An experiment was conducted to investigate the effects of organic fertilizer rate
on CH4 emission... more An experiment was conducted to investigate the effects of organic fertilizer rate on CH4 emission and yield of Aman rice in the experimental field of Environmental Science at Bangladesh Agricultural University, Mymensingh during July to November, 2013. The study was conducted with six treatments of recommended doses of inorganic fertilizer, compost @ 10 t ha-1, 20 t ha-1, 30 t ha-1, 50 t ha-1 and control (without fertilizer). Air samples were collected by the modified closed-chamber method and analyzed by gas chromatograph equipped with a Flame Ionization Detector (FID). CH4 emission was influenced by compost fertilizer application rate. The highest CH4 emission (1655.71kg ha- 1) and the lowest CH4 emission (789.12kg ha-1) was found from control plot. Compost fertilizer application significantly affected the plant yield contributing parameters. The highest grain yield (5.8 t ha-1) and biological yield (13.37 t ha- 1) were found from 20 t ha-1. The highest tiller hill-1(16.31) and harvest index (43.94) were found from compost @ 50 t ha-1 (T6). The lowest effective tiller hill-1(10.07), panicle length (10.03 cm), grain yield (4.51 t ha-1) and biological yield (11.58 t ha-1) were found from control plot. In respect of rice yield and methane emission, compost @ 20 t ha-1(T4) was found better than other treatment.
Like other pollutions noise pollution is now a new threat for many cities of the world. The study... more Like other pollutions noise pollution is now a new threat for many cities of the world. The study was conducted to determine noise pollution in different zone of the Jamalpur sadar municipal area in the year of 2014. In total 45 samples were obtained from 15 locations covering 5 sensitive areas and the measurements were done at morning, afternoon and evening periods. The Noise level was determined by Sound Level Meter (Multi-function Environmental Meter, Model: ST- 8820). All the studied areas showed higher than maximum allowable noise level where the highest average level of sound (87.33 dBA) was observed at traffic area during morning hours and lowest average level of sound (54.33 dBA) was observed at residential area during evening hours. A total of 100 respondents were selected to evaluate respondent’s perception and effects of noise pollution. In the studied area, main noise source was traffic (57%) where small vehicle like auto bike and rickshaw were main culprit. Majority of the respondents claimed headache and heart bit problems due to traffic noise. The proper utilization of traffic enforcement laws was suggested by most of the respondents, driver and public awareness on noise pollution was also suggested to minimize noise pollution.
The presence of formalin and ethepon was investigated in some fruits viz. Apple, Banana and Mango... more The presence of formalin and ethepon was investigated in some fruits viz. Apple, Banana and Mango collected from three local markets viz. Bangladesh Agricultural University (BAU) KR Market, BAU Shesh More market and Notun Bazar of Mymensingh Sadar. Samples were analyzed by gas chromatograph coupled with flame ionization detector. Data were tested in indentical condition with proper calibration of the instrument. Of the samples, 67 percent were free from both chemicals. About 10 ppm formalin was detected in the apple samples of BAU Shesh More. In contrast, 32 ppm ethepon was quantified in the banana samples of BAU KR market.
An experiment was conducted to investigate the effects of organic fertilizer rate
on CH4 emission... more An experiment was conducted to investigate the effects of organic fertilizer rate on CH4 emission and yield of Aman rice in the experimental field of Environmental Science at Bangladesh Agricultural University, Mymensingh during July to November, 2013. The study was conducted with six treatments of recommended doses of inorganic fertilizer, compost @ 10 t ha-1, 20 t ha-1, 30 t ha-1, 50 t ha-1 and control (without fertilizer). Air samples were collected by the modified closed-chamber method and analyzed by gas chromatograph equipped with a Flame Ionization Detector (FID). CH4 emission was influenced by compost fertilizer application rate. The highest CH4 emission (1655.71kg ha- 1) and the lowest CH4 emission (789.12kg ha-1) was found from control plot. Compost fertilizer application significantly affected the plant yield contributing parameters. The highest grain yield (5.8 t ha-1) and biological yield (13.37 t ha- 1) were found from 20 t ha-1. The highest tiller hill-1(16.31) and harvest index (43.94) were found from compost @ 50 t ha-1 (T6). The lowest effective tiller hill-1(10.07), panicle length (10.03 cm), grain yield (4.51 t ha-1) and biological yield (11.58 t ha-1) were found from control plot. In respect of rice yield and methane emission, compost @ 20 t ha-1(T4) was found better than other treatment.
