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Articles by S.U. Ahmed
Total Records ( 14 ) for S.U. Ahmed
  F. Ahmed , M.S. Rahman , S.U. Ahmed and M.Y. Miah
  An investigation was made on the performance of 144 unsexed Van Cobb broiler chicks from 21 days to 42 days of age. The chicks were fed on soybean meal (SM) based iso-nitrogenous and iso-energetic diet incorporating phytase with the levels of 0.0, 0.50, 1.00 and 1.50 g/kg diet for better utilization of the basal diet. The growth rate, feed intake, feed consumption, dressing yield and profitability increased as the level of phytase supplementation increased and the level of phytase had no effect on survivability. The addition of phytase seemed to be effective to overcome the antinutritive effect of phytate phosphorus and non-starch polysaccharides (NSP) on broiler performance. Therefore, it was concluded that 1.50 g/kg phytase may be incorporated in SM based broiler diet for profitable production.
  S.M.L. Kabir , M.M. Rahman , M.B. Rahman , M.M. Rahman and S.U. Ahmed
  The research work was conducted on "Hubbard Isa Starbro" broilers to evaluate the dynamics of probiotics relating to live weight gain, carcass yield, weight of cut up meat parts and immune response. Day old broiler chicks were divided into four groups as group A (Vaccinated probiotics fed group), B (Nonvaccinated probiotics fed group), C (Vaccinated conventional fed group) and D (Nonvaccinated conventional fed group). Groups C and D were taken as control birds fed with commercial ration and groups A and B as experimental birds were fed with commercial ration with the addition of 2gm probiotics (Protexin® Boost)/10 litres drinking water upto 6th week of age. The result evidenced the following information: (a) The live weight gains obtained were significantly (p<0.01) higher in experimental birds as compared to control ones at all levels during the period of 2nd, 4th, 5th and 6th weeks of age, both in vaccinated and nonvaccinated birds. (b) A significantly (p<0.01) higher carcass yield occurred in broiler chicks fed with the probiotics on the 2nd, 4th and 6th week of age both in vaccinated and nonvaccinated birds. The weight of leg was found significantly (p<0.01) greater for experimental birds as compared to control ones on the 2nd, 4th and 6th week of age. A significantly (p<0.01) higher breast weight in broiler chicks fed with the probiotics was observed on the 4th and 6th week of age. Analogously a significantly (p<0.05) higher breast portion weight was found in experimental birds as compared to control ones during 2nd week of age. (c) The antibody production was found significantly (p<0.01) higher in experimental birds as compared to control ones. Significant differences were also observed in the weight of spleen and bursa due to probiotics supplementation. The results of the study thus revealed that probiotics supplementation promoted significant influence on live weight gain, high carcass yield, prominent cut up meat parts and immune response.
  P.K. Sarker , S.U. Ahmed , S. Rahman and D. Dey
  Present study deals with the suitability and production potential of two exotic fish species (GIFT: Genetically Improved Farm Tilapia; O. niloticus, C. carpio) as mono culture and mixed culture system of integrating a short term (mid August-mid December) brackish water aquaculture in the south-west coastal paddy fields of monocropped coastal saline soil at high rain fed region during monsoon season. Twelve paddy plots size ranged from 1320-2080 m2 with peipheral trenches (40 cm depth and 45 cm width) and one meter deep ditch in 3% of the area were stocked with fish at a density of 5928 ha-1 for mono and mixed culture (50+50%), after 105 days of rearing average weight and production rate of fish from monoculture of GIFT (T1), mixed culture of GIFT and C.carpio (T2) and monoculture of C. carpio were found 112.5 g, 479.36 kg; (114.2+110.6 g); (241.68+185.21 kg); 114.03 g, 398.95 kg ha-1, respectively. Higher significant production was found in case of GIFT monoculture in T1 than that of other treatments. Highest net return was obtained from T1 while lowest net return from rice monoculture crop farming in T4. So, rice fish farming was economically more rewarding than the rice mono-crop farming. Besides, GIFT monoculture plays a significant production potential for coastal paddy fields.
  M.S. Islam , M.M. Islam and S.U. Ahmed
  The study was carried out in the Meghna river-estuaries of Bhola district from January, 1996 to December, 1997 with a view of quantify the extent of damage of shell and fin-fish larvae during collection of P. monodon larvae as target species. Study revealed that during collection of each Penaeus monodon (Fab.) post larva (PL), about 26 and 17 larvae of other shrimp, 16 and 7 fin-fishes and 90 and 39 macrozooplankters respectively were ruthlessly destroyed during the consequent years. During the study period, about 1.10 and 0.89 million man days/yea respectively were found to involve in shrimp fry collection. It was also recorded that about 11.0 and 8.2 million of P. monodon PLs respectively were harvested in 1996 and 1997 from the study area. The study indicates that indiscriminate killing of shell and fin-fishes and other valuable aquatic organisms during collection of P. monodon PL by shrimp seed collectors is causing threat to aquatic biodiversity conservation and ecology of coastal waters.
