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

Abstract

The present study was stimulated by the problem of onion seed production where seed production is possibly only winter period after whichrapid increase in temperature as well as early shower adversely affect the quality of seed. To overcome this situation a field experiment wasundertaken to find out the optimum planting time for maximizing quality true seeds of onion. The experiment was laid out in a randomizedcomplete block design with four replications. The treatments were five planting dates viz. 1 October, 15 October, 30 October, 15 Novemberand 30 November to achieve the objective. The research work was done at On-Farm Research Division, BARI, Bogra during September, 2010to June, 2011. The results revealed that the growth parameters, seed yield components, health and quality of harvested seeds were significantlyinfluenced by the different treatments. Results showed that among different planting dates, 15th November was the best for seed and quality.DOI: http://dx.doi.org/10.3126/ijasbt.v3i1.11847 Int J Appl Sci Biotechnol, Vol. 3(1): 67-72

Effect of planting time on growth, yield components, seed yield and quality of onion (Allium cepa L.) at Tehuledere district, northeastern Ethiopia

“…Planting time significantly influenced (p ≤ 0.01) number of seeds per umbel which ranged from 47.4 to 533.3 seeds per umbel with an average of 214.0. In the earlier studies, number of seeds per umbel (256.6-515.3) and (93.0-299.9) were reported in Ethiopia (Kobo area) and Bangladesh, respectively [5,8]. However, in the present study, the highest number of seeds per umbel (533.3) was recorded from September 1st planting date.…”

“…In this study, bulbs planted in September were longer and with more number of leaves compared to those planted in November. On the other hand, other study indicated that bulb planted in November was longer and with more number of leaves per plant compared to those planted in October [5]. This could be attributed to climatic variation among the study sites.…”

“…In the same way, September 1st had significantly different with other planting time for number of seeds per umbel, seed yield per plant and seed yield per hectare compared to other planting dates. Similarly, umbel diameter was recorded with a range of 3.0-6.9 cm in Bangladesh [5] and from 4.8 to 6.0 cm in kobo, Ethiopia [8]. The highest umbel diameter recorded from bulb planted in October compared to in November [8] and in November compared to those planted in December and January [6].…”

“…The effect of different planting dates on onion seed production in Bangladesh was done, and October 30th was recommended as the best planting date [4]. Similarly, November 15th identified as the best planting date for onion seed production on Borga region of Bangladesh with a total rain fall of 351 mm [5] and Giza region of Egypt with mean minimum and maximum temperature of 15.60 and 29.8 °C, respectively [6]. In Iran, the best planting dates for onion seed production was from September 22nd to October 6th and from October 21st to November 5th for onion varieties Texas Early Grano 502 and Germez Iranshah, respectively, with mean minimum and maximum temperature of 21.48 and 9.09 °C, respectively [7].…”

The characteristic Performace of Quantitative Flowering Characters and Metabolomic Profile of Shallot (Allium cepa var. aggregatum) Induced by Vernalization

“…Perlakuan vernalisasi juga menunjukkan persen berbunga tanaman yang lebih besar (70.37-79.63%) dibandingkan tanaman yang tidak divernalisasi (29.63%). Sejalan dengan penelitian Mollah et al (2015), bahwa perlakuan tanpa vernalisasi menyebabkan jumlah umbel, diameter umbel bawang menjadi lebih rendah dibandingkan bawang yang diperlakuan dengan vernalisasi 10-15 0 C. Perbedaan stadia tumbuh menyebabkan perbedaan toleransi terhadap lingkungan, sehingga tanaman harus meregulasi proses pertumbuhan dan perkembangannya (Auge et al, 2017). Kemampuan berbunga dipengaruhi berbagai faktor lingkungan dan faktor genetik tanaman (Yang et al, 2016).…”