Vol. 6, Issue 3 (2018)
Evaluation of small onion varieties for their suitability in cauvery delta region in Tamil Nadu
Author(s): Visalakshi M, Porpavai C and Pandiyan M
Abstract: A field experiment was conducted at Soil Water Management and Research Institute, Thanjavur during 2014-16 in randomized block design at two seasons (namely Summer and Kuruvai (kharif)) to select the high yield performing small onion varieties for Cauvery Delta region. Seven small onion varieties were tested with three replications in two seasons. Different varieties include CO (On) 4, CO (On) 5, Arka Bindu, Agri Found Rose, Perambalur Local, Cuddalore Local and Ottanchatram Local. The results revealed that onion varieties varied significantly with season, yield and duration. The variety Perambalur Local showed earliness in sprouting of onion seeds (5.30 days and 4.82 days in summer and kuruvai respectively) and registered highest plant height at peak vegetative, bulb formation and bulb filled stage. The difference between the plant height at vegetative stage and bulb formation stage was higher than the bulb formation and bulb filled stage for all the varieties. Perambalur Local (T5) showed faster growth rate than other varieties followed by Arka Bindu (T3). Also Perambalur Local (T5) registered improved bulb parameters like neck thickness (3.25 cm and 3.67 cm), neck diameter (3.19 cm and 3.47 cm), equatorial diameter (5.18 cm and 5.88 cm), bulb weight (30.93 g and 38.13 g) during summer and Kuruvai season. Yield parameters of small onion varieties indicated that Perambalur Local variety matured first and ready to harvest on 103.80th day after sowing during summer and 96.27th day during Kuruvai and yielded 19.25 t/ha in summer and 21.48 t/ha at kuruvai season. It implies that when compared with the season, Kuruvai registered early maturation than summer while CO (On) 5 (T2) took maximum number of 116.96 days for harvest in both the seasons. Better performance might be due to improved growth and yield parameters by prevailing of conducive climate throughout the cropping period during Kuruvai season. It was concluded from the study that onion variety Perambalur Local followed by Arka Bindu had better performance by registering improved yield characteristics and this may be recommended for commercial cultivation for Cauvery Delta region.
Pages: 3428-3431 | 667 Views 122 Downloads
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How to cite this article:
Visalakshi M, Porpavai C, Pandiyan M. Evaluation of small onion varieties for their suitability in cauvery delta region in Tamil Nadu. Int J Chem Stud 2018;6(3):3428-3431.
