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Articles by M.R. Islam
Total Records ( 11 ) for M.R. Islam
  A.M.A. Kamal , M.R. Islam , B.L.D. Chowdhury and M.A. Maleque Talukder
  A study was undertaken to evaluate the growth performance and grain quality of eight modern wheat varieties grown under rainfed and irrigated conditions. Wheat varieties used in the experiment were aghrani, akbar, ananda, balaka, barkat, kanchan, pavon and sonalika. In irrigated condition, one flood irrigation was applied at 28 days of sowing to saturate the soil up to 15 cm depth. The wheat varieties differed significantly (P<0.05) with respect to plant height and 1000-grains weight, grain and straw yields, protein, amylose, ash and K contents in grains. The highest grain yield obtained in aghrani (2.16 t ha-1) was statistically identical to those found in kanchan (2.08 t ha-1), akbar (2.06 t ha-1) and barkat (2.02 t ha-1). The highest protein content was found in barkat (13.75%), which was followed by ananda (12.65%), akbar (12.55%), sonalika (12.5%), aghrani (12.35%) and kanchan (12.25%). Balaka had the lowest grain protein content (11.55%). The highest amylose content were found in barkat (24.4%) and was followed by balaka (24.25%), aghrani (23.6%), akbar (23.2%), ananda (23.05%) and kanchan (21.75%). Application of irrigation improved the plant characteristics like grain and straw yields, protein, amylose, P, K and S contents in grains compared to wheat grown under rainfed conditions. Among the eight varieties of wheat barkat, aghrani, akbar and kanchan are the promising varieties than the others with respect to grain and protein yields.
  M.R. Islam , M. Jahiruddin and S. Islam
  The levels of arsenic in irrigation waters (STW), soils and rice plants (grain and straw) in five districts viz., Pabna, Chapai Nawabganj, Rajbari, Faridpur and Gopalganj of the Gangetic floodplains of Bangladesh were assessed during the year 2001. The arsenic concentrations for all samples (soil, water, grain and straw) varied considerably between locations. Generally, the arsenic levels in soils and waters were higher in Rajbari and Faridpur compared to the other three districts. There was a good correlation between water-As and soil-As over the locations. None of the soils had arsenic level more than 20 μg g-1 (the maximum acceptable limit for agricultural soils). About 16% grain samples had no detectable As and on the other hand 14% grains had As level more than 1 ppm. Comparing varietal effects, the grain As concentration in IR 8 and BRRI dhan 29 rice were higher in comparison with BRRI dhan 28 and Parija. There was no correlation between rice grain As and soil As content. The As concentrations were always lower in grain than in straw.
  M. Rahman , M.F. Tazim , S.C. Dey , A.K.M.S. Azam and M.R. Islam
  The study was conducted to investigate the alternative livelihood opportunities available and accessible to the fishermen community of Nijhum Dwip under Hatiya Upazila of Noakhali district in Bangladesh. Primary data were collected through household survey using PRA tools such as Focus Group Discussion (FGD) and Crosscheck Interviews (CI) with key informants. The fishers were classified as boat owner-fisher (8%), laborer fisher (60%), fishers engaged in fish drying (18%) and others involved in fishing related occupations (14%). In recent time, fishers’ household income was limited as the highest number (46%) of the fishers’ annual income ranged between 50,000 and 75,000 BDT and the fish resources was decreasing for that supplementary income from other than fishery was of great importance. The most common Alternative Livelihood Generating Activities (ALGAs) identified by the fishers were: poultry (22%), livestock (21%), crop farming (19%), boatman (13%), non-farm day laborer (9%), small business (6%), handicraft/swing (5%), crab catching and fish farming (1%) and others (3%). Depending on high potential to increase income and high potential to increase market demand, a matrix of relative attractiveness of existing livelihood activities and alternative livelihood activities was developed.
