畜牧兽医学报2018，Vol.49Issue(5)：1061-1073,13.DOI:10.11843/j.issn.0366-6964.2018.05.022
磷源与磷水平对蛋鸡生产性能及钙、磷、氮代谢的影响
Effects of Phosphorus Forms and Levels on the Production Performance and Metabolism of Calcium, Phosphorus and Nitrogen in Laying Hens
摘要
Abstract
The present study was conducted to study the effects of phosphorus (P) forms (CaHPO4 (DCP),Ca(H2PO4)2 · H2O+CaHPO4 · 2H2O (MDCP),Ca(H2PO4)2(MCP) and plant derived dicalcium phosphate (PDCP)) and P supplemented levels (0.1％ and 0.2％) on the production performance,contents of serum calcium(Ca) and P and the metabolism of Ca,P and nitrogen (N) in laying hens.The factorial arrangement of treatments (4 × 2) was used involving four P sources(DCP,MDCP,MCP,PDCP) and two P levels (low P (0.1％) addition group and high P (0.2％) addition group),with a total of 8 treatment groups.A total of 480 53-week-old Hyline Brown laying hens were randomly allocated to 8 dietary treatments (6 replications of 10 hens per replication) and were fed corn-soybean meal basic diet(non-phytic acid phosphorus 0.14％),the nutrient contents were same except P.The experiment lasted for 20 weeks.Daily records of egg production,egg weight and weekly records of feed consumption were maintained throughout the experimental period and average egg production rate,average egg yield and feed/egg ratio were calculated.The blood samples were collected from the winged veins at the tenth and 20th weekends to determine the contents of Ca and P in the serum.In addition,the feces of each group were collected every 5 weeks to determine the contents of Ca,P and N in the feces.The results showed as follows:1) P source,P level and their interactions had no significant influence on average egg production rate,average egg yield and feed/egg ratio of laying hens,however,all of the above indexes in groups of PDCP,MDCP and MCP were better than those in DCP (P＞0.05),and the above indexes in groups of the P level of 0.2％ were also better than those in the level of 0.1％ (P＞0.05).2) P source,P level and their interactions had no significant effects on serum Ca (P＞0.05),meanwhile,P source and the interaction between P source and P level had no significant effects on serum P (P＞0.05).3) Compared with the DCP group,the excretion of Ca (P＜0.05) and P (P＜0.01) in the PDCP group decreased significantly,P excretion in the MCP group decreased significantly (P＜0.05).P source had no significant effect on N excretion (P＞0.05).Compared with the P level of 0.1％ supplemented group,the Ca excretion in the P level of 0.2％ group decreased significantly (P＜0.01),and P excretion increased significantly (P＜0.01).The interaction between P source and P level had significant effects on P excretion (P＜0.01),while had no significant effect on excretion of N (P＞0.05) in laying hens.The results suggested that adding 0.1％-0.2％ P level to the basal diet (the level of NPP was 0.14％) could satisfy the production performance of the laying hens,and P forms of PDCP and MDCP were better for laying hens.关键词
磷源/磷水平/血清钙/血清磷/代谢Key words
phosphorus forms/phosphorus level/serum calcium/serum phosphorus/metabolism分类
农业科技引用本文复制引用
何万领,李晓丽,李旺,丁轲,李元晓,任振东..磷源与磷水平对蛋鸡生产性能及钙、磷、氮代谢的影响[J].畜牧兽医学报,2018,49(5):1061-1073,13.基金项目
河南科技大学青年科学基金项目(2015QN039) （2015QN039）
国家自然科学基金项目(U1504324) （U1504324）
河南科技大学创新培育基金项目(4025-13480066) （4025-13480066）
河南艾格多科技有限公司重点攻关项目(2016ZD0013) （2016ZD0013）
