摘要
选用800只21日龄白羽肉鸡,采用5×4二因子完全随机试验设计,随机分成20组,每组4个重复。在玉米-豆粕型日粮基础上添加5个水平钙(0.6%、0.8%、1.0%、1.2%和1.5%)和4个水平非植酸磷(0.35%、0.45%、0.55%和0.65%),研究饲料中不同钙、磷水平对4～6周龄肉鸡骨骼生长的影响。结果表明:胫骨强度、胫骨灰分及胫骨磷含量和日粮钙、磷水平呈显著正相关(P<0.05),但1.5%钙、0.6%钙和0.35%非植酸磷都显著降低胫骨强度、胫骨灰分及胫骨磷含量(P<0.05)。4-6周龄肉鸡达到最大胫骨强度时的日粮钙、非植酸磷添加水平分别为1.0%和0.45%。。由回归方程得出4-6周龄肉鸡胫骨灰分含量和胫骨强度达最大时的日粮钙、非植酸磷添加水平分别为0.99%、0.55%和1.02%、0.55%。
The experiments were conducted to estimate effects of calcium and phosphorus levels on bone growth of broilers.Eight hundred 1-day-old AA broilers with similar body weight were randomly allotted into 20 experimental treatments with 4 replicates of 10 broilers each.Broilers were fed with the diets containing five levels of calcium（0.6%,0.8%,1.0%,1.2%and 1.5%） and four levels of nonphytate phosphorus（0.35%,0.45%,0.55%and 0.65%） in a 5 × 4 factorial arrangement.The results showed thatthe tibia strength,tibia ash and tibia phosphorus were significantly positively related to dietary calcium and phosphorus concentration（P0.05）,but tibia strength,tibia ash and tibia phosphorus were decreased significantly while dietary calcium 1.5%,0.6% and nonphytate phosphorus 0.35%（P0.05）.The results also suggested that the maximum tibia strength was obtained when calcium,nonphytate phosphorus levels were 1.0% and 0.45% during 4 to 6 weeks.The results indicated that the requirements of calcium and nonphytate phosphorus for optimal tibia ash and tibia strength were 0.99% and 0.55%,1.02% and 0.55%,respectively.
出处
《中国畜牧杂志》
CAS
北大核心
2011年第7期37-41,共5页
Chinese Journal of Animal Science
基金
"十一五"国家科技支撑计划资助(2006BA12B02)
关键词
钙
磷
胫骨强度
胫骨灰分
肉鸡
calcium
phosphorus
tibia strength
tibia ash
broiler
