本试验旨在研究牧区冬春季低质粗饲料供给下，补饲不同钙、磷水平的精料补充料对断奶羔羊生长性能、血清生化指标及骨成分的影响。选取（30±2）日龄、体重为（12.50±1.21） kg的断奶乌珠穆沁羔羊96只，随机分成3组，每组32只，公母各占1/2。3组羔羊分别补饲相同钙磷比及不同钙、磷水平的3种精料补充料，分别为A组（钙0.40%、磷0.38%）、B组（钙0.50%、磷0.48%）和C组（钙0.68%、磷0.65%），试验期55 d，其中预试期5 d，正试期50 d。结果表明：随着精料补充料钙、磷水平的增加，羔羊总采食量、平均日增重没有显著变化（P>0.05），平均日增重接近200 g/d；试验第50天，各组羔羊血清钙、甲状旁腺素含量及碱性磷酸酶活性也无显著性差异（P>0.05），C组羔羊血清磷含量显著高于A组和B组（P<0.05）；C组羔羊胫骨钙含量显著高于A组（P<0.05），与B组差异不显著（P>0.05），各组羔羊胫骨磷含量无显著差异（P>0.05）。由此可见，在牧区冬春季枯草期，不同钙、磷水平的精料补充料未对乌珠穆沁羔羊的生长性能、部分血清生化指标及胫骨磷含量产生显著影响，精料补充料中钙0.40%、磷0.38%的水平即可满足羔羊生长需求，加入过量的钙、磷，既浪费资源又污染环境。
关键词：
羔羊; 钙; 磷; 生长性能; 精料补充料
司丙文
,
王杰
,
张帆
,
张乃锋
,
马涛
,
刁其玉
,
朝鲁孟
,
徐文丽
,
索琼玉
,
屠焰
. 精料补充料钙、磷水平对牧区冬春季羔羊生长性能、血清生化指标及骨成分的影响[J]. 动物营养学报, 2016
, 28(9)
: 2742
-2748
.
DOI: 10.3969/j.issn.1006-267x.2016.09.011
This study aimed to investigate the effects of different levels of calcium and phosphorus of supplementary concentrate on growth performance, serum biochemical indices and bone composition of lambs fed low quality roughages in pastoral areas of Inner Mongolia during winter and spring season. Ninety-six healthy Ujumuqin weaner lambs (half male and half female) aged (30±2) days with body weight of (12.50±1.21) kg were assigned to one of three groups with 32 lambs per group using single factor experimental design. Lambs were offered supplementary concentrate with different levels of calcium and phosphorus (group A: calcium 0.40% and phosphorus 0.38%; group B: calcium 0.50% and phosphorus 0.48%; group C: calcium 0.68% and phosphorus 0.65%). The experiment lasted for 55 d including 5 d of pre-experiment and 50 d of experiment. The results showed as follows: average daily gain (ADG) of three groups was very similar with an approximate value of 200 g/d. ADG and total feed intake were not significantly affected by supplementary concentrate with different levels of calcium and phosphorus (P>0.05). On day 50, serum phosphorus content of group C was significantly higher than that of groups A and B (P<0.05). The contents of serum calcium and parathyroid hormone, and the activity of alkaline phosphatase did not differ significantly among groups (P>0.05). Calcium content in tibia of group C was significantly higher than that of group A (P<0.05), and was not significantly different from that of group B(P>0.05), whereas no significant difference was observed in phosphorus content in tibia among groups (P>0.05). The results indicate that calcium and phosphorus levels of supplementary concentrate have no significant effects on growth performance, parts of serum biochemical indices and phosphorus content in tibia of Ujumuqin lambs in pastoral areas of Inner Mongolia during winter and spring season; calcium and phosphorus at 0.40 % and 0.38 % of supplementary concentrate, respectively, can met the requirement for growth, while high levels of calcium and phosphate input may contribute to resource waste and environment pollution.
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