日粮锌和铜水平对生长猪回肠和总表观营养消化率的影响

IF 1.2 4区农林科学 Q3 AGRICULTURE, DAIRY & ANIMAL SCIENCE

Canadian Journal of Animal Science Pub Date : 2023-12-18 DOI:10.1139/cjas-2023-0082

M. A. Ketata, M. Letourneau-Montminy, Frédéric Guay

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引用次数: 0

摘要

本研究旨在评估日粮锌和铜水平对猪的表观回肠消化率（AID）、总消化率（ATTD）以及钙、锰、铁、磷和纤维的影响。实验由六头装有 T 型套管的猪进行。猪从四种日粮中选择一种，日粮中分别添加两种水平的锌（100[低]和 500[高]毫克/千克）和铜（40[低]和 80[高]毫克/千克）。高锌提高了锌和锰的AID，但降低了钙的AID（P < 0.05）。高铜倾向于提高铜的AID，但只有在使用高锌时才会提高（锌×铜，P = 0.051）。在高锌条件下，锌、铜、锰和磷的 ATTD 更大（P < 0.05）。高铜也增加了铜的 ATTD，但降低了钙（P < 0.05）的 ATTD（锌×铜，P = 0.065）。NDF 的 ATTD 有改善趋势（锌×铜，P = 0.069），ADF 的 ATTD 在高锌和高铜的组合下有所增加（交互作用，锌×铜，P < 0.05）。这项研究表明，铜和锌的水平不仅改变了矿物质的消化率，还改变了纤维的降解性。

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Impact of dietary zinc and copper levels on ileal and total apparent nutrient digestibility in growing pigs

This study aimed to evaluate the effect of dietary zinc and copper levels on their apparent ileal digestibility (AID) and total tract digestibility (ATTD), and that of calcium, manganese, iron, phosphorus, and fibre in pigs. The experiment was carried out with six individuals fitted with a T-cannula. Pigs received one of four diets with two levels of zinc (100 [low] and 500 [high] mg/kg) and copper (40 [low] and 80 [high] mg/kg). HighZinc increased AID of zinc and manganese but decreased that of calcium (P < 0.05). HighCopper tended to improve AID of copper but only when highZinc was used (Zinc×Copper, P = 0.051). ATTD of zinc, copper, manganese, and phosphorus was greater in highZinc (P < 0.05). HighCopper also increased ATTD of copper, but reduced that of calcium (P < 0.05) as it likely did for ATTD of phosphorus in lowZinc (Zinc×Copper, P = 0.065). There was an improving trend for ATTD of NDF (Zinc×Copper, P = 0.069), and ATTD of ADF was increased with a combination of highZinc and highCopper (Interaction, Zinc×Copper P < 0.05). This research showed that levels of copper and zinc modified the digestibility of minerals but also the degradability of fibre.

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来源期刊

Canadian Journal of Animal Science 农林科学-奶制品与动物科学

CiteScore

2.30

自引率

0.00%

发文量

审稿时长

6 months

期刊介绍： Published since 1957, this quarterly journal contains new research on all aspects of animal agriculture and animal products, including breeding and genetics; cellular and molecular biology; growth and development; meat science; modelling animal systems; physiology and endocrinology; ruminant nutrition; non-ruminant nutrition; and welfare, behaviour, and management. It also publishes reviews, letters to the editor, abstracts of technical papers presented at the annual meeting of the Canadian Society of Animal Science, and occasionally conference proceedings.