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A microbial agent effectively reduces ammonia volatilization and ensures good maggot yield from pig manure composted via housefly larvae cultivation

文献类型： 外文期刊

作者： Zhu, Fengxiang 1 ; Hong, Chunlai 1 ; Wang, Weiping 1 ; Lyu, Haohao 1 ; Zhu, Weijing 1 ; Xv, Hanjing 1 ; Yao, Yanlai 1 ;

作者机构： 1.Zhejiang Acad Agr Sci, Inst Environm Resource Soil & Fertilizer, Hangzhou 310021, Zhejiang, Peoples R China

关键词： Microbial agent; Ammonia volatilization; Housefly larvae cultivation; Pig manure; Yield; Microbial population structure

期刊名称：JOURNAL OF CLEANER PRODUCTION （ 影响因子：9.297； 五年影响因子：9.444 ）

ISSN： 0959-6526

年卷期： 2020 年 270 卷

页码：

收录情况： SCI

摘要： Ammonia volatilization is a serious concern in the two-stage composting of pig manure. To reduce ammonia volatilization, an optimal microbial agent concentration for maintaining nitrogen in compost was determined. The microbial agent had a negative effect on housefly larval growth, but all treatments achieved good yields of late-instar maggots above 12% fresh material weight. The volatilization of ammonia was efficiently reduced by directly mixing 1% microbial agent into the initial material, and the ammonia volatilization within the monitoring time was decreased by 60.7% and 68.2% in T3 (undiluted microbial fermentation liquid) and T2 (10-fold diluted microbial fermentation liquid) on day 4, respectively, compared with that of T0 (the same volume of water without microbial agent). The total nitrogen loss from fermentation in T3 was reduced by 44.76% by day 6 compared with that in T0 but decreased only by 17.12% upon the completion of composting. Maggot breeding had a substantial effect on the microbial population structure in the materials. According to the changes in the total organic carbon content, soluble carbon content, and seed germination index, the composting process should be completed within 3-4 w to retain optimal organic carbon and nitrogen contents. Our results highlight that the microbial agent beneficially not only reduces ammonia volatilization and the total nitrogen loss but also ensures good maggot yield from pig manure composted via housefly larvae cultivation. (C) 2020 Elsevier Ltd. All rights reserved.

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