Evaluation of Different Vaireties of Onion and their Transplanting Times for Off-season Production in Mid Hills of Nepal

Abstract

A field experiment was conducted at the agro-ecological research site (AER site) of the RegionalAgriculture Regional Station, Lumle, at Deurali in Palpa (1200 masl) during rainy season of2004 and 2005. The main objective of the experiment was to evaluate the different varieties ofonion and their transplanting time for off-season production in mid hill conditions. Treatmentswere four onion varieties, namely LR-241, N-53, Nasik Red and Red Creole and four transplantingdates as 25 July, 5 August, 15 August, and 25 August. The trial was conducted in RCBD withfactorial arrangement of treatments and replicated three times considering farmer as a replication.The plot size was maintained 1.4 m2 (1.4 x 1 m2). Observation was recorded on plant height, plantstand at maturity, diameter and length of bulbs, neck thickness and yield of green bulbs and greentops. The varieties showed a significant different only on the fresh bulb production. Transplantingdates showed a significant difference on the plant height, plant stand at maturity and marketablebulb production. The highest fresh bulb yield (16.63 t ha-1) observed on the variety N-53. Similarly,August 15 transplanting date produced the highest bulb yield (15.31 t ha-1) among four transplantingdates. This novel technology for off-season onion bulb production through seedlings would be goodopportunity for increasing the income of many hill farmers which have no access to low land andirrigation facility during normal onion production season. The production of green tops in this periodis consumable and easily saleable in the local market. So farmers get extra income from thistechnology.Key words: Bulb yield; off-season onion; transplanting date; varietiesDOI: 10.3126/narj.v7i0.1862Nepal Agriculture Research Journal Vol.7 2006 pp.21-26

Performance Evaluation of Aggregatum Onion Genotypes (Allium cepa Var. Aggregatum) for Yield, Quality and Resistance Characters

“…The highest mean polar diameter (39.52 mm) was found on Puttarasal local and lowest (13.47 mm) was found on Nayagarh local 01. These results are in agreement with the results of the study conducted by Gautam et al, (2006) and Azoom et al, (2014). The lowest average equatorial diameter of 20.63 mm was recorded in Coimbatore Local White (Aca1) and highest equatorial diameter of 42.06 mm was found on Aca 15 (Puttarsal local).…”

Response of Onion (Allium cepa L.) to nitrogen fertilizer rates and spacing under rain fed condition at Tahtay Koraro, Ethiopia

“…Neck diameter (thickness) in onion is an important character, because it indicates bulb storage ability. The onion with thin neck diameter, store better than thick diameter 32 . The increase in neck diameter might show its involvement in the synthesis of amino acids, as they link together and form proteins and make up metabolic processes required for plant growth including neck thickening.…”

Effect of transplanting date and reduced doses of oxyfluorfen herbicide on weed control, yield and quality of onion (Allium cepaL.) in south of Iran

“…Neck thickness is an important trait of bulb quality in onion due to its effect on bulb storage ability. The onion with thin neck diameter stores better than one with thick diameter (Gautam et al, 2006). All the weed control treatments resulted in significantly higher bulb TSS than the weedy check.…”

“…Moreover the produced bulbs at this date had the highest neck thickness (Table 5). Gautam et al (2006) reported that there were no significant differences for length and diameter of onion bulbs at different planting dates in summer. In this study, the highest percentage of bulb TSS was observed at last date of transplanting (Table 5).…”