M.N.A. Chowdhury
Senior Scientific Officer
Spices Research Center,BARI, Shibganj, Bogra
M. A. R. Akanda
Principal Scientific Officer
Spices Research Center,BARI, Shibganj, Bogra
M. B. Sarkar
Scientific Officer
Spices Research Center,BARI, Shibganj, Bogra
M S. A. Mallik
Director
Spices Research Center,BARI, Shibganj, Bogra
The experiment was conducted during October 2011 to May, 2012 at Spices Research Centre, Shibganj, Bogra to find out an appropriate irrigation schedule and critical irrigation stage for optimum seed production of winter onion. The treatments were viz. T 1= Irrigation 12-15 days up to vegetative stage, T2 = Irrigation at an interval of 12-15 days up to scape initiation stage, T3 = Irrigation at an interval of 12-15 days up to flowering stage, T4 = Irrigation at an interval of 12-15 days up to milking stage, T5 = Irrigation at an interval of 12-15 days up to seed maturity stage, T6 = One Irrigation just after emergence. All parameters like plant height (cm), number of effective stalk per plant, , umbel size (cm) 1000 seed weight (g), seed yield per ha (kg), germination percentage varied significantly except number of flowers per umbel. The highest seed yield (522.92 kg/ha), 1000 seed weight (3.63g) and the germination percentage (78.67%) were found in treatment T5 and the lowest (358.75 Kg/ha, 2.53 g, and 67.33 % respectively) was found in T6. The high yielded treatment (T5) received 280 mm of seasonal water. The highest BCR (4.60) was also found in T5.
IRRIGATION, SEED, PRODUCTION, WINTER ONION
Spices Research Center,BARI, Shibganj, Bogra
Variety and Species
To find out the critical irrigation stage of winter onion for higher yield and quality seed production.
The experiment was conducted at Spices Research Center, Shibganj, Bogra during 2011-2012 The planting materials were BARI Piaz-4. The treatments were;
T 1 = Irrigation at an interval of 12-15 days up to vegetative stage
T2 = Irrigation at an interval of 12-15 days up to scape initiation stage
T3 = Irrigation at an interval of 12-15 days up to flowering stage
T4 = Irrigation at an interval of 12-15 days up to milking stage
T5 = Irrigation at an interval of 12-15 days up to seed maturity stage
T6 = One irrigation just after emergence.
The unit plot size was 4.0m x 3.0m having plant spacing of 25cm x 20cm. The experiment was laid out in Randomized Complete Block Design (RCBD) with three replications. Onion was fertilized with recommended dose of cow dung, N, P, K, S, Zn and B @ 10000, 115, 54, 75, 20, 3 and 2 Kg/ha, respectively. The recorded data were, plant height (cm), number of effective stalk per plant, number of flowers per umbel, umbel size (cm), 1000 seed weight (g), seed yield per plot (g), germination percentage of harvested seed, soil moisture before and after each irrigation, amount of irrigation water applied and BCR. Data were analyzed by MSTAT program. Measured quantity of water was applied for irrigation as per treatment combination by hose pipe system. A common irrigation was applied before planting of bulbs for proper emergence.
Spice Research Report 2011-12, Spice Research Centre, BARI, Shibganj, Bogra
Irrigation up to seed maturity stage is the best option in respect of seed yield and economic performance. The scape initiation and seed maturity stages may be considered as the critical to irrigation for onion seed production.
Report/Proceedings