  M.K. Islam , M.A. Awal , S.U. Ahmed and M.A. Baten
  Influence of two set sizes viz. 1.6 and 2.44g/set, three plant spacings viz. 20cm 10cm, 20cm 15cm and 20cm 20 cm and four doses of N viz. 0, 60,120 and 180 kg/ha on the growth and bulb yield of onion was studied. Larger set produced the highest bulb yield (22.6t/ha) over smaller one (19.9 t/ha) . Smaller set gave more number of single bulbs and took shorter growing period. The closest spacing produced the maximum number of single bulbs (31.6%) and the highest bulb yield (23.7 t/ha). N at zero level gave the highest number of single bulbs. N at 120 kg/ha produced the maximum bulb yield (28.5 t/ha), but N at 180 kg/ha gave the highest plant height and required the longest growing period. Interaction effects of all possible combinations caused significant variation on bulb yield and related components. Larger set with the closest spacing gave the highest bulb yield (25.6 t/ha). Smaller set with nitrogen at zero level produced the maximum number of single bulbs. The closest spacing with 120 N/ha gave the highest bulb yield (31.6 t/ha). Maximum bulb yield (33.7 t/ha) was recorded from the combination of larger set closest spacing 120 kg N/ha. Smaller set closest spacing zero level N produced the highest number of single bulbs.
  S.U. Ahmed , M.S. Rahman and M.S.A. Khan
  A study was undertaken to find out the effect of fertlization on the fatty acid profile of Artemia cysts (GSL strain, Utah, USA origin) produced from the modified traditional solar salt works of Bangladesh during winter months (January-March) through different fertilization treatments (T1,T2,T3). Application of fertilizer for T1 was 50 kg urea + 20 kg TSP/ha, T2 was 500 kg dried and powdered chicken manure/ha and T3 was 1000 kg dried and powdered chicken manure/ha with dress up weekly/bi-weekly fertilization in all the cases. Palmitic, Linolenic, Eicosapantaenonic and Docohexaenoic acids (mg/g.DW) were found highest for the cysts in T1 (16.0±1.36%), T2 (14.7±0.47%), T2 (4.7±0.40%) and T2 (0.7±0.06%) treatments, respectively. High amount of 18:3(n-3) acids in the cysts of all sources proves to be freshwater type of the cysts. The presence of marine type essential fatty acids in the cysts of all sources were found low for 20:5n-3 (3.7-4.7%) and very low for 22:6n-3 (0.09-0.7%). No significant variation was observed for 16:0 acids within the treatments, but for 18:3(n-3) acid, the variation was found highly significant (P= 0.0052) between T2 and T3. For 20:5(n-3), only variation between T2 and T3 was found insignificant (P=0.1161), but between other treatments, significant variation was observed between T2 and T3 (P=0.0241), T2 and T3 (P=0.0022) and T1 andT3 (P=0.0161).
  M.R. Saha , M.M. Rahman , S.U. Ahmed , S. Rahman and H.K. Pal
  A study was undertaken to evaluate the effect of stocking density on brood stock development of mud crab (Scylla serrata) in brackishwater earthen ponds. Four stocking densities such as 6000/ha (T1); 8000/ha (T2); 10000/ha (T3) and 12000/ha (T4) were tested and the crabs were allowed to fed with 50% slaughterhouse + 25 per cent tilapia (Oriochromis niloticus) + 25% soft shrimp head. In terms of survival rate (both male and female) the stocking density having 6000/ha showed the best performance. For female crab significant lower survival (P<0.05) was observed for T3 & T4 compare to T1 & T2. But for final growth and carapace width, an insignificant variation was noted among the treatments. However, in case of T1 and T2, 2.5-3.0 per cent of females were found to became berried showing significant variation with other two treatments proved that high stocking has inverse effect on brood development.
  S.U. Ahmed , M.S.Ali , M.S. Islam and P.K. Roy
  A three and half month study was undertaken to evaluate the effect of culture management and stocking density on the growth and survival of Penaeus monodon in semi-intensive system of farming. Three treatments with stocking densities of 20 PL/m2 25 Pl/m2 and 30 PL/m2 were applied and considered as treatment T1, T2 and T3, respectively. All the ponds were supplied with commercial pelleted feed of different grades and amount (ranging from 10 to 2.8 per cent of total biomass weight) based on the age and growth of shrimp. A significant (P<0.05) higher production (3876.66 kg/ha) was obtained from T2 and the study showed a positive correlation between the culture managed of shrimp farm and the shrimp production and an inverse relation between stocking density and survival rate.
  S. Rahman , P.K. Sarker , S.U. Ahmed , M. Rafiquzzaman and S.M. Ferdous
  A study was carried out during the Aman season (September-Dcember) in the south-west coastal paddy fields of Bangladesh to understand the culture suitability and production potential of two exotic fish species, namely Puntius gonionotus and Cyprinus carpio in rice fish integrated culture system. Twelve paddy plots with size ranges from 1300-27000m2 were stocked with fish at a density of 4930 /ha for mono & mixed culture (50+50%). After 50 days of rearing production rate of fish from monoculture of Puntius gonionotus (T1), mixed culture of Puntius gonionotus1 and Cyprinus carpio (T2) and monculture culture of Cyprinus carpio (T3) was found 280.12, 330.40 (119.64+210.76 kg) and 279.78 kg ha-1, respectively. No significant variation in fish production was observed between T1 and T3. But compare to other treatments significant higher production of fish was obtained from T2. However, for rice production a significant lower production (3.14 ton h-1) was obtained for T3 compare to other two treatments, while higher rate of rice production (3.85ton/h) was recorded for T1. For control plot (T4) the production rate of rice was 3.40 ton h-1. In the study, no negative correlation was found for the integration of fish with rice culture.
