Influence of Bovine Somatotropin and Replacement of Corn Dextrose with Concentrate on the Performance of Mid-Lactating Buffaloes Fed Urea-Treated Wheat Straw

The study examined the effect of bovine somatotropin (bST) in mid-lactating Nili-Ravi buffaloes (n = 18) given varying levels of Enzose (corn dextrose) in a urea-treated wheat straw (UTWS) based ration on nutrient intake, digestibility, nitrogen (N) utilisation, milk yield, and its composition in a completely randomised design with a 2 x 3 factorial arrangement. The control ration contained 60% UTWS and 40% concentrate. The other 2 rations were formulated to replace 50% or 100% concentrate portions of the ration with Enzose of equivalent energy. Enzose is a liquid derived from the enzymatic conversion of corn starch to dextrose, and is light amber in colour. These rations were offered to buffaloes administered 0 or 250 mg bST, biweekly, for a period of 100 days. The bST administration increased (P < 0.05) dry matter (DM), crude protein (CP), nitrogen (N) retention, neutral detergent fibre (NDF), and acid detergent fibre (ADF) intakes. Buffaloes fed a ration containing 50% Enzose as replaced by concentrate had higher DM, CP, NDF, and ADF intakes than those fed 100% Enzose. The NDF and ADF digestibilities, daily milk yield, and milk fat% were also increased by bST administration while the reverse was true for buffaloes fed replacement of 100% concentrate. Overall N balance was not affected either by bST administration or Enzose addition to the ration. Enzose interacted (P < 0.05) with bST for milk yield and milk ash contents. The bST administration in buffaloes increased milk production by 37%. Up to 50% concentrate can be replaced with Enzose in the ration.

Anahtar Kelimeler:

Bovine somatotropin, Enzose, digestion, intake, milk, nitrogen balance, buffalo

Influence of Bovine Somatotropin and Replacement of Corn Dextrose with Concentrate on the Performance of Mid-Lactating Buffaloes Fed Urea-Treated Wheat Straw

Keywords:

Bovine somatotropin, Enzose, digestion, intake, milk, nitrogen balance, buffalo,

PDF

___

Sarwar, M., Khan, M.A., Iqbal., Z.: Feed resources for livestock in Pakistan. Int. J. Agri. Biol., 2002; 4: 186-192. 2. Sarwar, M., Khan, M.A., Nisa, M., Iqbal., Z.: Dairy industry in Pakistan: a scenario. Int. J. Agri. Biol., 2002; 4: 420-428. 3.
Sarwar, M., Nisa, M., Hussan, Z., Shahzad, M.A.: 2006. Influence
of urea molasses treated wheat straw fermented with cattle
manure on chemical composition and feeding value for growing
Eppard, P.J., Bauman, D.E., Curtis, C.R., Erb, H.N., Lanza, G.M., DeGeeter, M.J.: Effect of 188-day treatment with somatotropin on health and reproductive performance of lactating dairy cows. J. Dairy Sci., 1987; 70: 582-591
Bauman, D.E.: Regulation of nutrient partitioning: homeostasis, homeorhesis and exogenous somatotropin," keynote lecture in: Seventh International Conference on Production Diseases in Farm Animals, F.A. Kallfelz (ed.) Ithaca, NY: Cornell University pp. 1989; 306-323.
Van Soest, P.J., Robertson, J.B., Lewis, B.A.: Methods of dietary fiber, neutral detergent fiber and non-starch polysaccharides in relation to animal nutrition. J. Dairy Sci., 1991; 74: 3583-3597.
NRC: Nutrient Requirements of Dairy Cattle. 7threvised edition. 2001. National Academy Press, Washington, D.C.
AOAC: Official Methods of Analysis. Association of Analytical Chemists, 15th Ed. Arlington Virginia, 1990. USA.
Nisa, M., Sarwar, M., Khan, M.A.: Influence of ad libitum feeding of urea-treated wheat straw with or without corn steep liquor on intake, in situ digestion kinetics, nitrogen metabolism, and nutrient digestion in Nili-Ravi buffalo bulls. Aust. J. Agri. Res., 2004; 55: 229-236.
Steel, R.G.D., Torrie, J.H.: Principles and Procedures of Statistics. A Biometrical Approach (2ndEd).1984. McGraw-Hill Book Co. Inc., New York, USA.
Vallimont, J.E., Varga, G.A., Arieli, A., Cassidy, T.W., Cummins, K.A.: Effects of prepartum somatotropin and monensin on metabolism and production of periparturient Holstein dairy cows. J. Dairy Sci., 2001; 84: 2607-2621.
Poore, M.H., Moore, J.A., Eck, T.P., Theurer, C.B.: Effect of fiber source and ruminal starch degradability on site and extent of digestion in dairy cows. J. Dairy Sci., 1993; 76: 2244-2253.
Yu, P.: Effect of corn grain processing on lactational performance, nutrient utilization and metabolism in dairy cows. PhD Dissertation, 1996. Univ. Arizona, Tucson.
Grantley-Smith, M.P., Oldham, J.D., Hart, I.C.: Effect of growth hormone and anabolic steroids on N retention and dynamics of urea metabolism in young Friesian steers. In: Amal M (Ed.) Proceedings of IVth International Symposium on Protein Metabolism and Nutrition. INRA, Clermont-Ferrand, France., 1983. p-161.
Mehra, U.R., Dass, R.S., Verma, A.K., Sahu, D.S.: Effect of feeding urea and acetic acid treated wheat straw on the digestibility of nutrients in adult male Murrah buffaloes. Asian- Aust. J. Anim. Sci., 2001; 14: 1690-1695
Sarwar, M., Khan, M.A., Nisa, M., Khan, M.S.: Feeding value of urea treated corncobs ensiled with or without enzose (corn dextrose) for lactating cross-bred cows. Asian Aust. J. Anim. Sci., 2004; 17: 1093-1097.
De Boar, G., Kennelly, J.J.: Effect of somatotropin injection and dietary protein concentration on milk yield, and kinetics of hormones in dairy cows. J. Dairy Sci., 1989; 72: 419-428.
Pocius, P.A., Herbein, J.H.: Effects of in vivo administration of growth hormone on milk production and in vitro hepatic metabolism in dairy cattle. J. Dairy Sci., 1986; 69: 713-720.
Soderholm, G.C., Otterby, D.E., Linn, J.G., Ehle F.R., Wheaton, J.E., Hansen, W.P., Annexstad, J.R.: Effects of recombinant bovine somatotrophin on milk production, body composition and physiological parameters. J. Dairy Sci., 1988; 71: 355-365.
Eppard, P.J., Bauman, D.E., McCutcheon, S.N.: Effect of dose of bovine growth hormone on lactation of dairy cows. J. Dairy Sci., 1985; 68: 1109-1115.
McBride, B.W., Bruton, J.L., Bruton, J.H., McLeod, G.K., Eggert, R.: Multi lactational treatment effects of rbST on production responses in lactating Holstein cows. J. Dairy Sci., 1989; 72: (supplement 1): 430. (Abstract)
Capuco, A.V., Wood, D.L., Elsasser, T.H., Kahl, S., Erdman, R.A., Van Tassel, C.P., Lefcourt, A., Piperova, L.S.: Effect of somatotropin on thyroid hormones and cytokines in lactating dairy cows during ad libitum and restricted feed intake. J. Dairy Sci., 2001; 84: 2430-2439.