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MILK UREA AND LACTOSE AS INDICATORS OF THE PROTEIN AND ENERGY STATUS IN LACTATING EWES AND GOATS

Bed, Sándor Nagy, Zoltán
Nikodémusz, Etelka Délborsod Co-operative for
Institute of Animal Husbandry Fish and Sheep-Farming
Gödöll University of Agricultural Sciences Gelej, Hungary
Gödöll, Hungary
Seregi, János
Experimental Farm of the
University of Veterinary Sciences
Üll-Dóra Major, Hungary

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ABSTRACT

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INTRODUCTION

MATERIAL AND METHODS

After the suckling period, animals were machine-milked twice daily. Evening and morning milk samples were individually taken and milk yields recorded at 4-week intervals. Milk samples were analysed for solid composition, including urea, and somatic cell counts using a Foss-Electric System 4000. Blood samples were also taken and analysed for urea and glucose by spectro-photometry using REANAL test kits of cat. No. 11532 and 07239, respectively. Circulating leukocyte count was also determined.

RESULTS AND DISCUSSION


Figure 1. Variation in urea concentrations in milk and plasma of ewes
and goats during lactation


Figure 2. The urea concentration in the morning and evening milk of ewes and goats



Figure 3. Variation in lactose and plasma glucose levels of ewes and goats during lactation



Figure 4. Variation in milk yields of ewes and goats and in dietary P/E ratio during lactation



Figure 5. Variation in lactose level of ewe's and goat's milk and NDF content during lactation

REFERENCES

Andersson, L. & Lundström, K. 1984. Effect of energy balance on plasma glucose and ketone bodies in blood and milk and influence of hypoketonemia on milk production in postparturient dairy cows. In: Zbl. Vet. Med. A 31: 539-547.
Bed, S.- Nikodémusz, E.- Gundel, K. & Nagy, Z. 1997. Relations of plasma concentrations of urea, glucose and total protein to milk levels of urea, lactose and protein of grazing ewes during lactation. In: Arch. Tierz., Dummerstorf 40: 265-275.
Bruckental, I.- Andersson, L. & Carlström, G. 1986. Determination of milk urea by flow injection analysis. In: J. Vet. Med. A 33: 53-58.
Carlsson, J.- Bergström, J. & Pehrson, B. 1995. Variations with breed, age, season, yield, stage of lactation and herd in the concentration of urea in bulk milk and individual cow's milk. In: Acta Vet. Scand. 36: 245-254.
Carlsson, J. & Pehrson, B. 1994. The influence of the dietary balance between energy and protein on milk urea concentration. Experimental trials assessed by 2 different protein evaluation systems. In: Acta Vet. Scand. 35: 193-205.
Goering, H. K. & Van Soest, P. J. 1970. Forage Fiber Analyses (Apparatus, Reagents, Procedures, and Some Applications). In: Agric. Handbook. No. 379. ARS-USDA, Washington, DC.
Kállai, I. & Kralovánszky, U. P. 1975. Biology of Meat and Milk Production (in Hungarian). Mezgazdasági Kiadó, Budapest, 1975, 201-207.
Magdus, M.- Fekete, S.- Frenyó, L. V- Miskucza, O. & Kotz, L. 1988. Milk production and certain parameters of energy metabolism in dairy cows fed rations of varying energy and crude protein contents and fat. In: Acta Vet. Hung. 36: 43-59.
Miettinen, H. & Huhtanen, P. 1989. The concentrations of blood metabolites and the relations between blood parameters, fatty acid composition of milk and estimated ME-balance in dairy cows given grass silage ad libitum with five different carbohydrate supplements. In: Acta Agric. Scand., Stockholm 39: 319-330.
Miettinen, P. V. A. & Juvonen, R. O. 1990. Diurnal variations of serum and milk urea levels in dairy cows. In: Acta Agric. Scand. 40: 289-296.
Oltner, R. & Wiktorsson, H. 1983. Urea concentrations in milk and blood as influenced by feeding various amounts of protein and energy to dairy cows. In: Livestock Prod. Sci., Amsterdam 10: 457-467.
Rowlands, G.J. 1980. A review of variations in the concentrations of metabolites in the blood of beef and dairy cattle associated with physiology, nutrition and disease, with particular reference to the concentration of metabolic profile. In: World. Rev. Nutr. Diet. 35: 172-235.
Tadich, N.- Wittwer, F.- Gallo, C.& Jorquera, M. 1994. Efecto de un programa de salud en ovinos sobre la condition corporal y los valores sanguines de B-hidroxibutirato, hematocrito y urea. In: Arch. Med. Vet. 26: 43-50.

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