EFFECT OF CYCOCEL AND ITS METHODS OF APPLICATION ON GROWTH, YIELD, QUALITY AND STORAGE BEHAVIOUR OF ONION (Allium cepa L.) cvs. GOW-1 AND Local White
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Date
2004
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AAU, Anand
Abstract
The field investigation was carried out during rabi season of 2003-04 on sandy loam soil of Horticultural Research Farm at Anand Agricultural University, Anand to study the effect of cycocel and its methods of application on growth, yield, quality and storage behaviour of onion (Allium cepa L.) cvs. Gujarat Onion White-1 (GOW-1) and Local White. The experiment was conducted in Factorial Randomized Block Design comprised of two varieties (GOW-1 and Local White), three concentrations (500, 1,000 and 1,500 ppm) and two application methods (root dipping and foliar spray at 45 DAT) of cycocel. There were two controls without any treatment. Thus, there were fourteen treatments with two checks. The root dipping treatment of seedlings was given at the time of transplanting while, the foliar spraying was given at 45 days after transplanting. The performance of the both varieties was same for all the characters under study except plant height at 30 DAT and dry matter content of onion bulb. The variety Local White had given significantly high plant height at 30 DAT and also it was superior for dry matter content of bulb over GOW-1. The different concentrations of cycocel were failed to induce desired significant effect on parameters viz. plant height, length of leaf, bolting, twin bulb, diameter of bulb, bulb volume and total soluble solids content. The effect of cycocel concentrations were significant in expected direction for number of leaves per plant, weight of ten bulbs, yield and dry matter content of onion bulb. The results indicated that onion crop has attained foil vegetative growth within 90 DAT and later on all vegetative parameters had been declined. The maximum number of leaves per plant (9.40) were recorded with the highest concentration of cycocel (1,500 ppm) at 90 DAT. Similarly, the highest ten bulbs weight (1729.17 g), yield (357.79 q/ha) and dry matter content (15.93 %) were also recorded with 1,500 ppm cycocel concentration. Thus, 1,500 ppm concentration of cycocel was the best for increasing weight and yield of onion bulb. The root dipping method of seedlings before transplanting was significantly effective for reducing plant height (40.38 to 38.88 cm), leaf length (37.28 to 35.93 cm) and increasing number of leaves per plant (4.96 to 5.72 cm) up to 30 DAT. The foliar spraying of cycocel after 45 days from transplanting was significantly effective in desired direction for all the parameters studied. This method had decreased plant height (78.82 to 77.44 cm), leaf length (66.12 to 64.28 cm) and increased number of leaves per plant (8.71 to 9.74 cm) at 90 DAT. Similarly it had effectively decreased bolting (3.67 to 3.16 %), twin bulb (3.28 to 2.11 %). The foliar spraying of cycocel had increased ten bulbs weight (1645.0 to 1757.5 g), equatorial bulb diameter (6.65 to 7.56 cm), polar diameter (6.60 to 7.45 %), volume of bulb (191.72 to 204.36 cm ), neck thickness (1.06 to 1.26 cm), yield (332.47 to 367.81 q/ha), total soluble solids in bulb (13.02 to 13.23 %) and dry matter content of bulb (14.22 to 16.76 %) than the root dipping method. In brief, foliar spraying of cycocel was more effective than the root dipping method of cycocel for yield and its attributes. The overall effect of combined treatment (concentrations and methods of application) against the control were significant for all the vegetative, yield and quality parameters except total loss during storage. The combined treatment had decreased plant height (79.43 to 78.13 cm), leaf length (66.40 to 65.20 cm), bolting (3.93 to 3.41 %), and twin bulb (3.67 to 2.69 %). However, combined treatment had increased leaves per plant (8.17 to 9.23), weight of ten bulbs (1579.17 to 1701.25 g), equatorial diameter (6.29 to 7.11 cm), polar diameter (6.00 to 7.03 cm), volume of bulb (187.75 to 198.04 cm^), neck thickness (0.96 to 1.16 cm), yield (324.89 to 350.14 q/ha), total soluble solids (12.95 to 13.12 %) and dry matter content of bulb (12.70 to 15.49 %). Based on monetary return and CBR cycocel @ 1500 ppm concentration applied as foliar spraying was found the best for both varieties.
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