EFFECT OF DIETARY-PROTEIN LEVEL ON THERMOREGULATION, DIGESTION AND WATER ECONOMY IN DESERT SHEEP

被引：7

作者：

AHMED, MMM

ABDELLATIF, AM

机构：

[1] Department of Physiology, Faculty of Veterinary Science, Institute of Animal Production, Khartoum North

来源：

SMALL RUMINANT RESEARCH | 1995年 / 18卷 / 01期

关键词：

SHEEP; CRUDE PROTEIN; THERMOREGULATION; DIGESTION; WATER ECONOMY;

D O I：

10.1016/0921-4488(95)00708-S

中图分类号：

S8 [畜牧、动物医学、狩猎、蚕、蜂];

学科分类号：

0905 [畜牧学];

摘要：

Nine desert rams were allocated in a 3 X 3 Latin square design, to study the effect of increasing dietary crude protein (CP) concentration (9.8, 12.8, 14.7% dry matter (DM)) on thermoregulation, dry matter intake (DMI), digestibility of nutrients, water and N balance, rumen and blood components. Rectal temperature and respiration rate increased with increasing ambient temperature in the afternoon and with increased (P < 0.01) CP content. Evaporative water loss and water turnover rate increased (P < 0.05) in response to treatments. Digestibility of the nutrients (P < 0.01) and liveweight gains (P < 0.05) increased as dietary CP content was increased to 12.8 or 14.7%. Rumen pH decreased (P < 0.01) 3 h post-feeding. Concentration of plasma glucose and free fatty acids were inversely related. There is little information on protein and energy requirements for sheep in tropical versus temperate zones, which this study investigated.

引用

页码：51 / 56

页数：6

共 24 条

[1]

Abou Akkada, Osman, The use of ruminal ammonia and blood urea as an index of the nutritive value of protein in some foodstuff, The Journal of Agricultural Science, 69, pp. 25-31, (1967)

[2]

Ash, Norton, Studies with the Australian Cashmere goat 1 Growth and digestion in male and female goats given pelleted diets varying in protein content and energy level, Australian Journal of Agricultural Research, 38, pp. 957-969, (1987)

[3]

Methods of Analysis, (1980)

[4]

Blaxter, Wainman, Wilson, The regulation of food intake by sheep, Animal Production, 3, pp. 51-61, (1961)

[5]

Bunting, Boling, Macko, Effect of dietary protein level on nitrogen metabolism in growing bovine: 1. Nitrogen recycling and intestinal protein supply in calves, J. Anim. Sci., 67, pp. 810-819, (1989)

[6]

Conway, Microdiffusion Analysis and Volumetric Error, (1957)

[7]

Demiruren, Beheshti, Salimi, Saleh, Djaferi, Comparison of reproductive and productive capacities of sheep of the Kellakull, Kizil, Bakhitiari and Baluchi breeds in Iraq, Tech. Rep. No. 1, (1971)

[8]

Duncombe, The colorimetric microdetermination of non-esterified fatty acids in plasma, Clin. Chem. Acta, 9, pp. 122-128, (1964)

[9]

El-Shazly, Studies on the nutritive value of some common Egyptian feeding-stuffs 1 Nitrogen retention and ruminal ammonia curves, The Journal of Agricultural Science, 51, pp. 149-156, (1958)

[10]

English, Water and electrolyte balance in sheep. 1. External balance of water, sodium, potassium and chlorine, Res. Vet. Sci., 7, pp. 233-257, (1966)

← 1 2 3 →