动物营养学报 >

2021 , Vol. 33 >Issue 11: 6213 - 6222

DOI: https://doi.org/10.3969/j.issn.1006-267x.2021.11.022

反刍与草食动物营养与饲料 RUMINANT AND HERBIVORE NUTRITION AND FEED

空怀期云南半细毛羊磷需要量

  • 欧阳依娜 ,
  • 王思宇 ,
  • 梁家充 ,
  • 薛白 ,
  • 李卫娟 ,
  • 李银江 ,
  • 洪琼花
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  • 1. 云南省畜牧兽医科学院, 昆明 650224;
    2. 四川农业大学动物营养研究所, 温江 611130
欧阳依娜(1979-),女,云南昆明人,副研究员,博士,从事反刍动物营养研究。E-mail:yinaouyang@126.com

收稿日期: 2021-04-17

  网络出版日期: 2021-11-10

基金资助

国家现代农业绒毛用羊产业技术体系专项资金资助（CARS-39）；省科技人才和平台计划（2018IC108）；云南省科技创新人才计划（2018HC017）

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Phosphorus Requirement for Yunnan Semi-Fine Wool Sheep during Non-Pregnancy

  • OUYANG Yina ,
  • WANG Siyu ,
  • LIANG Jiachong ,
  • XUE Bai ,
  • LI Weijuan ,
  • LI Yinjiang ,
  • HONG Qionghua
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  • 1. Yunnan Animal Science and Veterinary Institute, Kunming 650224, China;
    2. Animal Nutrition Institute, Sichuan Agricultural University, Wenjiang 611130, China

Received date: 2021-04-17

  Online published: 2021-11-10

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摘要

本试验旨在研究饲粮磷水平对空怀期云南半细毛羊生长性能、磷消化代谢及血清生化指标的影响，以确定空怀期云南半细毛羊磷需要量。选择50只体况良好、体重相近且年龄一致的经产2胎空怀期云南半细毛羊，按体重随机分为5组，每组10只，每只羊为1个重复，分别饲喂磷水平为0.19%、0.32%、0.45%、0.56%和0.64%的试验饲粮，饲粮其他营养水平保持一致。试验期共44 d，其中预试期14 d，正试期30 d。在正试期第12天从各组中选取5只母羊进行为期5 d的消化代谢试验。结果表明：1）0.19%和0.32%磷水平组平均净增重和平均日增重显著高于0.45%和0.64%磷水平组（P<0.05），而前者料重比显著低于后者（P<0.05）；干物质采食量以0.19%磷水平组最高，显著高于0.45%、0.56%和0.64%磷水平组（P<0.05），而与0.32%磷水平组差异不显著（P>0.05）。2）随着饲粮磷水平升高，空怀期母羊进食磷、粪磷、尿磷、排泄磷、可消化磷和沉积磷显著或极显著提高（P<0.05或P<0.01）；而磷表观消化率和磷利用率呈先降低后升高的趋势，0.19%、0.56%和0.64%磷水平组间磷利用率差异不显著（P>0.05）。3）随着饲粮磷水平升高，空怀期云南半细毛羊的血清磷含量、碱性磷酸酶（ALP）活性呈上升趋势，血清降钙素（CT）和瘦素（LEP）含量呈先升高后下降趋势；0.32%磷水平组血清羟脯胺酸（HYP）含量显著高于0.45%和0.56%磷水平组（P<0.05）；饲粮磷水平对血清钙、甲状旁腺激素（PTH）和骨钙素（BGP）含量的影响则不显著（P>0.05）。4）进食磷（x）与沉积磷（y3）的线性回归方程为y3=0.309 1x-0.025 4（R2=0.893 4）。综上所述，饲粮磷水平在0.19%~0.32%时有利于空怀期云南半细毛羊的生长，减少磷的排泄量和沉积量，空怀期云南半细毛羊磷维持需要量为0.082 2 g/（kg W0.75·d），总磷需要量为0.21~0.33 g/（kg W0.75·d）。

关键词： 云南半细毛羊; 空怀期; 磷; 生长性能; 磷消化代谢; 血清生化指标; 磷需要量

本文引用格式

欧阳依娜 , 王思宇 , 梁家充 , 薛白 , 李卫娟 , 李银江 , 洪琼花 . 空怀期云南半细毛羊磷需要量[J]. 动物营养学报, 2021 , 33(11) : 6213 -6222 . DOI: 10.3969/j.issn.1006-267x.2021.11.022

Abstract

This study was conducted to evaluate the effects of dietary phosphorus (P) level on growth performance, P digestion and metabolism, and serum biochemical indices of Yunnan semi-fine wool sheep during non-pregnancy, and to determine the P requirement for Yunnan semi-fine wool sheep during non-pregnancy. A total of fifty healthy non-pregnant Yunnan semi-fine wool sheep with the similar age and body weight were randomly divided into 5 groups, and each group had 10 replicates containing 1 ewe per replicate. The P level of experiment diets for the 5 groups were 0.19%, 0.32%, 0.45%, 0.56% and 0.64%, respectively, and other nutrient levels were consistent. The experiment lasted for 44 d, including 14 d of pretrial period and 30 d of experimental period. On the 12th day of the experimental period, five ewes were randomly selected from each group and fed individually in cage for digestion and metabolism experiment of 5 d. The results showed as follows:1) the average net gain and average daily gain in 0.19% and 0.32% P level groups were significantly higher than those in 0.45% and 0.64% P level groups (P<0.05), however, the feed/gain in 0.19% and 0.32% P level groups was significantly lower than that in 0.45% and 0.64% P level groups (P<0.05). The highest dry matter intake was observed in 0.19% P level group, which was significantly higher than that in 0.45%, 0.56% and 0.64% P level groups (P<0.05), but there was no significant different between 0.19% and 0.32% P level groups (P>0.05). 2) P intake, fecal P, urine P, P excretion, digestible P and P retention were significantly or extremely significantly increased with the dietary P level increasing (P<0.05). P apparent digestibility and P utilization were decreased firstly and then increased with the dietary P level increasing. No significant differences were found in P utilization among 0.19%, 0.56% and 0.64% P level groups (P>0.05). 3) Serum P content and alkaline phosphatase (ALP) activities were increased with the dietary P level increasing. Serum calcitonin (CT) and leptin (LEP) contents were increased firstly and then decreased with the dietary P level increasing. Serum hydroxyproline (HYP) content in 0.32% P level group was significantly higher than that in 0.45% and 0.56% P level groups (P<0.05). Dietary P level had no significant effects on serum calcium (Ca), parathyroid hormone (PTH) and osteocalcin (BGP) contents (P>0.05). 4) The correlation between P intake (x) and P retention (y3) was showed in the linear regression equation, y3=0.309 1x-0.025 4 (R2=0.893 4). According to above findings, when the dietary P level is 0.19% to 0.32%, it is beneficial to maintain the growth and decrease the excretion and deposition of P. Maintenance P requirement of Yunnan semi-fine wool sheep during non-pregnancy is 0.082 2 g/(kg W0.75·d), and the total P requirement is 0.21 to 0.33 g/(kg W0.75·d).

Key words： Yunnan semi-fine wool sheep; non-pregnancy; phosphorus; growth performance; phosphorus digestion and metabolism; serum biochemical indexes; phosphorus requirement

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