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Articles by B. Roy
Total Records ( 4 ) for B. Roy
  K. Chattopadhyay , M.K. Mondal and B. Roy
  An experiment was conducted to determine the comparative efficacy of DL-methionine and herbal methionine on performance and carcass characteristics of broiler chickens. Two thousand and four hundred d-old commercial broiler (VenCobb) chicks were purchased and randomly divided into four dietary treatment groups of 600 birds each. Each treatment group was further subdivided into three replicates of 200 broilers per replicate. The treatments groups were control; control plus 10g DL-methionine/kg diet; control plus 10g herbal methionine (Herbomethion®, supplied by Indian Research and Supply Co. Ltd.) /kg diet and control plus 15g herbal methionine/kg diet. There were significant effects of dietary treatments on body weight, body weight gain, feed intake and feed conversion ratio at 0 to 41 day. The body weight and body weight gain of the broilers fed the 15g herbal methionine/kg diet were heavier than other treatments. Feed conversion ratio of broiler fed 15g herbal methionine/kg diet was significantly better than that of broilers fed on 10g herbal methionine or DL-methionine/kg diet. Neither DL-methionine nor herbal methionine supplementation had a significant effect on broiler mortality. Plasma protein and enzyme concentration was unaffected by the dietary treatments. Abdominal fat (%) and liver lipid (g/kg) was significantly decreased by the addition of 15g herbal methionine/kg diet. This study demonstrates that herbal methionine can replace DL-methionine very effectively when used at the rate 15g/kg diet of commercial broiler chicken.
  P.K. Das , P.R. Ghosh , B. Roy and D. Mazumdar
  Family poultry is presently considered as a Special Programme for Food Security particularly at the developing countries in the world. In this outset, a study was conducted on 60000 Rhode Island Red (RIR) birds by twenty four major treatment types to identify the best combination of major inputs viz. age of birds, initial supply of concentrated feed upto grower stage followed by supplementation of ration produced by the farmers using locally available ingredients along with run space to develop a model on backyard poultry production system under scavenging at five agroclimatic zones in West Bengal, India where largest Poultry Distribution Scheme of world were implemented. Twenty one variables under three major criteria viz. production and physiological, economical and adoption of technology were considered as vital effect using factor analysis and linear indexing technique. The result showed that 21 day old bird may to be selected for sustainable backyard poultry farming through Rhode Island Red breed at all agroclimatic zone under study. It was shown that a run space of above 20 sq ft per bird with the provision of 50% quantity of commercial poultry ration as per their requirement before laying followed by supplementary feed having 10.01-15.00 g crude protein per day ranked first among 24 treatment groups. The best agroclimatic zone for backyard poultry farming is coastal zone. The best possible combination of input and supportive factor for economic backyard poultry farming at farmers’ doorstep of various agroclimatic zones was also analyzed.
  B. Roy , R. Amin , M.N. Uddin , A.T.M.S. Islam , M.J. Islam and B.C. Halder
  Two experiments were conducted in the laboratory with leaves of one plant species (Blumea lacera Dc.) Shiyalmutra or Kukurshunga for studying their repellency and toxicity test against the lesser grain borer (Rhyzopertha dominica F.) and rice weevil (Sitophilus oryzae L.; Bastrychidae:Coleoptera) with the attempt for chemical investigation of each extract. In the first experiment petroleum ether extract of dried leaves (1, 2 and 3% by volume) were used on the adult beetle of lesser grain borer and rice weevil to evaluate their repellency for mortality/direct toxicity effects. Results for the two experiments indicated that 1, 2 and 3% petroleum ether extract of leave of Blumea lacera Dc. species had repellency as well as direct toxicity, while 3% showed strong repellency and toxicity effects among the other extracts on both lesser grain and rice weevil.
  G. Halder , G. Samanta , S. Mondal , B. Roy , K.C. Dhara and S. Koley
  An experiment was conducted to find out the effect of excess methionine and methionine-betaine supplementation on deposition of arsenic in different tissues, organs and eggs of hen and contribution of hen egg and meat to human health hazard along with the arsenic contaminated drinking water. One hundred twenty Rhode Island Red, 16 week-old, were allocated into four groups having three replicates with nine hens and one cock in each replicate. The experimental groups were C (control group fed with basal diet only), T1 (fed control diet with 5.5 ppm arsenic through water), T2 (fed control diet with 5.5 ppm arsenic through water + 50 g methionine per 100 kg of feed) and T3 (fed same as T2 but 50% of the excess methionine supplement was replaced with betaine). The birds were maintained in deep litter system of housing. Statistical analysis confirmed that the concentration of arsenic in different organs, tissues and eggs were varied significantly (p< 0.01) due to dietary treatments. The long term intake of such arsenic contaminated hen eggs and meat by human being may act as some contributory factor to suffer from the serious health hazard. Statistical analysis confirmed that the concentration of arsenic (As) in various organs, tissues and eggs was significantly (p< 0.01) reduced due to supplementation of methionine and methionine-betaine in T2 and T3 groups, respectively as significantly (p< 0.01) larger amount of arsenic was voided through faeces in T2 and T3 groups than T1 group where no excess methionine or betaine was added in diet. So it may be concluded that supplementation of either methionine or methionine-betaine combination may able to protect the chronic arsenic toxicity during exposure of As in laying hen.
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