Schreiter Ruben, Damme Klaus, Freick Markus
ZAFT e.V. Centre for Applied Research and Technology, D-01069 Dresden, Germany.
Bavarian State Farms, Research and Education Center for Poultry, D-97318 Kitzingen, Germany.
Animals (Basel). 2021 Mar 11;11(3):773. doi: 10.3390/ani11030773.
In this cross-sectional study, 103 complete feed samples from laying hen herds affected by plumage damage as an indirect measure for severe feather pecking (affected herds; AH, = 37) and control herds without plumage damage (control herd; CH, = 66) of commercial German farms were examined by dry sieve and nutrient analysis. AH showed higher percentages of particles >2.50 mm (mean ± SD, CH: 11.0 ± 8.5%, AH: 24.9 ± 14.3%) and 2.00-2.50 mm (CH: 11.2 ± 5.3%, AH: 15.7 ± 5.7%), but lower proportions of fractions 1.01-1.60 mm (CH: 22.9 ± 4.9%, AH: 17.8 ± 5.7%), 0.51-1.00 mm (CH: 25.5 ± 8.2%, AH: 16.0 ± 6.8%) and ≤0.50 mm (CH: 15.4 ± 5.0%, AH: 11.0 ± 4.8%) ( < 0.001). Diets of AH had a higher geometric mean diameter (GMD) compared to CH (AH: 1470.8 ± 343.9 μm; CH: 1113.3 ± 225.7 μm) ( < 0.001). Contents of crude ash (CH: 130.3 ± 18.8 g/kg, AH: 115.9 ± 24.3 g/kg), lysine (CH: 8.2 ± 1.0 g/kg, AH: 7.7 ± 1.2 g/kg), methionine (CH: 3.4 ± 0.5 g/kg, AH: 3.2 ± 0.6 g/kg) and sodium (CH: 1.7 ± 0.4 g/kg, AH: 1.3 ± 0.4 g/kg) were lower in AH ( ≤ 0.041). In a logistic regression model, animal age ( = 0.041) and GMD ( < 0.001) were significant factors on the occurrence of plumage damage.
在这项横断面研究中，通过干筛法和营养成分分析，对来自德国商业农场的受羽损影响的蛋鸡群（作为严重啄羽的间接指标；受影响鸡群；AH，n = 37）和无羽损的对照鸡群（对照鸡群；CH，n = 66）的103份全价饲料样本进行了检测。AH中粒径>2.50毫米（平均值±标准差，CH：11.0±8.5%，AH：24.9±14.3%）和2.00 - 2.50毫米（CH：11.2±5.3%，AH：15.7±5.7%）的颗粒百分比更高，但1.01 - 1.60毫米（CH：22.9±4.9%，AH：17.8±5.7%）、0.51 - 1.00毫米（CH：25.5±8.2%，AH：16.0±6.8%）和≤0.50毫米（CH：15.4±5.0%，AH：11.0±4.8%）粒径级分的比例更低（P < 0.001）。与CH相比，AH的日粮几何平均直径（GMD）更高（AH：1470.8±343.9微米；CH：1113.3±225.7微米）（P < 0.001）。AH中粗灰分（CH：130.3±18.8克/千克，AH：115.9±24.3克/千克）、赖氨酸（CH：8.2±1.0克/千克，AH：7.7±1.2克/千克）、蛋氨酸（CH：3.4±0.5克/千克，AH：3.2±0.6克/千克）和钠（CH：1.7±0.4克/千克，AH：1.3±0.4克/千克）的含量更低（P≤0.041）。在逻辑回归模型中，鸡龄（P = 0.041）和GMD（P < 0.001）是羽损发生的显著影响因素。
