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Influence on Planting Dates on Yield and Quality of True Seeds of Onion

Chief Scientific Officer & Head, OFRD and Relevant Scientists of OFRD

Abstract/ Executive Summary:

A field experiment was undertaken to find out the optimum planting time for maximizing true seeds of onion. The experiment was set at the MLT site, Joybpurhat during October 2014 to April 2015 in a randomized complete block design with four replications. The treatments were three planting dates viz. 30 October, 10 November and 20 November. Among different planting dates, 10th November was found to be the best for true seed production of onion in Joypurhat region.

Keywords: Onion, Planting date, Yield, Quality

Location: Joypurhat, BARI, Bogra

Start Date: 00-10-2014

End Date: 00-04-2015

Program Area: Crop-Soil-Water Management

Commodity: Onion

Objectives:

To determine the appropriate planting date for higher yield and quality onion seeds.

Methodology:

The experiment was carried out in Multilocation Testing Site (MLT), Joypurhat, BARI, Bogra during October, 2014 to April, 2015. The experimental area falls under Level Barind Tract of AEZ-25. 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 three experimental units. The treatments were assigned in each block at random. The size of each unit plot was 1m × 3m. Block to block and plot to plot distance were 100 cm and 50 cm, respectively. 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. Three planting dates such as 30 October (T₁), 10 November (T₂) and 20 November (T₃) were tested in the experiment. BARI Piaj-1 was used as test crop. The crop was fertilized with recommended doses of fertilizers and manure at the rate of 152, 100, 180, 20, 3.60 and 1.70 kgha-1NPKSZn and B, respectively (Anonymous, 2014). In addition, Cowdung was applied at the rate of 10 tha^-1. The entire amount of Phosphorus, Gypsum, Zinc, Boron, one third of Nitrogen and one third of Potash were applied at the time of final land preparation. Rest of the Nitrogen and Potash were applied in three equal installments at 30, 50 and 70 days after planting (DAP). 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. First weeding was done by hand picking just after 15 days of shoot emergence. The second weeding was done at 35 DAP. Rovral (50 WP) @ 2g l^-1 of water were sprayed at 15 days interval starting from 30 DAP upto 120 DAP. Admire were applied @ 0.5 ml l^-1 of water at 105 and 120 DAP. 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 on different growth parameters and yield parameters were collected at different growth stages of the plants (duration of crop for seed production is 145 to 150 days). When the seeds inside the capsules become black and 25-30% black seeds were exposed on the umbel, then each umbel was cut with 5-7 cm flower stalk. Harvesting was continued for 3-7 days. The umbels were sun dried. Threshing was done by light beating and hand rubbing of the umbels. The seeds were cleaned and sun dried for 3-4 days until seed moisture reduced to below 8%. The data collected on various parameters related to the experiments were subjected to statistical analysis according to the design of experiment by MSTAT computer package program.

Source of Information: Annual Research Report 2014-2015, On- Farm Research Division, BARI, Gazipur

Article Link (Online Journal):

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 Joypurhat region was found to be 10 November.

Knowledge Management: Report/Proceedings