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Articles by M.N. Alam
Total Records ( 2 ) for M.N. Alam
  M.S. Islam , M.O. Islam , M.N. Alam , M.K. Ali and M.A. Rahman
  A field experiment was conducted in the research field of Bangladesh Institute of Nuclear Agriculture (BINA), Mymensingh, during the period from December 2003 to March 2004 to study the effect of GABA on growth and yield attributes of onion (cv. BARI peaj-1). The experimental field was medium fertile and silt loam in texture. Effect of GABA (a mixture of GA3 and STC4771) sprayed at 30 DAT with 0.0, 0.5, 1.0 and 2.0 mg L-1 was investigated. The treatments were laid out in one factorial RCBD design where each treatment was replicated five times. All morphological characters, growth and yield attributes were significantly affected by the application of GABA, which at 1.0 mg L-1 produced the highest plant height, leaf length, number of leaves, neck and bulb diameter, bulb length, leaf diameter, root length; fresh weight of bulbs, roots and leaves; splitting of bulbs, leaf and bulb yield of onion. GABA at 1.0 mg L-1 was more effective in enhancing growth and yield attributes than 0.5 and 2.0 mg L-1. Application of GABA at 0.5, 1.0 and 2.0 mg L-1 increased the bulb yield by 20.18, 28.09 and 7.02%, respectively. The results suggested that GABA at 1.0 mg L-1 is suitable for onion or any vegetable crop production but GABA at 2.0 mg L-1 may be harmful for plant growth.
  M.K. Ali , M.A.B. Barkotulla , M.N. Alam and Kh. A. Tawab
  The study was carried out on the effects of different level of nitrogen on yield and yield contributing characters of three varieties of carrot. Two different factors were considered in the study. They were A. nitrogen level: 0, 50,100 and 150 kg N ha-1 and B. three variety: Sufola, SB Kuroda and New Kuroda. The experiment comprised twelve treatments combination. The 2 factor experiment was laid out in randomized complete block design with three replications. The size of a unit plot was 1.5 x 1.0 m. The crop was fertilized as per treatments of the experiment. Seeds of three carrot varieties were sown on 15, October 2003 with a spacing 10 x 20 cm and harvesting was down on 25 January, 2004. Data were collected from 5 randomly selected plant of each plot at harvest. The collected data were statistically analyzed. Nitrogen level showed significant effects on growth and yield of carrots. On the other hand, maximum number of leaves, plant height, root length, root diameter, fresh and dry weight of shoot, fresh and dry weight of root and root yield were obtained by the 150 kg N ha-1 applied, the variety SB Kuroda showed the best response in all parameters except leaves per plant, plant height and root length. The results of the study revealed that number of leaves and plant height were significantly influenced by different nitrogen nutrients. The highest number of leaves per plant (9.59) was produced by the treatment 150 kg N ha-1 and the variety Sufola produced maximum number of leaves when applied 150 kg N ha-1 and the lowest number of leaves in control. The tallest plant (28.95 cm) was produced by 150 kg N ha-1 and the lowest plant height in control. The variety Sufola fertilized with 50 kg N ha-1 gave the highest plant height (29.33 cm). Fresh and dry weight of shoot were significantly influenced by nitrogen nutrition. When fertilized with 150 kg Nha-1 the crop produced the highest fresh weight, whereas percent of dry matter higher. Significantly different results were found in case of root length and diameter by nitrogen application. The highest root length and diameter was recorded when applied 150 kg N ha-1. The variety SB Kuroda fertilized with 150 kg N ha-1 and 100 kg N ha-1 produced the highest root length and diameter. The fresh and dry weight of root were also significant influenced by nitrogen dose and variety. 150 kg N ha-1 fertilizing produced the highest fresh and dry weight of root and the variety SB Kuroda gave the best result in fresh and dry weight of root. There were no significant variation among three varieties in respect of leaves per plant, plant height, shoot fresh and dry weight, root length and root diameter. The root yield was significantly influenced by applied nitrogen nutrition. The highest root yield (27.82 t ha-1) was obtained from treatment 150 kg N ha-1 and the lowest yield (18.04 t ha-1) was found when no application of nitrogen. The variety SB Kuroda gave the highest yield of 26.03 t ha-1 while the lowest yield of 19.00 t ha-1 by variety Sufola. The combined effect of nitrogen and variety performed significantly in respect of all parameters. On the other hand, application of nitrogen 150 Kg ha-1 and three varieties showed good response in respect of yield and yield contributing characters. When applied 150 Kg N ha-1, SB Kuroda was the best in all parameters except leaf number, plant height, shoot fresh and dry weight. The highest yield of 31.06 t ha-1 by SB Kuroda while the lowest yield of 14.57 t ha-1 by the variety Sufola in control plot.
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