陕北白绒山羊断奶羔羊钙磷需要量的研究

doi:10.11843/j.issn.0366-6964.2018.01.014

摘要/Abstract

摘要：

旨在研究日粮中不同钙磷水平对陕北白绒山羊断奶羔羊生产性能、养分消化代谢的影响，为制订陕北白绒山羊钙磷需要量标准提供参考依据。试验选取36只（（16.48±2.37）kg）日龄、体况相近的陕北白绒山羊断奶羔羊，采用2×2试验设计，随机分为4组，每组设3个重复，每个重复3只羊，分别饲喂不同钙磷水平的日粮，Ⅰ组（0.60%钙、0.45%磷）、Ⅱ组（0.60%钙、0.65%磷）、Ⅲ组（0.80%钙、0.45%磷）和Ⅳ组（0.80%钙、0.65%磷）。试验共65 d。在试验第30天，从每个重复中随机挑选1只羊，共12只，分别放入单独的代谢笼中进行消化代谢试验。结果表明：1）日粮不同钙磷水平对陕北白绒山羊断奶羔羊的干物质采食量没有显著的影响（P>0.05），高钙、高磷水平日粮能够显著的提高日增重（P<0.05）。2）日粮不同钙水平显著影响陕北白绒山羊断奶羔羊的总能消化率和代谢率（P<0.05）。3）日粮不同钙磷水平分别显著影响陕北白绒山羊断奶羔羊的进食钙、磷量，排泄钙、磷量，沉积钙、磷量（P<0.05）。排泄钙、磷与进食钙、磷之间的线性关系分别为Y=0.662X+0.929（R²=0.993），Y=0.776X+0.506（R²=0.996），根据进食钙、磷与排泄钙、磷之间的相关关系可以外推出陕北白绒山羊断奶羔羊的内源损失钙、磷分别为0.929、0.506 g·d^-1。沉积钙、磷与日增重之间的线性关系分别为Y=47.737X-21.622（R²=0.649），Y=53.770X+18.973（R²=0.448）。结果显示，陕北白绒山羊断奶羔羊沉积钙、磷与日增重之间存在着线性关系。在本试验条件下，钙的最适添加水平为0.80%，磷的最适添加水平为0.45%。

Abstract:

The study was conducted to evaluate the effects of dietary with different calcium and phosphorus levels on growth performance, nutrient digestibility and metabolism of weaned lambs in Shaanbei White Cashmere goat, which would provide scientific basis for formulating standard of calcium and phosphorus requirement of weaned lamb of Shaanbei White Cashmere goat. Thirty-six weaned lambs of Shaanbei White Cashmere goat with((16.48±2.37)kg) were randomly selected and assigned to 4 groups, and each group had 3 repeats with 3 goats. The goats were fed with 4 different diets:Ⅰgroup(0.60% Ca, 0.45% P),Ⅱgroup(0.60% Ca, 0.65% P),Ⅲ group(0.80% Ca, 0.45% P) and Ⅳ group(0.80% Ca, 0.65% P) in a 2×2 factorial arrangement. The experiment lasted for 65 d. On the 30th day of the trial, one goat from each repeat was selected and fed individually in cage to carry out the digestion and metabolism experiments. The results showed that:1) Calcium and phosphorus supplementation in the basal diet had no significantly influence on DMI (P>0.05), but increased ADG remarkably (P<0.05) with the increasing of dietary Ca and P levels. 2) Dietary Ca levels had significantly influence on apparent digestibility and metabolic rate of gross energy (P<0.05). 3) Calcium and phosphorus supplementation in the basal diet had significantly influence on intake Ca or P, excretion Ca or P and deposited Ca or P (P<0.05), respectively. The relationships between excretion Ca or P and intake Ca or P were showed in the following regression equations, for Ca:Y=0.662X+0.929 (R²=0.993) and for P:Y=0.776X+0.506 (R²=0.996), the endogenous loss of Ca and P of weaned lamb of Shaanbei White Cahmere goats were 0.929 and 0.506 g·d^-1, respectively. The relationships between deposited Ca or P and ADG were showed in the following regression equations, for Ca:Y=47.737X-21.622 (R²=0.649) and for P:Y=53.770X+18.973 (R²=0.448). These results indicated that the relationships between deposited Ca or P and ADG of weaned lambs in Shaanbei White Cashmere goat were linear. Under the conditions of the study, the optimal dietary supplementation levels of calcium and phosphorus are 0.80% and 0.45% for weaned lambs of Shaanbei White Cashmere goat, respectively.

中图分类号:

S827.5

王浩, 林昌龙, 周广琛, 陈玉林, 杨雨鑫. 陕北白绒山羊断奶羔羊钙磷需要量的研究[J]. 畜牧兽医学报, 2018, 49(1): 121-130.

WANG Hao, LIN Chang-long, ZHOU Guang-chen, CHEN Yu-lin, YANG Yu-xin. Study on Calcium and Phosphorus Requirement of Weaned Lamb in Shaanbei White Cashmere Goat[J]. ACTA VETERINARIA ET ZOOTECHNICA SINICA, 2018, 49(1): 121-130.

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