"EFFECT OF DIFFERENT MULCHES ON YIELD, QUALITY AND STORAGE OF ONION BULBS IN KHARIF SEASON (CV. PHULE SAMARTH)"

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Date
2006-05-31
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MAHATMA PHULE KRISHI VIDYAPEETH, RAHURI - 413 722, DIST. AHMEDNAGAR (M.S.) INDIA
Abstract
The present investigation was conducted at 'Scheme for Research on Onion storage', Department of Horticulture, M.P.K.V., Rahuri during year 2005-06 on newly recommended onion cv. Phule Samarth. The experiment was laid out in Randomized Block Design with 4 replications consisting of 7 treatments, viz., Black polyethylene sheet mulch, white polyethylene sheet mulch, black polyethylene strip mulch, white polyethylene strip mulch, wheat straw mulch, sugarcane trash mulch and control. The results indicated that the maximum plant height was reported in sugarcane trash mulch (68.7 cm) which was at par with black polyethylene sheet mulch (67.42 cm). Maximum number of leaves were observed in black polyethylene sheet mulch (10.65) while the lowest plant height and number of leaves were reported in control. Minimum premature bolting was recorded in control (1.87%),while maximum premature bolting was observed in black polyethylene sheet mulch (4.95 %) and sugarcane trash mulch (4.87 %). Maturity of onion crop was prolonged due to black polyethylene sheet mulch (117.25 days),while early maturity was reported in control (87 days). The lowest neck thickness (0.95 cm), the lowest equatorial diameter (4.82 cm) and the lowest polar diameter (5.15 cm) was observed in control plot. The highest neck thickness (1.16 cm) and the highest polar diameter (5.91 cm) was reported in black polyethylene sheet mulch, while highest equatorial diameter (6.55 cm) was reported in sugarcane trash mulch. The highest marketable bulb yield (28.69 t/ha) and total bulb yield (33.45 t/ha) was reported in sugarcane trash mulch which was at par with black polyethylene sheet mulch. Biochemical parameters,except T.S.S. of onion bulbs were not influenced due to various mulches. The highest T.S.S. was recorded in black polyethylene sheet mulch. PLW losses and rotting losses were not affected significantly due to different mulches. Minimum sprouting losses were recorded in white polyethylene strip mulch (1.44%) and the highest in white polyethylene sheet mulch (6.56 %). The lowest total losses (14.87 %) were recorded in control which was at par with sugarcane trash mulch (15.62 %), while maximum total losses (21.75 %) were recorded in black polyethylene sheet mulch. Nutrient status of soil was not influenced significantly due to various mulches. The soil temperature was significantly increased under black polyethylene sheet mulch (38.93°C) than control (35.91°C). Weed intensity was effectively decreased in black polyethylene sheet mulch while white polyethylene sheet mulch failed to control weeds. The highest net profit (Rs. 1,34,735 / ha) and the highest Cost: benefit ratio (6.63 ) was obtained in sugarcane trash mulch, while the lowest net protit (Rs. 70135 / ha) and the lowest Cost: benefit ratio (1.16) was recorded in white polyethylene sheet mulch.
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