EFFECT OF MULCH MATERIALS AND PGR ON GROWTH, YIELD AND QUALITY OF PAPAYA (Carica papaya L.)
Loading...
Date
2023
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
Abstract
The present investigation was carried out in the Experimental Farm, Department of Horticulture, Assam Agricultural University Jorhat during the period of 2022-2023 to study the Effect of mulch materials and PGR on growth, yield and quality of Papaya (Carica papaya L.) The experiment was laid out in Factorial Randomized Block design consisting of two factors viz. mulch material and different levels of PGR with two replications where Sinta variety was utilized. The three mulch materials used were M1 (Silver black mulch), M2 (Paddy straw mulch) and M3 (No mulch) with six different levels of PGR were C1 (GA3 @150 ppm), C2 (GA3 @ 200 ppm), C3 (Ethrel @ 150 ppm), C4 (Ethrel @ 200 ppm), C5 (NAA @ 150 ppm) and C6 (NAA @ 200 ppm) which was applied at 45, 90 and 145 days interval. The eighteen treatment combinations were T1 (GA3 @ 150 ppm + Silver black mulch), T2 (GA3 @ 150 ppm + Paddy straw mulch), T3 (GA3 @ 150 ppm + No mulch), T4 (GA3 @ 200 ppm + Silver black mulch), T5 (GA3 @ ppm 200+Paddy straw mulch), T6 (GA3 @ 200 ppm + No mulch), T7 (Ethrel @ 150 ppm + Silver black mulch), T8 (Ethrel @ 150 ppm + Paddy straw mulch), T9 (Ethrel @ 150 ppm +No mulch), T10 (Ethrel @ 200 ppm + Silver black mulch), T11 (Ethrel @ 200 + Paddy straw mulch), T12 (Ethrel @ 200 + No mulch), T13 (NAA @ 150 ppm + Silver black mulch), T14 (NAA @ 150 ppm + Paddy straw mulch), T15 (NAA @ 150 ppm + No mulch), T16 (NAA @ 200 ppm + Silver black mulch), T17 (NAA @ 200 ppm + Paddy straw mulch) and T18 (NAA @ 200 ppm + No mulch).
The treatments had significant influences on the various parameters except few. The plant growth parameters viz., plant height (120.17 cm, 150.67 cm & 172.73 cm at 180, 210 & 240 DAT), flowers per plant (120.57), fruits per plant (30.10) and the fruit yield (122.20 t/ha) in papaya plant treated with C2 were observed to be significantly higher than the other PGR treatments and the lowest plant height (101.07 cm, 131.59 cm & 155.65 cm at 180, 210 & 240 DAT), flowers per plant (106.44), fruits per plant (25.82), fruit yield (85.09 t/ha) were recorded in C3 treated plants. Similarly, among the yield attributing characters the highest value was recorded to be 114.53 (t/ha) in treatment M1 and the lowest yield (82.25 t/ha) was recorded in treatment M3 (No mulch). For biochemical analysis, treatment C4 (Ethrel @200 ppm) showed highest values of TSS (15.26 ◦Brix), total sugar (9.49 %) and reducing sugar (7.26 %) and least for titratable acidity (0.138%) which was followed by C3. The lowest value of TSS (13.31 ◦Brix), total sugar (8.40 %) and reducing sugar (6.58 %) and highest value of titratable acidity (0.161 %) was found in treatment C5. The treatment C2 resulted the highest value of ascorbic acid (64.00 mg/100g) which was at par with C1 and the lowest value of ascorbic acid (61.33 mg/100g) was recorded in treatment C3. Computation of production of economics revealed that the highest B:C ratio (3.37) was found in treatment T4 (GA3 @ 200 +Silver black mulch) followed by T5 (GA3 @ 200+Paddy straw mulch) that is 3.03.