METABOLIC RESPONSES TO PROTEIN SUPPLEMENTATION AND SLAFRAMINE IN GOATS AND SHEEP FED ROUGHAGE

被引：8

作者：

GASKINS, HR ^{[1
]}

CROOM, WJ ^{[1
]}

FERNANDEZ, JM ^{[1
]}

VANEYS, JE ^{[1
]}

HAGLER, WM ^{[1
]}

JOHNSON, WL ^{[1
]}

机构：

[1] N CAROLINA STATE UNIV,DEPT ANIM SCI,BOX 7621,RALEIGH,NC 27695

来源：

SMALL RUMINANT RESEARCH | 1991年 / 6卷 / 1-2期

关键词：

D O I：

10.1016/0921-4488(91)90010-N

中图分类号：

S8 [畜牧、动物医学、狩猎、蚕、蜂];

学科分类号：

0905 ;

摘要：

Eighteen grade Angora goats (BW 14 kg) and 18 Barbados Blackbelly x Dorset sheep (BW 24 kg), all wethers, were fed coastal bermudagrass hay (84% neutral detergent fiber, 6% crude protein) supplemented with alfalfa hay or cotton seed meal during an 84-day feeding trial. On day 28, daily treatment with slaframine (SF; 30-mu-g kg-1 BW), a parasympathomimetic with high affinity for the gastrointestinal tract, or physiological saline was initiated. On day 70, blood samples were obtained at hourly intervals for analyses of glucose (GLU), nonesterified fatty acids (NEFA), urea nitrogen (PUN), insulin (INS), glucagon (GLN), thyroxine (T4), and triiodothyronine uptake (T3U). Plasma concentrations of GLU, NEFA and PUN did not differ between species. Goats had higher (P < 0.05) concentrations of INS, T3, and lower percentage T3U than sheep. The INS to GLN ratio (I/G), was also greater (P < 0.05) in goats. SF increased (P < 0.05) GLU and NEFA and decreased (P < 0.01) PUN. INS tended to decrease and GLN to increase in response to SF, resulting in a lower (P < 0.05) I/G. SF increased (P < 0.05) T4 concentrations and lowered (P < 0.05) the percentage T3U. Protein supplementation increased (P < 0.01) PUN concentrations without affecting plasma concentrations of GLU and NEFA. Plasma concentrations of INS and GLN did not change in response to protein supplementation, while metabolite and hormonal changes were minimal, but SF administration resulted in major changes in blood metabolite and hormone profiles.

引用

页码：73 / 84

页数：12

共 30 条

[1]

Bartlett, Wilson, Croom, Broquist, Hagler, Slaframine and swainsonine production by Rhizoctonia leguminicola: strain comparison, Biodeterioration Research, I, pp. 135-148, (1987)

[2]

Bassett, Weston, Hogan, Dietary regulation of plasma insulin and growth hormone concentrations in sheep, Aust. J. Biol. Sci., 24, pp. 321-330, (1971)

[3]

Bassett, Dietary and gastro-intestinal control of hormones regulating carbohydrate metabolism in ruminants, Digestion and Metabolism in the Ruminant, pp. 383-398, (1975)

[4]

Bloom, Edwards, The release of pancreatic glucagon and inhibition of insulin in response to stimulation of the sympathetic innervation, J. Physiol., 253, pp. 157-173, (1975)

[5]

Bloom, Edwards, The role of the parasympathetic system in the control of insulin release in the conscious calf, J. Physiol., 314, pp. 23-25, (1981)

[6]

Blum, Gingins, Vitins, Bickel, Thyroid hormone levels related to energy and nitrogen balance during weight loss and regain in adult sheep, Acta Endocrinol., 93, pp. 440-456, (1980)

[7]

Blum, Schnyder, Kuntz, Blom, Bickel, Schurh, Reduced and compensatory growth: endocrine and metabolic changes during food restriction and refeeding in steers, J. Nutr., 115, pp. 417-424, (1985)

[8]

Brockman, Roles of glucagon and insulin in the regulation of metabolism in ruminants — a review, Can. Vet. J., 19, pp. 55-62, (1978)

[9]

Burnstock, Costa, General organization and functions of adrenergic nerves, Adrenergic Neurons: Their Organization, Function and Development in the Peripheral Nervous System, pp. 4-18, (1975)

[10]

Christopherson, Gonhyou, Thomson, Effects of temperature and feed intake on plasma concentration of thyroid hormones in beef cattle, Canadian Journal of Animal Science, 59, pp. 655-661, (1979)

← 1 2 3 →