| dc.description.abstract | The present study was conducted during the period from March 2013 to September 2013 at the
experimental field and laboratory of Horticulture Department, Sylhet Agricultural University, Sylhet. Four
photo insensitive lablab bean genotypes viz., SB002, SB003, SB008 and SB010 were evaluated at three
different sowing dates of 14 March, 1 April and 17 April 2014 with a view to observe pod production
potentiality during summer season under Sylhet conditions. The genotypes were differed in relation to
some physico-morphological characteristics like seed color, hypocotyle color, flower color, pod color, pod
size and shape etc. All the genotypes were found photo insensitive in nature since they flowered properly
during summer season. Days to first flower was ranged from 43 to 50 days only for the all genotypes. The
highest number of pods per plant was recorded from the genotype SB010 (207.7) while it was the lowest
SB008 (112.4). The genotype SB008 had the highest individual pod weight (6.5 g). The highest pod yield
per plant (1.13 kg) was recorded from the genotype SB003 which was followed by the genotype SB010
(1.07 kg/ plant). Date of sowing had significant effect on yield and yield attribute. Maximum number of
pods per plant was recorded from the plants of 1 April sowing (207.0) which was followed by the plants of
14 March sowing (181.2). The highest individual pod weight was recorded from the plants grown from 17
April sowing (5.88 g). Pod yield per plant was the highest for the plants grown from 1 April sowing (1.18
kg) closely followed by 14 March sowing (1.04 kg). The highest green pod yield was recorded from 1 April
(7.92 ton) followed by 14 March sowing (6.94 ton) indicating bright scope of bean production during
summer season. Infestation of pod with pod borer was found for all the sowings (1.76% to 6.23%) while
almost all the plants of 17 April were severely infected with virus (83% to 100%). Significant interaction
was observed between genotypes and time of sowing on yield and yield attributes of lablab bean. The
highest number of pod per plant was harvested from the genotype of SB010 (254.3) when grown from 1
April. The genotype SB003 produced the highest pod yield (10.22 t/ha) raised from 1 April sowing which
was closely followed by the same genotype grown from 14 March sowing (8.93 t/ha). | en_US |
