51 research outputs found
THE EFFECT OF DIFFERENT DOSES OF NITROGEN FERTILIZER (UREA) ON THE INCIDENCE OF SUCKING INSECT PESTS OF RICE
No full textA Thesis
Submitted to the Faculty of Agriculture
Sher-e-Bangla Agricultural University, Dhaka
in partial fulfilment of the requirements
for the degree of
MASTER OF SCIENCE (MS)
IN
ENTOMOLOGY
SEMESTER: JANUARY-JUNE, 2016The experiment was conducted in the experimental area of Sher-e-Bangla Agricultural
University, Sher-e-Bangla Nagar, Dhaka during the period from April to August 2016,
to evaluate the effect of different doses of nitrogen fertilizer (urea) on the incidence of
sucking insect pest of rice. BRRI dhan43 were used as the test crop in this experiment.
The experiment comprised of the following nitrogen doses as treatment- T1 = Top
dressing of Nitrogen fertilizer (urea) @ 50kg/ha at three equal split application; T2 =
Top dressing of Nitrogen fertilizer (urea) @ 60kg/ha at three equal split application; T3
= Top dressing of Nitrogen fertilizer (urea) @ 70kg/ha at three equal split application;
T4 = Top dressing of Nitrogen fertilizer (urea) @ 80kg/ha at three equal split
application; T5 = Top dressing of Nitrogen fertilizer (urea) @ 90kg/ha at three equal
split application and T6 = Untreated control. The experiment was laid out in a
randomized complete block design (RCBD) with three replications. Data was recorded
on insect pest incidence, number of healthy, infested plants, leaf and tillers due to
different insect pests and infestation level and also yield contributing characters and
yield of BRRI dhan43 from different treatments. It was revealed that 3 common species
of sucking insect pests such as brown plant hopper, green leaf hopper and rice bug were
found in rice field. Insect populations for 5 selected hills/plot were observed and
sucking insect pests e.g., brown plant hopper, green leaf hopper and rice bug were
investigated. In case of tillers, leaf and panicle infestation in different crop stages
caused by different rice sucking insect pests, the lowest infestation was recorded from
T3, whereas the highest infestation was observed from T5. In consideration of yield
contributing characters and yield of BRRI dhan43, the maximum number of filled
grains/panicle (93.38%) was recorded from T3, while the minimum number of filled
grains/panicle (73.36%) from T6. The highest grain yield (4.25 t/ha) was recorded from
T3, while the lowest grain yield (1.24 t/ha) was recorded from T6 followed by T5
(2.55t/ha). Among the different nitrogen doses; 70 kg N/ha applied in T3 treatment was
superior to other nitrogen doses
PERCEPTION OF CITY GARDENER TOWARDS ROOFTOP GARDENS FOR CLIMATE REGENERATION
No full textA Thesis
Submitted to the Department of Agricultural Extension and Information System
Sher-e-Bangla Agricultural University, Dhaka
In partial fulfillment of the requirements
for the degree of
AGRICULTURAL EXTENSION AND INFORMATION SYSTEMThe main purpose of this study was to determine the perception of city
gardener towards rooftop gardens for climate regeneration and to explore the
relationship of the selected characteristics of the growers with their perception
towards rooftop gardens for climate regeneration. The selected characteristics
were age, education, family size, rooftop garden size, annual family income,
training exposure, extension media contact, knowledge on rooftop gardening
and problems on rooftop gardening. A list comprised a total of 713 respondents
in the study area (27 and 28 No. Ward, Mohammadpur, Dhaka). These
respondents constituted the population of this study. Fifteen percent (107
respondents) of the population were randomly selected as representative
sample by using a Table of Random Numbers (Kerlinger, 1973). Thus, 107
farm family head constituted the sample of the study. Data were collected
during the period of 1
st
December 2019 to 28 February, 2020. Pearson Product
Moment Correlation test was used to explore the relationships among the
concerned variables. Majority (61.68%) of the respondents had medium
perception towards rooftop gardens for climate regeneration, 31.78 percent had
high perception towards rooftop gardens for climate regeneration and only 6.54
percent had low perception towards rooftop gardens for climate regeneration.
