Cullen J T, Lawlor P G, Viard F, Lourenco A, Gómez-Mascaraque L G, O'Doherty J V, Cormican P, Gardiner G E
Eco-Innovation Research Centre, Department of Science, South East Technological University, Cork Road Campus, Waterford, X91 K0EK, Ireland.
Teagasc Pig Development Department, Animal and Grassland Research and Innovation Centre, Moorepark, Fermoy, Co. Cork, P61 C996, Ireland.
Sci Rep. 2024 Jul 17;14(1):16516. doi: 10.1038/s41598-024-65097-y.
Poor feeding system hygiene may contribute to uncontrolled spontaneous fermentation in liquid pig feed and its associated undesirable effects. This study aimed to determine the effects of an intensive sanitisation programme in a grow-finisher liquid feeding system by monitoring microbiological and physico-chemical parameters of liquid feed and microbial colonisation of the feeding system surfaces. The sanitisation programme involved a combination of physical and chemical cleaning between batches of grow-finisher pigs, combined with nightly rinsing of the system with an organic acid blend. Improved hygiene of the internal surfaces of the mixing tank and feed pipeline, particularly until week 5 post-cleaning, was evidenced by reduced counts of lactic acid bacteria, total aerobes, Enterobacteriaceae, yeasts and moulds and decreased adenosine triphosphate concentrations. Enterobacteriaceae and moulds remained undetectable on pipeline surfaces for 10 weeks. Scanning electron microscopy of the feed pipelines confirmed these findings. Conversely, the impact on liquid feed microbiology was minimal and short-lived. However, acetic acid, ethanol and biogenic amine concentrations decreased in the feed post-cleaning and no gross energy losses were observed. Therefore, by controlling surface microbial communities on liquid feeding systems via implementation of the sanitisation programme developed in the current study, on-farm liquid feed quality should be improved.
较差的饲喂系统卫生状况可能会导致液体猪饲料中出现不受控制的自发发酵及其相关不良影响。本研究旨在通过监测液体饲料的微生物和理化参数以及饲喂系统表面的微生物定殖情况，来确定在生长育肥猪液体饲喂系统中实施强化卫生计划的效果。该卫生计划包括在每批生长育肥猪之间进行物理和化学清洁，并结合每晚用有机酸混合物冲洗系统。混合罐和饲料管道内表面卫生状况的改善，尤其是在清洗后第5周之前，表现为乳酸菌、需氧菌总数、肠杆菌科、酵母菌和霉菌数量减少，以及三磷酸腺苷浓度降低。在10周内，管道表面未检测到肠杆菌科和霉菌。饲料管道的扫描电子显微镜检查证实了这些结果。相反，对液体饲料微生物学的影响很小且持续时间很短。然而，清洗后饲料中的乙酸、乙醇和生物胺浓度降低，且未观察到明显的能量损失。因此，通过实施本研究制定的卫生计划来控制液体饲喂系统表面的微生物群落，有望提高农场液体饲料的质量。
