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Effect of Planting Dates on the Yield and Quality of True Seeds of Onion

M.R.A. Mollah*
On farm Research Division, Bangladesh Agricultural Research Institute, Bogra, Bangladesh

M.A. Ali
Department of Plant Pathology, BAU, Mymensingh, Bangladesh

M. Ahmad
Department of Entomology, BAU, Mymensingh, Bangladesh

M.K. Hassan
Department of Horticulture, BAU, Mymensingh, Bangladesh

M.J. Alam
Department of Seed Science & Technology, BAU, Mymensingh, Bangladesh

Abstract/ Executive Summary:

The present study was stimulated by the problem of onion seed production where seed production is possibly only winter period after which rapid increase in temperature as well as early shower adversely affect the quality of seed. To overcome this situation a field experiment was undertaken to find out the optimum planting time for maximizing quality true seeds of onion. The experiment was laid out in a randomized complete block design with four replications. The treatments were five planting dates viz. 1 October, 15 October, 30 October, 15 November and 30 November to achieve the objective. The research work was done at On-Farm Research Division, BARI, Bogra during September, 2010 to June, 2011. The results revealed that the growth parameters, seed yield components, health and quality of harvested seeds were significantly influenced by the different treatments. Results showed that among different planting dates, 15th November was the best for seed and quality.

Keywords: Planting date; Yield; Quality; True seeds

Location: On-Farm Research Division, Bangladesh Agricultural Research Institute (BARI), Bogra during the period of September, 2010 to June 2011.

Start Date: 00-09-2010

End Date: 00-06-2011

Program Area: Crop-Soil-Water Management

Commodity: Onion

Objectives:

The present study was undertaken with the following objective: To determine the appropriate planting date on the yield and quality of true onion seeds.

Methodology:

The experiment was carried out at On-Farm Research Division, Bangladesh Agricultural Research Institute (BARI), Bogra during the period of September, 2010 to June 2011.

Soil and climate: The experimental area is situated at the western part of Bogra district under Level Barind Tract of Agroecological Zone 25 (AEZ-25). The soil is clay loam in texture. The pH value was 5.65. The total rainfall during the cropping season (September-April) was 351 mm. Monsoon started in the month of May and ceased after September. Land preparation: The experimental field was opened with a power tiller at the month of September, 2010. The land was thoroughly prepared by ploughing and cross ploughing followed by laddering. The subsequent operations were done with harrow, spade, hammer etc. The weeds and stubbles were collected and removed from the field. The surface was leveled with a harrower (ladder) driven by a power tiller. The lay-out of the experiment was prepared according to the design of experiment. Design of experiment: The field experiment was laid out in a Randomized Complete Block Design (RCBD) with four replications. The field was divided into four blocks after final land preparation. Each block was divided into five experimental units. The treatments were assigned in each block at random. The size of each unit plot was 1m × 3m. Plant spacing: Row to row and bulb to bulb were 25 cm and 20 cm, respectively. Each plot had four rows. Fifteen seed bulbs were sown in each row. Treatments: Dates of planting were the treatments of the experiments. Five planting dates such as 1 October (T₁), 15 October (T₂), 30 October (T₃), 15 November (T₄) and 30 November (T₅) were tested in the experiment. Variety: BARI Piaj-1 was used in the research program. It was released by Spices Research Centre (SRC) of Bangladesh Agricultural Research Institute (BARI), Bogra, Bangladesh. Application of fertilizer and manure: The crop was fertilized with recommended doses of fertilizers and manure at the rate of 250, 275, 150, 110, 3 and 5 kg/ha Urea, Triple superphosphate (TSP), Muriate of potash (MoP), Gypsum, Zinc oxide and Boric acid, respectively. In addition, cowdung was applied at the rate of 10 t/ha. The entire amount of TSP, Gypsum, Zinc oxide, Boron, one third of Urea and one third of MoP were applied at the time of final land preparation. Rest of the Urea and MoP were applied in three equal installments at 30, 50 and 70 days after planting (DAP). Irrigation and drainage: Water was sprinkled with a watering can after emergence of the shoots at 10 DAP. After word, each plot was irrigated at 30, 50, 70 and 105 DAP to keep the field soil nearly at field capacity. Excess water was drained out properly as and when necessary. Intercultural operations: First weeding was done by hand picking just after 15 days of shoot emergence. The second weeding was done by “Khurpi”(hand weeder) at 35 DAP. Rovral (50 WP) @ 2g/l of water were sprayed at 15 days interval starting from 30 DAP upto 120 DAP. Admire were applied @ 0.5 ml/l of water at 105 and 120 DAP. Staking: Staking of each shoot was made by plastic strips and bamboo sticks. The bamboo sticks were placed in around the plots. About 4-5 cm of each stick was inserted into the soil. The plastic strips were tied between the sticks along the rows of the shoots. Data collection: Data on different growth parameters and yield parameters were collected at different growth stages of the plants.

Source of Information: Int J Appl Sci Biotechnol, Vol 3(1): 67-72 (2015)

Article Link (Online Journal): http://ijasbt.org/vol_3/Mollah_et_al._3.1.pdf

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

Based on the results of the experiment the optimum date of planting of mother bulb for true seed production of onion at Bogra region in Bangladesh is 15th November.

Knowledge Management: Journal