| dc.description.abstract | The present study was carried out at the research farm of Crop Botany and Tea Production
Technology Department at Sylhet Agricultural University, Sylhet during July to December 2013
to study the morphological features and yield of nine sweet potato genotypes to find out the most
suitable ones. Among the genotypes, two were Bangladeshi namely BARI SP-7 and BARI SP-9
and the rest seven were Japanese genotypes viz. JSP-1, JSP-2, JSP-3, JSP-4, JSP-5, JSP-6 and
JSP-7. The experiment was laid out in a Randomized Completely Block Design (RCBD) with
three replications. Data on the morphological and growth studies were recorded at 20 days after
planting (DAP) and yield parameters at final harvest. Results revealed that the morphological
parameters viz. vine length, number of vine plant
, diameter of main vine and yield contributing
characteristics like number, length , diameter, fresh weight, dry weight of storage root, fresh and
dry weight of vine, leaves and yield varied widely among the genotypes. From the observation it
was found that the genotype that showed better results in regard to vegetative growth parameters
their yields were low. The Japanese genotypes were grown vigorously but their production was
poor. In vegetative characteristics BARI SP-9 produced the longest vine length, the highest vine
number plant
-1
1
which was
comparatively lower than that of BARI SP-7. Poor growth in respect of vine length and number
of vine plant
which were 298.7 cm and 6.6 but yield was only 21.25 t ha
-1
-1
was found in JSP-4 (140.7 cm) and JSP-1 (3.06). The genotype JSP-5 produced
fresh weight, dry weight, number and diameter of storage roots plant
were 2140 g, 585.36 g, 5,
3.27 cm, respectively but among the Japanese genotypes JSP-3 had number of vine, length, fresh
weight and yield of storage roots 6.3, 9.67 cm, 2307 g and 19.22 t ha
-1
respectively were which
were comparatively better in terms of growth and yield. Among all the genotypes the maximum
diameter, number, length, and yield of storage root recorded were 3.0 cm, 6.53, 10.8 and 22.83 t
ha
-1
-1
in BARI SP-7. The genotypes BARI SP-7 and JSP-3 were found suitable for their better
growth and yield performance in acidic soils. | en_US |