Like other pollutions noise pollution is now a new threat for many cities of the world. The study... more Like other pollutions noise pollution is now a new threat for many cities of the world. The study was conducted to determine noise pollution in different zone of the Jamalpur sadar municipal area in the year of 2014. In total 45 samples were obtained from 15 locations covering 5 sensitive areas and the measurements were done at morning, afternoon and evening periods. The Noise level was determined by Sound Level Meter (Multi-function Environmental Meter, Model: ST- 8820). All the studied areas showed higher than maximum allowable noise level where the highest average level of sound (87.33 dBA) was observed at traffic area during morning hours and lowest average level of sound (54.33 dBA) was observed at residential area during evening hours. A total of 100 respondents were selected to evaluate respondent’s perception and effects of noise pollution. In the studied area, main noise source was traffic (57%) where small vehicle like auto bike and rickshaw were main culprit. Majority of the respondents claimed headache and heart bit problems due to traffic noise. The proper utilization of traffic enforcement laws was suggested by most of the respondents, driver and public awareness on noise pollution was also suggested to minimize noise pollution.
The presence of formalin and ethepon was investigated in some fruits viz. Apple, Banana and Mango... more The presence of formalin and ethepon was investigated in some fruits viz. Apple, Banana and Mango collected from three local markets viz. Bangladesh Agricultural University (BAU) KR Market, BAU Shesh More market and Notun Bazar of Mymensingh Sadar. Samples were analyzed by gas chromatograph coupled with flame ionization detector. Data were tested in indentical condition with proper calibration of the instrument. Of the samples, 67 percent were free from both chemicals. About 10 ppm formalin was detected in the apple samples of BAU Shesh More. In contrast, 32 ppm ethepon was quantified in the banana samples of BAU KR market.
Research in Agriculture Livestock and Fisheries, 2015
A study was conducted to assess the present status of poultry waste management by poultry farmers... more A study was conducted to assess the present status of poultry waste management by poultry farmers in Trishalupazila of Mymensingh district, Bangladesh during July to November 2013. A structured, pre-tested questionnaire was used for collecting data. The highest 52% respondents were involved in layer farming and majority of the respondents did not use any litter materials where 36% and 12% used rice husk and sawdust respectively as litter. The availability of storage and treatment facilities was in 24% farms but their storage system was uncovered. Fifty per cent of the farmers sold their litter while some other used as fish feed, soil amendment and for biogas production. Only 16% farmers faced diseases related to poultry waste and the rest (84%) never faced any disease. It was noticed that 54% farmers faced environmental problems and 46% were unconcerned about environmental problem. They considered odor, flies and mosquitoes and leaching as environmental problem. Only 24% farmer ment...
Ecosystem respiration (RE) from cultivated ecosystems is important for understanding the role of ... more Ecosystem respiration (RE) from cultivated ecosystems is important for understanding the role of these ecosystems in the global carbon balance. To evaluate carbon dynamics in a double-rice cropping paddy field, we conducted long-term measurements at Mymensingh, Bangladesh in 2007 using a tower-based eddy covariance technique. The study objectives were to investigate the diurnal and seasonal variations in RE and to develop and evaluate empirical models for predicting variations in RE using environmental parameters. We found that the diurnal pattern of RE was driven by soil temperature (Ts) whereas the seasonal variation in RE was controlled primarily by Ts and soil water content (SWC). Under high biomass conditions, Ts plays a dominant role in the magnitude of CO2 release. Both the amount and magnitude of RE variation were larger in the "Boro" dry-season rice growing period from late winter to mid-summer than in the "Aman" wet-season rice growing period from late ...
