Studies of microbial charactersitics of manure produced by pigs fed different energy diets at different pig growth stage

Regulation of labile fraction of discharged manure represents a promising breakthrough for environmental pollution mitigation. However, investigation of the properties of various pollutant fractions within manure and potential influence of dietary nutrient fractions on the presence of labile manure remains unclear. Feeding trials involving pigs at three distinct growth stages (weaning stage, feeding stage and finishing stage), fed by diets with 9 different energy levels were conducted and the characteristics of labile manure generated under various treatments based on nutrient profiles were analyzed. The study examined the response of manure microorganisms to the aforementioned relationships between pig diets and the occurrence of manure pollutants. The findings of this research are expected to provide valuable insights for modifying diet formulations to better control manure source-related issues.

对排放粪便中不稳定组分的调控，是缓解环境污染的极具前景的突破方向。然而，目前学界对于粪便内各类污染物组分的特性，以及日粮营养组分对粪便不稳定组分存在状态的潜在影响，仍尚未明确。为此，本研究针对断奶、生长、育肥三个不同生长阶段的生猪，采用9种不同能量水平的日粮开展饲养试验，并基于营养配置方案分析了不同处理条件下产生的不稳定粪便的特性；同时探究了粪便微生物对生猪日粮与粪便污染物产生之间上述关联的响应规律。本研究成果有望为优化日粮配方、更好地管控粪便源头相关环境问题提供宝贵的参考依据。