  M.R. Islam and M. Belal Hossain
  The Indian bullfrog, Hoplobatrachus tigerinus plays a significant role in maintaining the natural balance in the ecosystems. It plays an important role in controlling the various agricultural pests because of its omnivorous feeding habit. The aim of the present study is to know the genetic variation of H. tigerinus in three natural habitats. Samples collected from three districts of Bangladesh were analyzed with five enzymes (MDH, LDH, GPI, PGM and EST) in CA 6.1 buffer system for their genetic variation. Four polymorphic loci (Mdh-1, Est-1, Gpi-1 and Pgm) were interpretable in muscle with starch gel electrophoresis. Among the 5 presumptive loci, the mean proportion of polymorphic loci was observed 80, 80 and 60% in Rangpur, Khulna and Mymensingh populations, respectively. The highest mean number of allele per locus and mean proportion of heterozygous loci per individual were observed in the Rangpur population. The average observed heterozygosity (Ho) was 0.163 and expected heterozygosity (He) was 0.469. In pair-wise analysis, comparatively higher Nm value (5.507) was estimated between the Rangpur and Khulna populations corresponding lower level of FST value (0.043). The UPGMA dendrogram showed two clusters among the three Indian bullfrog populations. Rangpur and Khulna populations formed one cluster while Mymensingh population formed another cluster. The Mymensingh population separated from Rangpur and Khulna by a genetic distance of 0.177 whereas, the Khulna population is different from the Rangpur population by the genetic distance of 0.052. The results suggested that the considerable genetic variation is maintained among the natural H. tigerinus populations.
  M.A. Latif , M.M. Rahman , M.R. Islam and M.M. Nuruddin
  Field experiment was conducted to study the arthropod biodiversity in the brinjal field during February to August. Twenty species of harmful arthropods under 17 families were observed belonging to 6 different orders. The brinjal shoot and fruit borer (Leucinodes orbonalis), jassid (Amrasca biguttula biguttula), epilachna beetle (Epilachna sp.) white fly (Bemisia tabaci) and aphid (Aphis gossypii) were found as the most common and major insect pests of brinjal. Ten plant dwelling predaceous arthropod families were found in the field among them 42.44% were occupied by three families under Coleopteran insect. Spider under lycosidae family possessed 30.23%, which was ranked as the second most important arthropods. Surface dwelling arthropods caught in pitfall traps were grouped into 17 families among them 7 families were identified as predators. Formicidae was occupied 67% of the total surface dwelling predaceous arthropod.
  Naser H.M. , M.R. Islam , N.C. Basak and M.M.Ahmed
  Two different experiments were conducted in widely separated farmers field at Phulpur MLT site of On-Farm Research Division (OFRD), Mymensingh during the two consecutive rabi seasons of 1997-98 and 1998-99 to study the effectiveness of two promising strains of Rhizobium BARI and BAU along with chemical fertilizers on nodulation and yield of groundnut (var. Dhaka-1) and also to select the suitable combination of Rhizobium inoculum and NPKS fertilizers. Five treatment combinations such as Control, NPKS, PKS, Inoculum and PKS+Inoculum each replicated 4 times in randomized complete block design were included in the study. Significant differences were observed in all the parameters studied. Among the two strains of Rhizobium tested BAU strains performed better than BARI strain. Rhizobium inoculation alone or with PKS fertilizers produced significantly higher nodule number, pod number, pod weight, nut yield and stover yield compared to uninoculated ones. The highest nut and stover yield was produced by the treatment PKS+Inoculum. However, the economic evaluation of the crop suggested that the treatment Inoculum was most suitable for groundnut production.
  M.Z. Rahman , A. Reza , M.S.K. Sarker , F. Kabir and M.R. Islam
  The mean yield of rice, rice straw, rice bran, till oil seed, mango tree and jack fruit tree number and other feeds decreased significantly (p<0.01) after shrimp culture compared with before shrimp culture. The salinity and pH of water under shrimp culture area (saline area) are significantly (p<0.01) higher than that of non-shrimp culture area (non-saline area). In case of soil, the average EC value and pH under shrimp culture area are significantly (p<0.01) higher compared with non-shrimp culture area. The chemical composition of green grass, rice straw and rice bran is similar for both of shrimp culture and non-shrimp culture areas. So the production of livestock feeds have been affected following the shrimp farming practices but it do not affect the feed quality.