This study was conducted to evaluate the effect of land uses and soil management
practices on the... more This study was conducted to evaluate the effect of land uses and soil management practices on the soil organic carbon (SOC) and soil total nitrogen (STN) in different agricultural soils of Mymensigh district located in northern Bangladesh 24°45′14″N 90°24′11″E. The land use types considered were cultivated (single, double and triple cropped), agroforestry, fallow land and grass land. 32 soil samples were collected covering above land use types. SOC and STN were significantly varied in different land use pattern and soil management practices. Among all land use pattern the highest SOC and STN were found under agroforestry and the lowest was found under fallow land. Cropping pattern also influenced the SOC accumulation in soil where rice-fallow-rice cropping pattern had highest SOC accumulation and lowest was found in rice-rice-rice cropping pattern. Organic carbon dynamics highly regulated by organic fertilizer application and tillage operation. The carbon to nitrogen (C: N) ratio was affected by land use systems and the ranges obtained 4.9 to 11.6. The C: N ratio was narrows in different agricultural land use pattern and higher in agroforestry system. The contents of total nitrogen was strongly associated (R2 = 0.98) with total organic carbon and decreased consistently with increasing soil depth under all land use systems. The result of this study will help to develop future plan about land use and soil management regarding soil carbon and nitrogen dynamics for better economic returns with environmental protection.
Geographical position of Bangladesh makes it vulnerable to several extreme weather events like cy... more Geographical position of Bangladesh makes it vulnerable to several extreme weather events like cyclone in the southern part due to extreme climatological events. Therefore, in this study, we had mainly tried to study on the variations of temperature, relative humidity (RH) and sunshine hours (SH) in the coastal areas to find out its effect on the formation of cyclone. Data from 1975-2014 of these climatic variables was provided by the Bangladesh Meteorological Department (BMD) and analyzed with the statistical tool MS Excel 2010 as per objective of the study. Results showed that in the16 stations, temperature has shown homogenous trend where it has seen that in all the stations the Tmean and Tmax were ranging from 180C to 300C and 280C to 420C respectively. In maximum stations, the Tmax and extreme Tmean has found in the months of April and May which is a cyclone occurring month. Again RHmax has mostly found in the post monsoon season where RHmean is ranging 84~88% mainly in the Khulna, Mongla, Khepupara and Barisal areas, may have profound influence on the formation of cyclone especially in this area. SHmax has found in the month April where the highest was about 12.08 hr. These higher amounts of temperature play profound influence in increasing temperature in the studied areas which have direct consequences on cyclone events. So, extreme temperature, RH and SH in these months may had profound influence on the formation of cyclone. These information could be very useful to the related scientists to study on several extreme weather events due to variation of temperature especially on cyclogenesis which are a most common devastating phenomenon for the coastal areas like Bangladesh.
In Bangladesh, agriculture play an important role in sector of the economy and it is highly depen... more In Bangladesh, agriculture play an important role in sector of the economy and it is highly dependent on climate. The present study was conducted to assess farmer’s perception on climate change and soil carbon sequestration (SCS) in the Ludhua village under Senbagh upazilla of Noakhali district during November 2012 to February 2013. The study consisted of 94 randomly selected farmers. It was observed that nearly about 77% respondent realized change in climate and 23% respondent found no variation in climate; among them 69.5% respondent claimed temperature is increasing. About 55.1% respondent believed man made activity responsible for extreme event (i.e. flood, cyclone, drought etc) while 38.5% respondent believed nature is the responsible for extreme event. Most of the respondent (94.7%) found organic farming improves soil health. Crop residues are important source of soil organic matter which captures soil carbon by the formation of humus. About 86.1% respondent had concept about crop residue. Majority of the farmer (53.2%) claimed that composting increase soil organic matter. Conservation agriculture like crop rotation, cropping pattern, conservation, tillage and stubble retention irrigation and fertilization are the main drivers for SCS. Although most of the (57.2%) farmers had no idea about soil carbon and SCS but they followed various soils management practices for better crop yield (crop rotation 90.3%, irrigation 98.96% and fertilization 96.8%) which helps to increase soil organic carbon.
