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Articles by M.A. Kashem
Total Records ( 3 ) for M.A. Kashem
  A. Nath , M.A. Kashem and S. Ali
  Background and Objective: Agriculture is the largest food producing sector of the economy of Bangladesh. It is essential to adopt more steps for increasing the production level of rice. Fertilizers are inevitable for the crop production systems of modern agriculture. Among the factors that affect crop production, fertilizer is the most significant factor that plays a crucial role in yield increase. The experiment was conducted to observe the effect of fertilizer and agronomic management on growth, yield and yield contributes of boro rice. Materials and Methods: The experimental site was located under the Agroecological Region Sylhet Basin (AEZ-21) having moderately acidic soils. The experiment was designed with seven treatments including T1: Farmers’ practiced based fertilizer (180-42-42 kg ha–1 of urea-TSP-MoP), T2: BARC recommended dose based fertilizer (300-112-127-75-11 kg ha–1 of urea-TSP-MoP-CaSO4-ZnSO4), T3: T2+Wet Irrigation, T4: T2+Wet and dry irrigation, T5: T2+Proper seedling age, T6: T2+PSA (proper seedling age), T7: IPNS (integrated plant nutrient system)+proper seedling age+IPM. The test crop was BRRI dhan58. The experiment was laid out in a randomized complete block design (RCBD) with five farmers’ replications. Data were taken on growth, yield and yield contributing characters of BRRI dhan58 and analysed with the help of MSTAT-C program. Results: The plant height varied significantly and found the longest plants due to T7. Tillering followed the similar pattern of plant height where the highest number of tillers hill–1 were recorded in T7 IPNS (integrated plant nutrient system)+proper seedling age and spacing+IPM. The yield and yield contributing characters of BRRI dhan58 varied significantly due to application of balanced fertilizers according to BARC recommendation guide with proper agronomic management. The highest grain yield (8.74 t ha–1) and straw yield (11.77 t ha–1) were recorded from IPNS (integrated plant nutrient system)+proper seedling age and spacing+IPM over farmers’ practice based fertilizers (T1). Post-harvest soils showed the higher nutrient content in comparison to initial soil due to application of balanced fertilizers. Conclusion: It was concluded that balanced fertilizer application with proper agronomic management may be recommended for higher yield of BRRI dhan58 in the hoar area.
  M.M. Rahman , H. Ferdowsy , M.A. Kashem and M.J. Foysal
  Tail and fin rot disease occurred in Indian major carp, catla (Catla catla) and climbing perch, koi (Anabas testudineus) in fish farms located at two districts of Bangladesh. The affected fish showed lesion and erosion on the tail and fins. Approximately, 40% mortality was recorded in those farms. The present study was conducted to isolate and identify the bacterial pathogen causing the disease, to conduct artificial infection challenge for confirmation of the pathogen and to know the antibiotic sensitivity pattern of the isolates. Bacteria were isolated from the lesions of diseased fish on Cytophaga agar medium where they developed characteristic yellowish pigmented colonies. They were identified as Flavobacterium columnare based on biochemical characterization tests. All of the isolates were found to be highly virulent for carp fish (Puntius gonionotus) in artificial infection challenge experiment but, virulence for koi fish (A. testudineus) were found to be varied. These isolates exhibited sensitivity to antibiotics chloramphenicol, oxytetracycline, erythromycin, streptomycin, but some of them were resistant to sulphamethoxazole and all were resistant to gentamicin and cefradine.
  M.J. Islam , M.G. Rasul , M.A. Kashem , M.M. Hossain , A.A. Liza , M.A. Sayeed and M. Motaher Hossain
  Studies were conducted to investigate impacts of oxytetracycline on Barbonymus gonionotus muscle. Oxytetracycline the most widely used antibiotics, was fed to Barbonymus gonionotus with 4 g kg–1 rate through diet for 45 days. Growth rate was observed for different concentrations of oxytetracycline. Water quality parameters and bacterial quantification were observed for a period of 21 days. Pond water, sediment and fish muscle were tested before and after oxytetracycline medicated feeding. Before feeding of oxytetracycline medicated feed, there was no oxytetracycline in water, sediment and fish muscles. After 2 days of feeding the initial oxytetracycline accumulation was 5070.0 ppb, which reduced considerably to 1190.0 ppb after 20 days from end of medicated diet feeding and not detected after 42 days. Physico-chemical parameters of pond water were determined. Before treatment dissolve oxygen, pH and total hardness of fish pond was 4.516±0.25 mg L–1, 7.413±0.09 and 822.33±1.52 ppm, respectively. After 21 days of study period, reached to 5.27±0.025 mg L–1, 7.773±0.04 and 769.66±2.08 ppm. It indicates a little change after 21 days. Before oxytetracycline treatment, bacterial load in Barbonymus gonionotus pond was 9.417±0.035×103 CFU g–1 in water, 7.31±0.04×107 CFU g–1 in sediment, 6.51±0.04×06 CFU g–1 in fish gills and 8.52±0.035×107 CFU g–1 in fish intestine, which was significantly reduced to 5.28±0.02×103 CFU g–1 in water, 2.91±0.02×107 CFU g–1 in sediment, 2.21±0.02×106 CFU g–1 in gills and 2.39±0.02×107 CFU g–1 in intestine.
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