Out of nine selected characteristics of the respondents age, education, annual
family income, training exposure, extension media contact and knowledge on
rooftop gardening had positive significant relationship with their perception
towards rooftop gardens for climate regeneration. And problems on rooftop
gardening had negative significant relationship with their perception towards
rooftop gardens for climate regeneration. No significant relationship was found
with respondents family size and rooftop garden size
THE EFFECT OF DIFFERENT DOSES OF NITROGEN FERTILIZER (UREA) ON THE INCIDENCE OF SUCKING INSECT PESTS OF RICE
No full textA Thesis
Submitted to the Faculty of Agriculture
Sher-e-Bangla Agricultural University, Dhaka
in partial fulfilment of the requirements
for the degree of
MASTER OF SCIENCE (MS)
IN
ENTOMOLOGY
SEMESTER: JANUARY-JUNE, 2016The experiment was conducted in the experimental area of Sher-e-Bangla Agricultural
University, Sher-e-Bangla Nagar, Dhaka during the period from April to August 2016,
to evaluate the effect of different doses of nitrogen fertilizer (urea) on the incidence of
sucking insect pest of rice. BRRI dhan43 were used as the test crop in this experiment.
The experiment comprised of the following nitrogen doses as treatment- T1 = Top
dressing of Nitrogen fertilizer (urea) @ 50kg/ha at three equal split application; T2 =
Top dressing of Nitrogen fertilizer (urea) @ 60kg/ha at three equal split application; T3
= Top dressing of Nitrogen fertilizer (urea) @ 70kg/ha at three equal split application;
T4 = Top dressing of Nitrogen fertilizer (urea) @ 80kg/ha at three equal split
application; T5 = Top dressing of Nitrogen fertilizer (urea) @ 90kg/ha at three equal
split application and T6 = Untreated control. The experiment was laid out in a
randomized complete block design (RCBD) with three replications. Data was recorded
on insect pest incidence, number of healthy, infested plants, leaf and tillers due to
different insect pests and infestation level and also yield contributing characters and
yield of BRRI dhan43 from different treatments. It was revealed that 3 common species
of sucking insect pests such as brown plant hopper, green leaf hopper and rice bug were
found in rice field. Insect populations for 5 selected hills/plot were observed and
sucking insect pests e.g., brown plant hopper, green leaf hopper and rice bug were
investigated. In case of tillers, leaf and panicle infestation in different crop stages
caused by different rice sucking insect pests, the lowest infestation was recorded from
T3, whereas the highest infestation was observed from T5. In consideration of yield
contributing characters and yield of BRRI dhan43, the maximum number of filled
grains/panicle (93.38%) was recorded from T3, while the minimum number of filled
grains/panicle (73.36%) from T6. The highest grain yield (4.25 t/ha) was recorded from
T3, while the lowest grain yield (1.24 t/ha) was recorded from T6 followed by T5
(2.55t/ha). Among the different nitrogen doses; 70 kg N/ha applied in T3 treatment was
superior to other nitrogen doses
High levels of genetic variability and differentiation in hilsa shad, Tenualosa ilisha (Clupeidae, Clupeiformes) populations revealed by PCR-RFLP analysis of the mitochondrial DNA D-loop region
No full textThe hilsa shad, Tenualosa ilisha (Clupeidae, Clupeiformes) is an important anadromous clupeid species from the Western division of the Indo-Pacific region. It constitutes the largest single fishable species in Bangladesh. Information on genetic variability and population structure is very important for both management and conservation purposes. Past reports on the population structure of T. ilisha involving morphometric, allozyme and RAPD analyses are contradictory. We examined genetic variability and divergence in two riverine (the Jamuna and the Meghna), two estuarine (Kuakata and Sundarbans) and one marine (Cox's Bazar) populations of T. ilisha by applying PCR-RFLP analysis of the mtDNA D-loop region. The amplified PCR products were restricted with four restriction enzymes namely, XbaI, EcoRI, EcoRV, and HaeIII. High levels of haplotype and gene diversity within and significant differentiations among, populations of T. ilisha were observed in this study. Significant F ST values indicated differentiation among the river, estuary and marine populations. The UPGMA dendrogram based on genetic distance resulted in two major clusters, although, these were subsequently divided into three, corresponding to the riverine, estuarine and marine populations. The study underlines the usefulness of RFLP of mtDNA D-loop region as molecular markers, and detected at least two differentiated populations of T. ilisha in Bangladesh waters
Prototyping of Human Spare Parts with 3D Printing