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Micrometeorology by Shahadat Hossen
on CH4 emission and yield of Aman rice in the experimental field of
Environmental Science at Bangladesh Agricultural University, Mymensingh
during July to November, 2013. The study was conducted with six treatments
of recommended doses of inorganic fertilizer, compost @ 10 t ha-1, 20 t ha-1, 30
t ha-1, 50 t ha-1 and control (without fertilizer). Air samples were collected by
the modified closed-chamber method and analyzed by gas chromatograph
equipped with a Flame Ionization Detector (FID). CH4 emission was influenced
by compost fertilizer application rate. The highest CH4 emission (1655.71kg ha-
1) and the lowest CH4 emission (789.12kg ha-1) was found from control plot.
Compost fertilizer application significantly affected the plant yield contributing
parameters. The highest grain yield (5.8 t ha-1) and biological yield (13.37 t ha-
1) were found from 20 t ha-1. The highest tiller hill-1(16.31) and harvest index
(43.94) were found from compost @ 50 t ha-1 (T6). The lowest effective tiller
hill-1(10.07), panicle length (10.03 cm), grain yield (4.51 t ha-1) and biological
yield (11.58 t ha-1) were found from control plot. In respect of rice yield and
methane emission, compost @ 20 t ha-1(T4) was found better than other
treatment.
determine noise pollution in different zone of the Jamalpur sadar municipal area in the year of 2014. In total 45 samples
were obtained from 15 locations covering 5 sensitive areas and the measurements were done at morning, afternoon and
evening periods. The Noise level was determined by Sound Level Meter (Multi-function Environmental Meter, Model: ST-
8820). All the studied areas showed higher than maximum allowable noise level where the highest average level of sound
(87.33 dBA) was observed at traffic area during morning hours and lowest average level of sound (54.33 dBA) was
observed at residential area during evening hours. A total of 100 respondents were selected to evaluate respondent’s
perception and effects of noise pollution. In the studied area, main noise source was traffic (57%) where small vehicle like
auto bike and rickshaw were main culprit. Majority of the respondents claimed headache and heart bit problems due to
traffic noise. The proper utilization of traffic enforcement laws was suggested by most of the respondents, driver and public
awareness on noise pollution was also suggested to minimize noise pollution.
on CH4 emission and yield of Aman rice in the experimental field of
Environmental Science at Bangladesh Agricultural University, Mymensingh
during July to November, 2013. The study was conducted with six treatments
of recommended doses of inorganic fertilizer, compost @ 10 t ha-1, 20 t ha-1, 30
t ha-1, 50 t ha-1 and control (without fertilizer). Air samples were collected by
the modified closed-chamber method and analyzed by gas chromatograph
equipped with a Flame Ionization Detector (FID). CH4 emission was influenced
by compost fertilizer application rate. The highest CH4 emission (1655.71kg ha-
1) and the lowest CH4 emission (789.12kg ha-1) was found from control plot.
Compost fertilizer application significantly affected the plant yield contributing
parameters. The highest grain yield (5.8 t ha-1) and biological yield (13.37 t ha-
1) were found from 20 t ha-1. The highest tiller hill-1(16.31) and harvest index
(43.94) were found from compost @ 50 t ha-1 (T6). The lowest effective tiller
hill-1(10.07), panicle length (10.03 cm), grain yield (4.51 t ha-1) and biological
yield (11.58 t ha-1) were found from control plot. In respect of rice yield and
methane emission, compost @ 20 t ha-1(T4) was found better than other
treatment.
determine noise pollution in different zone of the Jamalpur sadar municipal area in the year of 2014. In total 45 samples
were obtained from 15 locations covering 5 sensitive areas and the measurements were done at morning, afternoon and
evening periods. The Noise level was determined by Sound Level Meter (Multi-function Environmental Meter, Model: ST-
8820). All the studied areas showed higher than maximum allowable noise level where the highest average level of sound
(87.33 dBA) was observed at traffic area during morning hours and lowest average level of sound (54.33 dBA) was
observed at residential area during evening hours. A total of 100 respondents were selected to evaluate respondent’s
perception and effects of noise pollution. In the studied area, main noise source was traffic (57%) where small vehicle like
auto bike and rickshaw were main culprit. Majority of the respondents claimed headache and heart bit problems due to
traffic noise. The proper utilization of traffic enforcement laws was suggested by most of the respondents, driver and public
awareness on noise pollution was also suggested to minimize noise pollution.
