Effect of replacing Berseem hay by vegetable marketing waste silage in the rations on some productive and physiological traits of lactating cows
Abstract: Twenty four lactating Friesian cows were divided randomly into four similar groups. Cows of the first group were fed on a control ration (R 1) consisted of 50% concentrate mixture (CM), 30% berseem hay (BH) and 20% rice straw (RS), for the other three groups (R2, R3 and R4) 33,66 and 100% of the berseem hay (BH) were replaced by vegetable marketing waste silage (VMWS), respectively.
Results indicated that the contents of DM, CP, CF and ash decreased, while OM, EE and NFE contents increased with increasing the level of VMWS in rations.
The digestion coefficients of DM, OM, EE and NFE (and consequently the TDN value) increased, while the digestion coefficients of CP, CF (and subsequently the DCP value) decreased significantly (P<0.05) with increasing the level of VMWS in the rations. Average daily intakes of DM, TDN, CP and DCP decreased significantly as the level of VMWS in the rations increased. Ruminal TVFA's, blood T3 and cortisol concentrations and alkaline phosphatase activity increased, while ruminal pH value and NH3-N, and blood total protein, albumin, globulin, urea and creatinine concentrations and activity of GOT and GPT decreased significantly (P<0.05) with increasing the level of VMWS in the rations.
The yield of actual milk, 4% fat corrected milk (FCM), fat, lactose and total solids increased significantly (P<0.05) with increasing the level of VMWS up to 66% and decreased afterwards. Fat and lactose contents increased, while protein, total solids, solid not fat and ash contents of milk and the yield of milk protein decreased significantly (P<0.05) with increasing the level of VMWS in the rations. Yield of solid not fat in milk of cows fed 100% VMWS (R4) was significantly lower (P<0.05) compared to those fed R1, R2 and R3 rations..
Daily feed cost decreased, and efficiency of energy and protein utilization as well as feed and economic efficiency increased significantly (P<0.05) with increasing the level of VMWS in the rations. The income of 4% FCM yield increased significantly (P<0.05) with increasing the level of VMWS up to 66% and decreased afterwards.
Blood analysis revealed normal hepatic function and level of hormone associated with energy metabolism.
Keywords: Lactating Friesian cows, vegetable marketing waste silage, digestibility, nutritive values, milk production and composition. blood constituents, rumen liquor parameters.
Publication year 2003
Pages 5957-5967
Availability location معهد بحوث الانتاج الحيوانى-شارع نادى الصيد- الدقى - الجيزة
Availability number
Organization Name
City المنصورة
serial title Journal of Agricultural Science Mansoura University
ISSN 1110-0346
Author(s) from ARC
Agris Categories Animal feeding
AGROVOC
TERMS		 Blood composition. Lactose. Milk fat. Milk protein. Milk yield. Silage.
Proposed Agrovoc Berseem hay;lactating cows;vegetable marketing waste;
Publication Type Journal
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