The effect of peach shell biochar (PSB) amendment on sheep manure (SM) composting was investigated. Five different ratios of PSB were applied (0%, 2.5%, 5%, 7.5%, and 10% PSB), and named T1 to T5, and run 50 days of composting experiment. It was found that PSB (especially 7.5% and 10%) could improve the compost environment, regulate the activity of microorganisms and related enzymes, and promote the decomposition of compost. 7.5% and 10% PSB advanced the heap into the thermophilic stage and increased the maximum temperature, while also increasing the germination index by 1.40 and 1.39 times compared to control. Importantly, 10% PSB effectively retained more than 60% of carbon and 55% of nitrogen by inhibiting the excess release of NH and greenhouse gases. High proportion PSB amendment increased the activity of dehydrogenase and cellulase, but inhibited protease and urease. The correlation results indicated that PSB changed the key bacterial genus, and there was a stronger association with environmental factors at 7.5% and 10%. Therefore, 7.5% and 10% peach shell biochar can be used as appropriate proportions to improve composting conditions.

中文翻译：

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桃壳生物炭占羊粪堆肥的气体排放和酶动态评价


研究了桃壳生物炭（PSB）改良剂对羊粪（SM）堆肥的影响。应用五种不同比例的PSB（0％、2.5％、5％、7.5％和10％PSB），并命名为T1至T5，并进行50天的堆肥实验。研究发现PSB（特别是7.5%和10%）可以改善堆肥环境，调节微生物及相关酶的活性，促进堆肥分解。 7.5%和10% PSB使堆提前进入高温阶段，提高最高温度，同时发芽指数较对照提高1.40和1.39倍。重要的是，10% PSB 通过抑制 NH 和温室气体的过量释放，有效保留了 60% 以上的碳和 55% 以上的氮。高比例的PSB改良剂提高了脱氢酶和纤维素酶的活性，但抑制了蛋白酶和脲酶的活性。相关结果表明，PSB改变了关键细菌属，且与环境因素的相关性更强，分别为7.5%和10%。因此，可采用7.5%和10%的桃壳生物炭作为适当比例来改善堆肥条件。