Growth and Yield Response of Sweet Potato Genotypes at Different Harvesting Stage

Abstract

Abstract

An experiment was carried out to characterize seven exotic sweet potato genotypes during two consecutive winter seasons of 2012–2013 and 2013–2014 at the experimental field and laboratory of Department of Horticulture at Sylhet Agricultural University with a view to observe the effect of harvesting stages on growth and yield of sweet potato. The seven sweet potato genotypes viz., SP001, SP002, SP003, SP004, SP005, SP006 and SP007 were evaluated under RCB (Factorial) design to estimate growth and storage root yield at 120 day and 150 day after planting. The result revealed that sweet potato genotypes expressed significant effect on all characters viz. length of vine, root length, root breadth, number of vines hill^-1, foliage weight, number of roots plant^-1 and weight of roots plant^-1. The genotype SP004 produced the highest root yield followed by the genotype SP007. The genotype SP002 produced the lowest yield. All characters except number of roots plant^-1 were significantly affected by harvesting stages and tuber yield 12.77 t ha^-1 was found when the roots were harvested at 150 day after planting (DAP) while it was 9.0 t ha^-1 at 120 DAP. Interaction of genotypes and harvesting stages also exhibited significant effect on all characters except root length and number of roots plant^-1. The results showed that genotype SP001 gave the highest tuber yield (22.66 t ha^-1) followed by the genotype SP007 (17.66 t ha^-1) harvested at 150 DAP. The lowest tuber yield (4.77 t ha^-1) was recorded from the genotype SP002 at the same harvesting stage of 150 DAP.

Keywords: Genotypes, harvesting stage, yield, sweet potato

Cite this Article

Islam M.S., Shimu A.A. Growth and Yield Response of Sweet Potato Genotypes at Different Harvesting Stage. Journal of Crop Science and Technology. 2016; 5(1): 43–49p.