Milk Production in Lactating Buffalo Receiving Recombinantly Produced Bovine Somatotropin

Abstract

Thirty healthy Murrah buffalo (Bubalus bubalis) in their second to fourth lactations were selected from the herd at the National Dairy Research Institute, Karnal, Haryana, India, for use in a 35-d study to determine the effects of recombinantly produced bovine somatotropin on milk production, milk composition, and dry matter intake. Treatments were daily injections of 0, 25, or 50 mg somatotropin per animal for 14 d. All buffalo consumed green chopped fodder ad libitum plus a predetermined quantity of concentrate mixture to each animal, based on individual milk production during the 14-d pretreatment period. The quantity of concentrate mixture fed to each buffalo was not altered during the study. Net increase in milk volume for groups receiving 25 and 30 mg somatotropin was 16.8 and 29.5% over controls. Milk composition, DM intake, and body weights were not affected by treatment.

Milk production and hormonal changes in Murrah Buffaloes administered recombinant Bovine Somatotropin (rBST)

“….Administration of rBST in doses of 25 and 50 mg/day i.m. for 14 days increase milk production without affecting fat and protein (Ludri et al, 1989) contrary to increased fat, protein and lactose observed in this study. The reasons of such short term treatment on milk composition of buffaloes require further investigation as milk composition is influenced by energy balance and mobilization of body reserves (Eppard et al, 1985;Peel et al, 1982 andTyrrell et.…”

Effect of Bromocryptine on hormones and milk secretion in Murrah buffaloes (Bubalus bubalis)

“…Further, IGF-I role as an independent hormone in milk secretion in absence of PRL (inhibition) was not found, although both GH and IGF-I acts synergistically with PRL hormone. The role of GH as a galactopoietic hormone is well established in buffaloes (Ludri et al, 1989;Singh and Ludri, 1994), however, this study confirm that GH and PRL are required for normal milk secretion in buffaloes. Further studies are required to be carried out to explore the mode of action of GH on mammary gland in absence of plasma PRL.…”

Influência da aplicação da somatotropina recombinante bovina (rBST) no lipidograma e composição do leite de bubalinos da raça Murrah em lactação

“…Com relação às pesquisas sobre o uso da somatotropina recombinante bovina em outras espécies ruminantes foi relatado que a rBST é biologicamente ativo em ovinos (BAUMAN, 1992), em caprinos (KNIGHT et al, 1990;PROSSER et al, 1991;DISENHAUS et al,1995) e em búfalas (LUDRI et al, 1989;POLIDORI et al, 1997, SRINIVASA-RAO & RANGANADHAM, 2000JORGE et al, 2002).…”

“…Com relação aos outros constituintes do leite como contagem de células somáticas, teor de lactose do leite e sólidos totais, os trabalhos estão em consenso quando afirmam não haver influência do tratamento sobre nenhum dos constituintes do leite, bem como seu uso na fabricação de queijos e derivados lácteos não sofre qualquer alteração (FERRARA et al, 1989;LUDRI et al, 1989;BALDI, 1999;JORGE et al, 2002;ABO EL-NOR et al, 2007).…”