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    • Effects of Different Conditions Tested "in Vitro" on the Phosphorus Runoff Potential of Livestock Manure.

    Fuqing Xu, Hongzhen Ma,Jiawei Liang,Solomon Inalegwu Okopi,Shoujun Yang,Leipeng Cao,Weimin Sun

    Waste Management（2022）SCI 1区SCI 2区

    National-Regional Joint Engineering Research Center for Soil Pollution Control and Remediation in South China | Xi An Jiao Tong Univ | China Agr Univ | State Key Laboratory of Food Science and Technology

    Cited 2|Views35
    Abstract
    This study aimed to investigate the changes of swine and dairy manure characteristics during a long-term storage (150-180 days) under 4 degrees C, 20 degrees C, and 37 degrees C, sealed and unsealed conditions. Water extractable phosphorus (WEP) of both manures rapidly increased during the first 15-30 days and then decreased. At the end of the storage, the WEP reduction was 90%+/- 3% and 71%+/- 5% of the initial concentration for swine manure and dairy manure, respectively. Generally, unsealed storage and higher temperatures led to more WEP reduction. This study suggested that manure stored for less than 30 days had the highest P runoff potential, while a long-term manure storage reduced P runoff potential compared to freshly excreted manure.
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    Key words
    Swine manure,Dairy manure,Manure storage,Manure management,Water extractable phosphorus,Phosphorus runoff
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    【要点】：该研究调查了不同条件下（4°C, 20°C, 和 37°C，密封与不密封）长期储存（150-180天）对猪粪和牛粪磷流失潜力的影响，发现短期储存（小于30天）的粪便具有最高的磷流失潜力，而长期储存会降低磷流失潜力。
    

    【方法】：本研究通过在不同温度和密封条件下的长期储存，检测猪粪和牛粪特性的变化。
    

    【实验】：实验结果显示，两种粪便的水溶性磷（WEP）在前15-30天内迅速增加后降低，储存结束时，猪粪和牛粪的WEP分别减少了初始浓度的90%±3%和71%±5%。通常，不密封储存和更高温度导致更多的WEP减少。