低钙和非植酸磷日粮的评估：对42日龄肉鸡生长性能、胴体产量、胫骨特性和空肠组织形态学的影响

Evaluation of calcium and non-phytate phosphorus deficient diets: effects on growth performance, carcase yield, tibia characteristics and jejunum histomorphology at 42 days of age in broilers.

作者信息

Cufadar Yusuf, Olgun Osman, Gökmen Seyit A, Gül Esra T, Sevim Behlül

机构信息

Department of Animal Science, Agriculture Faculty, Selcuk University, Konya, Türkiye.

Department of Plant and Animal Production, Ladik Vocational School, Ondokuz Mayıs University, Samsun, Türkiye.

出版信息

Br Poult Sci. 2025 Jul 30:1-8. doi: 10.1080/00071668.2025.2530559.

DOI:10.1080/00071668.2025.2530559

PMID:40735944

Abstract

The objective of this study was to ascertain the impact of dietary calcium (Ca) and non-phytate phosphorus (nPP) levels that were progressively reduced in feed on performance, carcase, tibia traits and jejunum crypt depth and villus height in broilers.2. For the purposes of this study, 480, one-day-old chicks were randomly distributed into four treatment groups, with eight replicates per group and 15 birds per replicate. The starter period consisted of two different diets; the control diet contained 0.96% Ca and 0.48% non-phytase phosphorus (nPP) and the L-nPP diet contained 0.90% Ca and 0.45% nPP. The grower and finisher periods consisted of four different diets, namely control, L-nPP1, L-nPP2 and L-nPP3. The Ca contents of the control, L-nPP1, L-nPP2 and L-nPP3 diets during the grower period were 0.87%, 0.83%, 0.79%, 0.75% and the nPP contents were 0.44%, 0.42%, 0.40%, 0.38%, respectively. In the finisher period, the Ca contents of the control, L-nPP1, L-nPP2 and L-nPP3 diets were 0.78%, 0.71%, 0.60%, 0.50% and the nPP contents were 0.39%, 0.35%, 0.30%, 0.30%, respectively.3. Dietary treatments had no effect on body weight or body weight gain; however, a decrease was observed in the L-nPP2 and L-nPP3 diet groups compared to the control group over the 11-24 d period.4. No significant differences were observed in terms of tibial diameter, wall thickness or cross-sectional area. However, tibial ash and shear force were significantly lower in all groups with reduced Ca and nPP levels compared to the control group. The group fed the L-nPP3 diet exhibited a significantly higher crypt depth in comparison to the control and L-nPP1 groups, which was accompanied by a lower ratio of villus height to crypt depth.5. Wheat and maize-based broiler diets can be fed with 23% reduced Ca and nPP levels of recommended values without adversely affecting growth performance but may compromise skeletal health and intestinal histomorphology of broilers.

摘要

本研究的目的是确定饲料中逐渐降低的日粮钙（Ca）和非植酸磷（nPP）水平对肉鸡生产性能、胴体、胫骨性状以及空肠隐窝深度和绒毛高度的影响。
本研究中，480只1日龄雏鸡被随机分为四个处理组，每组8个重复，每个重复15只鸡。育雏期由两种不同日粮组成；对照日粮含0.96%钙和0.48%非植酸酶磷（nPP），低nPP日粮含0.90%钙和0.45% nPP。生长育肥期由四种不同日粮组成，即对照、低nPP1、低nPP2和低nPP3。生长育肥期对照、低nPP1、低nPP2和低nPP3日粮的钙含量分别为0.87%、0.83%、0.79%、0.75%，nPP含量分别为0.44%、0.42%、0.40%、0.38%。育肥期对照、低nPP1、低nPP2和低nPP3日粮的钙含量分别为0.78%、0.71%、0.60%、0.50%，nPP含量分别为0.39%、0.35%、0.30%、0.30%。
日粮处理对体重或体重增加没有影响；然而，在11至24日龄期间，与对照组相比，低nPP2和低nPP3日粮组的体重有所下降。
在胫骨直径、壁厚或横截面积方面未观察到显著差异。然而，与对照组相比，所有钙和nPP水平降低的组胫骨灰分和剪切力显著降低。与对照和低nPP1组相比，饲喂低nPP3日粮的组隐窝深度显著更高，同时绒毛高度与隐窝深度的比值更低。
以小麦和玉米为基础的肉鸡日粮可以在钙和nPP水平比推荐值降低23%的情况下饲喂，而不会对生长性能产生不利影响，但可能会损害肉鸡的骨骼健康和肠道组织形态。