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Articles by M.K. Alam
Total Records ( 4 ) for M.K. Alam
  M.K. Alam , M.H. Rashid , M.S. Hossain , M.A. Salam and M.A. Rouf
  Four different media namely- Hyponex, Murashige and Skoog (MS), OKF1 and Knudson C (KC), were tested for large scale multiplication of sympodial native orchid, Dendrobium transparens Wall. via seeds. MS medium was found to be best for characters studied in Dendrobium transparens, followed by Hyponex medium but OKF1 medium gave the least performance. Days required to seed germination was the minimum (50 days) in MS medium while the maximum days (59 days) was required by OKF1 medium. Considering other characteristics, such as days required to protocorm formation and plantlet development, number of leaves and roots per plantlet, plantlet height and root length and finally plant survivability percentage, MS medium showed significantly better performance for in vitro seed propagation of Dendrobium transparens.
  M.A.H. Talukder , M.A. Mannaf , M.K. Alam , M.A. Salam and M.M.U. Amin
  A study was under taken to find out the effect of sowing time; spacing and picking interval on yield and yield components of okra (BARI Dherosh-1). Green pod yield was significantly higher when crop was sown on April (18.92 t ha–1) than March sown crop (16.24 t ha–1). Significantly highest yield (20.99 t ha–1) was recorded at closer spacing (60 x 30 cm2) than wider spacings. Yield was gradually decreased with increasing picking interval. Higher yield was obtained at 2 days picking interval (21.74 t ha–1), which was statistically similar to 3 days picking interval (19.53 t ha–1). Interaction among the effects of sowing times, spacing and picking interval on yield and yield components were found significant except interaction of sowing time with picking interval. The results showed that 2 or 3 days picking interval with closer spacing (60 x 30 cm2) sown in April were found higher yield (24.94 and 23.79 t ha–1, respectively) in okra (var. BARI Dherosh-1).
  M. Aktaruzzaman , A.N.M. Fakhruddin , M.A.Z. Chowdhury , Z. Fardous and M.K. Alam
  Accumulation of heavy metals in environmental matrices is a potential risk to living system due to their uptake by plants and subsequent introduction into the food chain. A study was conducted to investigate the heavy metals concentration in soils and leafy vegetables samples along the Dhaka Aricha Road to assess their potential ecological risk. Heavy metals concentration was analyzed by Atomic Absorption Spectroscopy. Concentrations of all the tested heavy metals except Cd in soil samples were below the permissible level. The mean concentration of Cd was found 3.99±1.85 mg kg-1. Concentrations of all the tested heavy metals except Cd and Cr in vegetables samples were lower than recommended level. Mean concentration of Cd and Cr were found 1.00 ± 0.68 mg kg-1 and 2.32±0.84 mg kg-1, respectively. Based on the Potential Ecological Risk Index, Cd posed very high risk to the local ecosystem due to its higher Risk Factor, >320 and based on Transfer Factor of Pb and Cd were found higher accumulator among the tested metals. The results of present study revealed that the bioconcentration of heavy metals along the Dhaka Aricha Road posed high risk to the ecosystem. Considering the Transfer Factor of Cd and Pb it can be suggested that plants and leafy vegetables grow in the soil near Dhaka Aricha Road should not be used as food or feed.
  M.K. Alam , Z. Islam , M.A.Rouf , M.S. Alam and H.P. Mondal
  A field experiment was conducted at the Hill Agricultural Research Station, Khagrachari to find out a suitable planting material and mulch material for turmeric production in the hill slope of Chittagong Hill Tracts. Nine treatment combinations comprising 3 levels of planting material (mother rhizome, primary finger and secondary finger) and 3 levels of mulching (rice straw, sungrass and non-mulched) were compared. Mother rhizome showed better yield performance. Sungrass appeared the best mulching material for producing higher turmeric yield. Mother rhizome coupled with sungrass mulching gave significantly higher yields (387.6 g clump-1 and 29.4 t ha-1) of turmeric in hilly region of Bangladesh.
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