Manjunatha Girigowda
*Zonal Agricultural Research Station, V.C.Farm, Mandya, Karnataka, India
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The present research work was conducted in 5year-old pomegranate orchard cultivating Bhagwa variety to evaluate the effect of fertigation and soil application of primary nutrient on its fruit yield and quality parameters. The experiment comprised of six treatments with four replications that included application of 100% recommended dose of fertilizer (RDF) through soil application (SA) (T1) and fertigation (F) (T6), supplementing 50% (T2 and T3) and 75% (T4 and T5) of RDF through fertigation following two different nutrient application schedules. In schedule-1, nutrient application rate and time was retained closer to existing soil application recommendation i.e., percent RD N: P2O5: K2O at the rate of 20:20:20 as basal, 50:50:50 at active growth stage and 30:30:30 at rest period. But in schedule-2 nutrient rate at basal and rest application was reduced to 5:15:15 and 20:10:10 percent respectively and relatively higher nutrient rate (75:75:75) was applied during active growth. The result indicated that 75% supplementation of nutrient through fertigation (T5-25% SA + 75% F) following schedule-2 has produce highest fruit yield (18.49 kg plant-1), number of fruits per plant (67.25) and hermaphrodite flowers (128). The fruit quality parameters viz., fruit weight (288.50 g), fruit size, peel weight (98.3 g), aril to peel ration (1.87), aril weight (183.4 g) and aril size and juice quality parameter viz., titrable acidity, ascorbic acid, phenolic content and antioxidant activity in peel and juice was found highest in 100%fertigation (T6). The mineral content of pomegranate juice was in the order of K>N>P>S>Ca>Mg and seed was in the order of N>K>P>Ca>S>Mg and was found in higher concentration in T6 (100% F) than T1 (100% SA). The fertigation schedule-2 was found superior in enhancing pomegranate fruit yield and quality as compared to schedule-1.