practices on the soil organic carbon (SOC) and soil total nitrogen (STN) in different
agricultural soils of Mymensigh district located in northern Bangladesh 24°45′14″N
90°24′11″E. The land use types considered were cultivated (single, double and triple
cropped), agroforestry, fallow land and grass land. 32 soil samples were collected
covering above land use types. SOC and STN were significantly varied in different land
use pattern and soil management practices. Among all land use pattern the highest SOC
and STN were found under agroforestry and the lowest was found under fallow land.
Cropping pattern also influenced the SOC accumulation in soil where rice-fallow-rice
cropping pattern had highest SOC accumulation and lowest was found in rice-rice-rice
cropping pattern. Organic carbon dynamics highly regulated by organic fertilizer
application and tillage operation. The carbon to nitrogen (C: N) ratio was affected by
land use systems and the ranges obtained 4.9 to 11.6. The C: N ratio was narrows in
different agricultural land use pattern and higher in agroforestry system. The contents of
total nitrogen was strongly associated (R2 = 0.98) with total organic carbon and
decreased consistently with increasing soil depth under all land use systems. The result
of this study will help to develop future plan about land use and soil management
regarding soil carbon and nitrogen dynamics for better economic returns with
environmental protection.
southern part due to extreme climatological events. Therefore, in this study, we had mainly tried to study on the
variations of temperature, relative humidity (RH) and sunshine hours (SH) in the coastal areas to find out its effect
on the formation of cyclone. Data from 1975-2014 of these climatic variables was provided by the Bangladesh
Meteorological Department (BMD) and analyzed with the statistical tool MS Excel 2010 as per objective of the
study. Results showed that in the16 stations, temperature has shown homogenous trend where it has seen that in all
the stations the Tmean and Tmax were ranging from 180C to 300C and 280C to 420C respectively. In maximum stations,
the Tmax and extreme Tmean has found in the months of April and May which is a cyclone occurring month. Again
RHmax has mostly found in the post monsoon season where RHmean is ranging 84~88% mainly in the Khulna,
Mongla, Khepupara and Barisal areas, may have profound influence on the formation of cyclone especially in this
area. SHmax has found in the month April where the highest was about 12.08 hr. These higher amounts of
temperature play profound influence in increasing temperature in the studied areas which have direct consequences
on cyclone events. So, extreme temperature, RH and SH in these months may had profound influence on the
formation of cyclone. These information could be very useful to the related scientists to study on several extreme
weather events due to variation of temperature especially on cyclogenesis which are a most common devastating
phenomenon for the coastal areas like Bangladesh.
present study was conducted to assess farmer’s perception on climate change and soil carbon sequestration (SCS) in the Ludhua
village under Senbagh upazilla of Noakhali district during November 2012 to February 2013. The study consisted of 94 randomly
selected farmers. It was observed that nearly about 77% respondent realized change in climate and 23% respondent found no
variation in climate; among them 69.5% respondent claimed temperature is increasing. About 55.1% respondent believed man
made activity responsible for extreme event (i.e. flood, cyclone, drought etc) while 38.5% respondent believed nature is the
responsible for extreme event. Most of the respondent (94.7%) found organic farming improves soil health. Crop residues are
important source of soil organic matter which captures soil carbon by the formation of humus. About 86.1% respondent had
concept about crop residue. Majority of the farmer (53.2%) claimed that composting increase soil organic matter. Conservation
agriculture like crop rotation, cropping pattern, conservation, tillage and stubble retention irrigation and fertilization are the main
drivers for SCS. Although most of the (57.2%) farmers had no idea about soil carbon and SCS but they followed various soils
management practices for better crop yield (crop rotation 90.3%, irrigation 98.96% and fertilization 96.8%) which helps to
increase soil organic carbon.