Adler Carolin, Schmithausen Alexander J, Trimborn Manfred, Heitmann Sophia, Spindler Birgit, Tiemann Inga, Kemper Nicole, Büscher Wolfgang
Institute of Agricultural Engineering, University of Bonn, 53115 Bonn, Germany.
Corteva Agriscience, Riedenburger Straße 7, 81677 München, Germany.
Animals (Basel). 2021 Mar 5;11(3):707. doi: 10.3390/ani11030707.
A partially (50%) perforated flooring system showed positive effects on health- and behavior-based welfare indicators without affecting production performance. Ammonia (NH) is the most common air pollutant in poultry production, with effects on animal welfare and the environment. The objectives of animal welfare and environmental protection are often incompatible. Therefore, this study addresses the question of how a partially perforated flooring system affects NH emissions. According to German regulations, three fattening periods were carried out with 500 Ross 308 broilers per barn (final stocking density: 39 kg m). The experimental barn was equipped with an elevated perforated area in the supply section, accessible by perforated ramps. The remaining area in the experimental barn and the control barn were equipped with wood shavings (600 g m). Besides the different floor types, management was identical. Air temperature (Temp), relative air humidity (RH), NH concentration, and ventilation rate (VR) were measured continuously. Furthermore, dry matter (DM) content, pH, and litter quality were assessed. Towards the end of the fattening periods, the NH emission rate (ER) of the partially perforated flooring system was higher compared with that of the littered control barn (all < 0.001). This effect is mainly caused by the higher NH concentrations, which are promoted by the lack of compaction underneath the elevated perforated area and the increase in pH value under aerobic conditions. Nevertheless, the partially perforated flooring system offers different approaches for NH reduction that were previously not feasible, potentially contributing equally to animal welfare and environmental protection.
部分（50%）穿孔的地板系统对基于健康和行为的福利指标有积极影响，且不影响生产性能。氨（NH）是家禽生产中最常见的空气污染物，对动物福利和环境都有影响。动物福利和环境保护的目标往往相互矛盾。因此，本研究探讨了部分穿孔地板系统如何影响氨排放的问题。根据德国法规，每个鸡舍饲养500只罗斯308肉鸡，进行三个育肥期（最终饲养密度：39 kg/m）。实验鸡舍在供应区设有一个高架穿孔区域，可通过穿孔坡道进入。实验鸡舍和对照鸡舍的其余区域都铺设了刨花（600 g/m）。除了地板类型不同外，管理方式相同。连续测量空气温度（Temp）、相对空气湿度（RH）、氨浓度和通风率（VR）。此外，还评估了干物质（DM）含量、pH值和垫料质量。在育肥期结束时，部分穿孔地板系统的氨排放率（ER）高于铺有垫料的对照鸡舍（所有P<0.001）。这种影响主要是由于高架穿孔区域下方缺乏压实以及有氧条件下pH值升高导致氨浓度升高。然而，部分穿孔地板系统提供了以前不可行的不同氨减排方法，可能对动物福利和环境保护有同样的贡献。
