Abstract：
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 NH3 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.
摘要：
研究了桃壳生物炭（PSB）改良剂对羊粪（SM）堆肥的影响。应用了五种不同比例的PSB(0%，2.5%,5%,7.5%,和10%PSB)，并命名为T1至T5，并进行了50天的堆肥实验。发现PSB（尤其是7.5％和10％）可以改善堆肥环境，调节微生物和相关酶的活性，促进堆肥的分解。7.5％和10％PSB将堆推进到嗜热阶段，并提高了最高温度，同时与对照相比，发芽指数也增加了1.40和1.39倍。重要的是,10％PSB通过抑制NH3和温室气体的过量释放，有效地保留了60％以上的碳和55％的氮。高比例PSB修正案增加了脱氢酶和纤维素酶的活性，但抑制蛋白酶和脲酶。相关结果表明，PSB改变了关键细菌属，与环境因素的相关性更强，分别为7.5％和10％。因此,7.5％和10％的桃壳生物炭可以作为适当的比例来改善堆肥条件。