  S.U. Ahmed , M.A.Rahman , M.N. Islam , M. Kamal and S. Awal
  An on-farm study was undertaken to investigate the possibility of Artemia culture with salt in the traditional solar salt beds of Bangladesh and to find out the impact of various fertilization treatments on the production performance of Artemia (cysts and biomass) and salt through integrated approach. Four treatments in two consecutive years of experiment like, T1 and T2 ( in the first year), T3 and T4 (in the second year) was applied for this integrated culture system. Treatments were comprised of application of urea and triple super phosphate (TSP) and dried and powdered chicken manure at different doses. Study reveals that modified solar salt beds of Bangladesh having suitable water quality can be successfully utilized for salt Artemia production in the winter months. A significant higher production of Artemia cysts (P=0.0015) and biomass (P=0.0136) was found for treatments T3 (15.23 kg/ha DW) and T3 (196.10 kg/ha WW) respectively. No effect of Artemia - salt integration system was observed on the quantity of salt production.
  M.S. Islam , M.S.A Khan and S.U. Ahmed
  An experiment was carried out at Brackishwater Station, Bangladesh Fisheries Research Institute, Paikgacha, Khulna from July to August, 1999 to assess the effect of feed on larval survival of Macrobrachium rosenbergii. Three treatments viz. Artemia nauplii plus egg custard (T1), Artemia nauplii only (T2) and rotifer-000 only (T3) were taken for the study each with three replicates. The experiment was conducted in celluloid tanks with M. rosenbergii larvae at a density of 50 nos./ litre of water. Highest average survival rate (30.0 %) was found in T1 and the lowest (4.5%) obtained in T3. Analysis of variance showed that the difference in larval survival under different treatments were significantly different (p< 0.01). The results obtained implied that there is a immense potentiality for increasing freshwater prawn seed production through closed water system by using Artemia nauplii plus egg custard as feed.
  M.S.K. Sarker , S.U. Ahmed , S.D.Chowdhury , M. A. Hamid and M. M. Rahman
  Three hundred commercial broiler chicks of three different strains ( Arbor Acres, ISA Vedette and Hybro) each of 100 were reared from day-old to 6 weeks of age to compare their performance characteristics under Bangladesh condition in winter. Body weight gain and feed consumption up to 6 weeks of age were significantly higher in ISA Vedette than in Arbor Acres and Hybro. There was no significant difference between Arbor Acres and Hybro with respect to these variables. Survivability and feed efficiency among the strains were non-significant, although Arbor Acres showed slightly higher survivability than Hybro and ISA Vedette. Despite a slightly higher livability in Arbor Acres, it may be concluded that ISA Vedette may perform the best in winter than in Hybro and Arbor Acres. The later two strains may also be recommended for commercial boiler production in winter, but priority may be given to ISA Vedette strain.
  M.N. Islam , M.N. Islam , S.U. Ahmed , M.M. Hossain and S. Chowdhury
  The effect of mulch and bulb size on the growth of onion was studied using four mulch treatments, viz., non-mulch i.e. control, ridge method of mulch, straw and black polyethylene mulch; and five different sizes of seed bulbs, viz., very small (0.5 g), small (1.0 g), medium (1.5 g), large (2.5 g) and very large (4.5 g). Mulching and bulb size had significant effect on plant height, leaf number, pseudostem diameter, root number and length. The interaction effect of mulch and bulb size was significant in plant height, root length and root number but it was non-significant in leaf number and pseudostem diameter.
  K.U. Ahmed , M.M. Rahman , M.Z. Alam and S.U. Ahmed
  A survey on farmer`s pest control methods and direct yield loss assessment of country bean (Dolichos lablab) was done during September 2000 to February 2001 in North Edilpur and South Mohadebpur villages of Sitakundu under Chittagong district. Results revealed that farmers used Fanfan, Nogos, Ripcord, Malathion, Roxion and Sumithion as chemical methods and applying ash and handpicking of insect pests as non-chemical method to control insect pests. The frequency of insecticide application during flowering stage to harvest was 9 to 15 with waiting period of only 3 to 20 days and 6 to 12 with waiting period of 3 to 25 days in North Edilpur and South Mohadebpur, respectively. The pod infestation by pod borer and aphids varied from 2.29 to 5.12% and from 2.83 to7.16% in North Edilpur and South Mohadebpur, respectively. Insect pests thus caused direct yield loss of 60.38-200.69 kg ha-1 in North Edilpur and 92.63-345.80 kg ha-1 in South Mohadebpur.
 
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