EFFECTS OF SULFATE SUPPLEMENTATION ON PERFORMANCE, ACID-BASE-BALANCE, AND NUTRIENT METABOLISM IN ANGORA KIDS

被引：7

作者：

QI, K ^{[1
]}

LU, CD ^{[1
]}

OWENS, FN ^{[1
]}

LUPTON, CJ ^{[1
]}

机构：

[1] LANGSTON UNIV,AGR RES PROGRAM,LANGSTON,OK 73050

来源：

SMALL RUMINANT RESEARCH | 1994年 / 15卷 / 01期

关键词：

GOAT; SULFUR; GROWTH; ANGORA; NUTRIENT METABOLISM;

D O I：

10.1016/0921-4488(94)90055-8

中图分类号：

S8 [畜牧、动物医学、狩猎、蚕、蜂];

学科分类号：

0905 ;

摘要：

Twelve Angora goat kids (BW: mean +/- SE = 18.1 + 0.6 kg; castrated males) were individually fed isonitrogenous and isocaloric diets containing 0.11 (basal), 0.20, 0.28 or 0.38% S of dietary DM (added as CaSO4). During the 8-wk growth phase, sulfate supplementation up to 0.20% S in the diet increased average daily gain (ADG) by 44%, dry matter intake (DMI) by 17%, and feed conversion efficiency (FE, ADG/DMI) by 23% compared with average Angora kids fed the other diets. Clean mohair production was numerically highest for kids fed the 0.28% S diet, but mohair fiber diameter was not affected (P > 0.20) by added S. Mohair staple length tended to increase quadratically (P < 0.20) with sulfate supplementation. Average daily gain (P < 0.05) and DMI (P < 0.0001) were lower for Angora than for Alpine kids (70 vs. 95 g and 762 vs. 1125 g/d, respectively), but FE was higher (P > 0.20) for Angora than Alpine kids. Plasma free cysteine was quadratically increased by S supplementation in Angora kids. Blood pH did not differ between breeds. Blood HCO3-, total CO2 content, pCO2, base excess in extra-cellular fluids, and standard bicarbonate were lower (P < 0.05) in Angora than in Alpine kids, but blood partial pressure of O2 and oxygen saturation were higher (P < 0.05) in Angora than in Alpine kids, perhaps due to increased heat dissipation via respiration by Angora kids. Plasma glucose, urinary outputs of creatinine and uric acid were lower (P < 0.05), and plasma free cysteine concentration higher (P < 0.01) for Angora than for Alpine kids. Ruminal L-lactate concentration (P < 0.001) and purine N content in isolated bacteria (P < 0.01) were lower, but ruminal NH3-N content (P < 0.10) was higher, and ruminal sulfide-S content (P < 0.20) tended to be higher for Angora than for Alpine kids. Angora kids were faunated, whereas Alpine kids were fauna-free. The N/S ratio in isolated rumen bacteria was lower (P < 0.10) for Angora than for Alpine kids. Calculated by regression, ADG was maximum with 0.22% S (N/S = 10.4:1) for Angora kids vs. 0.21% S for Alpine kids.

引用

页码：19 / 29

页数：11

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