No full text3D printing technology is a leading technology for producing 3D virtual shape product. It is getting more popular by its accuracy and three dimensional objects. The objective of thesis work is to present a technology review on additive manufacturing processes and to produce prototypes of human spare parts such as organs by using 3D printer. Fused deposition modeling additive manufacturing process is used for prototyping of human organs. Human organs are designed by solid modeling software. Thermoplastic polymer materials like polylactic acid, acrylonitrile butadiene styrene and nylon are used in this process. The Author concludes that fused deposition modeling additive manufacturing process can be simplified by bio printer additive manufacturing process. Human living cell and biomaterial can be used as a material in this process. Organs can be designed by solid modeling software. The scheme is to explore 3D printing technology for producing human artificial organs for saving thousands lives. Further experiment is necessary for functional and clinical use of printed organs
A feasibility study of mini hydroelectric power plant at Sahasradhara waterfall, Sitakunda, Bangladesh
No full textAnaerobic co-digestion of sewage sludge and food waste as a promising alternative for waste management and energy production
No full textBiogas is an economical and environmentally friendly renewable energy which can be produced by anaerobic digestion (AD). This biochemical method converts organic compounds (mainly from wastes) into a sustainable source of energy. Anaerobic co-digestion (AcoD) is a method combining more than one substrate to resolve the difficulties faced in a single substrate AD system. Solid wastes increases as the population increase so do the urbanization and industrial industries. Food waste and sewage sludge are examples of one of the solid wastes. Co-digesting of both substrates may improve process stabilization to increase biogas production and overcome the nutrients imbalance. Thus, anaerobic co-digestion has been recognized as a technology that could provide a clean renewable energy source and helps reduce the landfill problem. The objective of this paper is to investigate the recent achievements and perspectives on the interaction of co-digestion between food waste and sewage sludge to improve biogas production. This may provide valuable information on the optimization of combinations of substrates: food waste and sewage sludge and prediction of bioreactor performance
Anaerobic co-digestion of sewage sludge and food waste as a promising alternative for waste management and energy production
No full textBiogas is an economical and environmentally friendly renewable energy which can be produced by anaerobic digestion (AD). This biochemical method converts organic compounds (mainly from wastes) into a sustainable source of energy. Anaerobic co-digestion (AcoD) is a method combining more than one substrate to resolve the difficulties faced in a single substrate AD system. Solid wastes increases as the population increase so do the urbanization and industrial industries. Food waste and sewage sludge are examples of one of the solid wastes. Co-digesting of both substrates may improve process stabilization to increase biogas production and overcome the nutrients imbalance. Thus, anaerobic co-digestion has been recognized as a technology that could provide a clean renewable energy source and helps reduce the landfill problem. The objective of this paper is to investigate the recent achievements and perspectives on the interaction of co-digestion between food waste and sewage sludge to improve biogas production. This may provide valuable information on the optimization of combinations of substrates: food waste and sewage sludge and prediction of bioreactor performance
Effect of Stocking Density, Multispecies Probiotics, and Biofloc on Metabolic and Physiological Responses of Puntius sophore in Laboratory Conditions
No full textA 60-day experimental trial was conducted to evaluate the effect of different stocking densities, probiotic supplementation, and a biofloc system on the growth and physiological responses of Puntius sophore in laboratory conditions. P. sophore (8.64 ± 1.24 g) was obtained from the Brahmaputra River, Mymensingh, and immediately transferred to a flow-through water system. In experiment 1, fish were subjected to three treatments (20 fish per 400 L as LD, 25 fish per 400 L as MD, and 30 fish per 400 L as HD), and similarly, in experiment 2, three different types of diets were provided (control diet (D1), biofloc (D2), and a probiotic-containing diet (D3)). Three replications were used in the completely randomized experimental design. Growth parameters, viz. TLG, BWG, FCR, FCE, SGR, RGR, and DGR, were significantly influenced by stocking density and probiotics (p < 0.05). The highest growth rate was observed in LD and in D3. The lowest FCR was also observed in LD and in D3, while highest was in HD (30 fish per 400 L) and in D2. Though stocking density does not impact the blood profile, with the exception of WBC, in the case of feeding regime, WBC, RBC, MCV, MCH, and PLT levels differed significantly (p < 0.05); however, all haematological measures were within the normal range in both experiments, and the fish’s physiological conditions were better in LD and feeding with probiotic supplementation (D3). The results obtained from this study suggested that the welfare of P. sophore is adversely affected by high stocking density and increased growth and physiological conditions when cultured with LD and supplemented with probiotics
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