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Articles by M. Al-Amin
Total Records ( 3 ) for M. Al-Amin
  M. Al-Amin and A. Nahar
  This study was conducted with a view to investigate the productive and reproductive performances of non-descript and crossbred dairy cows in costal area (Barisal Division) of Bangladesh. For this purpose a total of 105 dairy cows were selected from rural farmers, of which 30 cows local (L), 49 cows Local x Friesian (LxF) and 26 were Local x Sahiwal (LxSL) crossbred dairy cows. The traits studied were age At First Heat (AFH), age At Cirst Calving (AFC), Services Per Conception (SPC), Post Partum Heat Period (PPHP), Daily Milk Yield (DMY), Total Lactation Yield (TLY) Lactation Length (LL) and Calving Interval (CI). From the result, it was revealed that age At First Heat (AFH), age At First Calving (AFC) and Services Per Conception (SPC) of LXF crossbred dairy cows were significantly (p<0.01) lower than other groups. Post Partum Heat Period (PPHP) of L x SL crossbred cows were significantly (p<0.01) lower. Average Daily Milk Yield (DMY), Total Lactation Yield (TLY) and LactationLength (LL) of LxF groups were 5.9±0.14, 1836.7±18.2 L and 339.2±7.4 days, respectively, which is significantly (p<0.01) higher than L and LxSL groups. The Calving Interval (CI) was found highest in L x F crossbred cows compared to others.
  M. Al-Amin , M. Alamgir and M.A.R. Bhuiyan
  The study describes the structural composition of a degraded forest of Chittagong, Bangladesh. Stratified random quadrat was used in this study. Tectona grandis was found as dominant with 28.87% of the total individuals, Diameter at Breast Height (DBH) range less than 5 cm represent highest percentage (66.14%) of all the individuals however the largest DBH range >17 cm represent only 0.84% of all the individuals. The number of trees and the number of species was the highest (158 and 32, respectively) in the <5 cm DBH range and least number of trees and species (1 and 1) was represent in 15-16.9 cm DBH ranges. Height class <3 m consist of the highest individuals (55.67% of total population). Tectona grandis showed the highest percentage (28.8%) followed by Ficus hispida (12.97%), Eucalyptus camaldulensis (7.53%), Albizia lebbeck (5.86%) and Gmelina arborea (5.44%). Number of trees and species are decreased with increasing height and DBH classes. This may be due to recent adopting management measures like protection of the area for biodiversity conservation.
  M. Siddiqur Rahman , S. Akter and M. Al-Amin
  Physical responses of plants to change in climatic factors like temperature, precipitation and abiotic factors like salinity intrusion may lead positive or negative effects. Some factor may promulgate growth while other may stunts their vigour. Present study seeks growth of a plantation species at its early stage of life towards elevated temperature and saline water stresses. Growth records of Swietenia macrophylla seedlings were enumerated by measuring height, collar diameter and leaf number development of the replicates growing at an environment-controlled plant growth chamber. One experimented with merely elevated temperature while other tries to find results of combined effect of elevated temperature (30, 32 and 34°C) and saline (0.5, 1.5 and 2.5 g L-1 NaCl) to said species seedlings. Seedling replicates showed diverse response to elevated temperature and saline irrigation at height, collar diameter and leaf number development. Results depict that elevated temperature alone might be positive for S. macrophylla seedlings, rather most favourable for its growth in height, however, collar diameter and leaf number may remain unaffected. Saline treatment along with higher temperature stresses may lead seedlings toward stunted or very low growth. As saline intensity increases, species growth tends to decrease proportionally. Elevated temperature aided with higher salinity may direct further under development of S. macrophylla seedlings which is distressing to plantation establishment of this species in sites which are vulnerable to salinity intrusion due to climate change. However, S. macrophylla may be a promising plantation species in drier part of the globe in near future.
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