  M.R. Islam , M.A.B. Faruquei , M.A.R. Bhuiyan , P.S. Biswas and M.A. Salam
  Genetic diversity of 62 genotypes of irrigated rice originating from BRRI, IRRI and China were studied through Mahalanobis D2statistic. The genotypes were grouped into five clusters. The cluster II and IV contained the highest number of genotypes (16) and the cluster I contained the lowest (7). The highest intra cluster distance was noticed for the cluster I and the lowest for cluster III. The highest inter cluster distance was observed between cluster I and cluster IV followed by cluster I and cluster V, cluster I and cluster III, cluster III and cluster IV and lowest between cluster IV and cluster V. The highest cluster means for yield and other three yield contributing characters are obtained from cluster I, six highest and two second highest means for yield contributing characters are found in cluster III but the lowest cluster mean for yield. Therefore more emphasis should be given on cluster I for selecting genotypes as parents for crossing with the genotypes of cluster III, which may produce new recombinants with desired traits.
  M.A. Mannan , S.A.K.U. Khan , M.R. Islam , M. Sirajul Islam and Ayesha Siddiqa
  Fruit characteristics of some mango varieties grown in Khulna region were studied at the Horticulture Laboratory, Agrotechnology Discipline of Khulna University, Khulna during the period from March to December, 2002. The objectives of the experiment were to evaluate the pattern of physico-chemical properties of mango varieties Amrapali, Sharmai Fazli, Neelambori, Indian Lota and Madrazi Tota. Mango fruits were collected from mango growers of Botiaghata Upazila, Khulna. The experiment was laid out in Completely Randomized Design (CRD) with three replications. Observations were made on different fruit characteristics, physical and chemical properties in three ripening stages viz. green, ripe and over ripe stage. The fruits of the varieties Amrapali, Sharmai Fazli, Neelambori, Indian Lota and Madrazi Tota weighed 189, 455, 180, 170 and 592 g, respectively. Maximum percentage of edible portion (78.53%), juice content (56.50-72.77%) and highest Total Soluble Solids (18.66%) were found in Madrazi Tota. Riped Madrazi Tota tastes very sweet in comparison to other varieties of mangoes under study. Indian Lota was higher in content of titratable acidity (0.04091%) and lowest in Neelambori (0.01866%).
  M.I. Hosen , A.U. Ahmed and M.R. Islam
  Ten isolates of Botrytis cinerea causing botrytis gray mold in chickpea were collected from different agro climatic regions of Bangladesh to study the variability among them. The isolates were characterized in terms of cultural, morphological and pathogenic. The isolates varied significantly in cultural and morphological traits- colony color, shape, margin and texture; production and arrangement of sclerotia on PDA medium. The length of conidia varied from 5.00 to 15.00 μm. Mean length of conidia was found maximum (12.00 μm) in isolate AHI-9 and minimum (7.50 μm) in isolate AHI-1. The breadth of conidia ranged from 5.00 to 10.00 μm. The highest mean breadth (8.25 μm) was observed in isolate AHI-9 and the lowest (6.00 μm) in isolate AHI-4. The isolates exhibited reaction ranged from highly susceptible to resistant to a set of 9 chickpea cultivars and among them AHI-9 and AHI-10 were found the most virulent isolates.
  Tanjina Rahman , A.U. Ahmed , M.R. Islam and M.I. Hosen
  The experiment was carried out to study and the evaluation of six fungicides and an antagonist both in vitro and in vivo condition against stemphylium blight disease of lentil caused by Stemphylium botryosum. The investigation was undertaken at Plant Pathology Division, Bangladesh Agricultural Research Institute, Gazipur, Bangladesh during September 2007 to April 2008 using completely randomized design in lab condition and completely randomized block design in filed condition. The colony color of S. botryosum was greenish brown, irregular margin and velvety texture was found on PDA medium. The suitable temperature and pH for the maximum colony growth was recorded at 25°C and 6.0, respectively. The maximum (100%) germination of conidia was found at 25°C after 6 h of incubation. From the in vitro test, six fungicides have the potentiality to inhibit the radial mycelial growth at a lower (500 ppm) concentration except Agrimyl (Mancozeb+Metalaxyl) whereas it inhibited radial colony growth at higher (2000 ppm) concentration. In field condition the minimum disease score (1.0) was recorded from Iprosan 50 WP treated plot and the highest (4.75) was found in control plot. Among the six fungicides Iprosan from the iprodione group gave the best performance. The highest root length (9.48 cm), shoot length (44.6 cm), number of branches plant-1 (9.25), number of pods plant-1 (39.10), thousand grain weight (21.08 g) and grain yield (1271.00 kg ha-1) was obtained from Iprosan 50 WP.
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