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You are here » RESEARCH » ON-GOING PROJECTS
On-going Research
Epidemiology on bovine mastitis
Effect of temperature and humidity on bull fertility
Ultrasound and ELISA to improve fertility in cattle and buffalo
Forage production and conservation
Fertility improvement in water buffaloes
Fertilization of zebu cattle oocytes in-vitro
 
Epidemiology of bovine mastitis
 
A study on “Identification of Causes and Risk Factors of Bovine Mastitis for Developing Surveillance Tools” has been carried out in four areas viz., Sirajgonj, Satkhira, Chittagonj and Mymensingh by a PhD student. In Chittagonj, thirty nine percent cows were found affected with mastitis where sub-clinical mastitis was more frequent. The epidemiological study revealed that increase number of lactating cows in a farm influenced the incidence of mastitis. On the other hand, dry floor condition and cleanliness of udder reduced the incidence of mastitis. The bacteriological culture of milk revealed that only 5% mastitis caused by Staph. aureus and 40% by Streptococcus. The antibiotic sensitivity revealed that Cephalexin was the most effective drug against all bacteria and Gentamicin was more effective against Staph. aureus and Coliform organism.
 
Effect of temperature and humidity on bull fertility
 
A PhD research work titled “Fourier Harmonic Analysis of Sperm Nuclear Shape Images to Identify Age and Heat-Stress Related Effects on the Fertilizing Capacity of Crossbred Bull Spermatozoa” has been conducting to see the heat stress effect on regularly collecting bulls. The objectives of this study are (i) to evaluate the sperm head shape images using Fourier Harmonic analysis of young bulls in relation to age at puberty and scrotal circumference, (ii) determination of temperature and humidity effects on crossbred dairy bull sperm shape and post-thaw viability under Bangladesh condition and (iii) effects of environmental heat-stressed bull semen on fertilization and embryo development in vitro.
 
Ultrasound and ELISA to improve fertility in cattle and buffalo
 
Another PhD research work titled “Improving fertility of cattle and buffalo using ultrasonography and ELISA in smallholders’ dairy farm” has been implementing in the project area. The objectives of this research work are (i) to identify the open cows at the earliest possible time after breeding by using milk progesterone ELISA and ultrasonography, (ii) Application of milk progesterone ELISA and ultrasonography as a tool for diagnosis of reproductive diseases, their treatment with GnRH or PGF2 alfa or both and monitoring of treatment outcome, (iii) Reproductive management of postpartum dairy cows by nutrition and reproductive hormones.
 
Forage production and conservation
 
A research work entitled “Forage production, conservation and its evaluation as feed for cattle in smallholders’ dairy farms” has been conducting to overcome the scarcity of forages and to develop low cost forage conservation technique for dairy cattle production. Different combinations of N and P fertilizer have been applying on three (maize, napier and jumbo) high yielding potential forages to increase total forage biomass. Maize forage biomass yield was increased (P<0.01) with the increasing levels of N fertilizer from 50 to 150 kg/ha and P fertilizer from 10 to 30 kg/ha. Similarly, chemical composition (OM and CP) and nutritive value (IVOMD and ME) were increased (P<0.01) also. In addition to maize forage, total biomass, dry matter (DM), organic matter (OM) and crude protein (CP) yields of napier forage were increased P<0.01) with the increasing levels of N fertilizer from 40 to 120 kg/ha. Depending on the silage fermentation characteristics the most suitable method for forage conservation was Bamboo Fenced Chamber (BFC) as a silo. The mean pH value for silage samples of BFC, SFB (synthetic fibre bag) and Concrete silo were 4.11, 4.42 and 4.62 respectively and the values were significantly (P<0.05) different from each other.
 
Fertility improvement in water buffaloes
 
‘Introduction of OvSynch for Fertility Improvement in Water Buffaloes by Manipulating Ovarian Functions Guided by Hormone Assay and Ultrasonography’ is being carried out by an MS student at Kanihari Union belongs to Mymensingh District. The reason behind this study is that farmers can detect only 30% of oestrous animals against a goal of 80-90% to maintain the farm at profit. That means, a technology might be applied to bred cows overcoming the need for oestrus detection. This technology is called ovulation synchronization, Ovsynch in short. The objective of this study is to apply progesterone assay and ultrasonography for breeding suboestrus and anoestrus buffaloes independent of oestrus detection at preset time with good conception rate (50-60%) during a period of one year reproductive cycle.
 
Fertilization of zebu cattle oocytes in-vitro
 
In Vitro Fertilization of local zebu cattle oocytes is an on-going research work of CDVSF laboratory. This technique has not yet been established in Bangladesh. We are trying to develop in vitro embryo in our laboratory and we already made a noticeable improvement confirming 80% in vitro fertilization. In vitro embryo development and transfer to the recipient will definitely contribute to rapid increasing F1 generation cows which are considered to be more suitable for milk production.
 
 
 
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