Date of the pasture cattle manure pollution research

Results indicated that FCM contained high N and total organic carbon compared to DCM. Leaching experiments revealed the FCM released more N and P to pastoral water than those from DCM. However, soil adsorption and desorption experiments demonstrated that soil in pastoral areas would reserve N and P from CM, reducing the contribution to water pollution. Furthermore, the predominant organisms in FCM such as Proteobacteria and Bacteroidota would inhibit the release of N and P from CM. The quantified pollution load from CM to water quality deterioration revealed that, the contribution of N and P inputs was generally below 1%, indicating that CM is not the major driving factor for water quality decline. Therefore, although CM contributes pollution load, its impact on water quality evolution is limited compared to other anthropogenic factors (local industry and agriculture). The study provides new insight for integrated management strategies to protect the ecological health in pasture.研究结果表明，相较于DCM，FCM的氮（Nitrogen）与总有机碳（Total Organic Carbon）含量更高。淋溶实验结果显示，FCM向牧场水体释放的氮与磷（Phosphorus）量高于DCM样品。然而，土壤吸附-解吸实验证实，牧场土壤会留存CM中的氮与磷，从而降低其对水体污染的贡献。此外，FCM中的优势微生物类群，如变形菌门（Proteobacteria）与拟杆菌门（Bacteroidota），可抑制CM中氮与磷的释放。针对CM引发水体水质恶化的污染负荷量化分析显示，其输入的氮与磷的贡献占比普遍低于1%，表明CM并非水质下降的主要驱动因素。因此，尽管CM会产生污染负荷，但相较于当地工农业等其他人为因素，其对牧场水体水质演化的影响较为有限。本研究为制定牧场生态健康保护的综合管理策略提供了新的视角。