废蘑菇堆肥的成熟度评价

Yaning Luan, Xiangyang Sun, Suyan Li, Yong Qiao, L. Suo
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引用次数: 0

摘要

堆肥的成熟度是农业和园艺生产中一个重要的实用因素。本研究对蘑菇废堆肥(SMC)进行了成熟度评价。采用标准化学分析(pH、EC、CEC、总C和总N含量、C/N比、NH4+-N、NO3——N)评价堆肥成熟度。随后,利用芥蓝种子萌发生物测定法评估了SMC的潜在植物毒性。在28 d快速堆肥期间,从单窗定期收集SMC样品。随着堆肥时间的延长,pH和EC值都有增加的趋势,最终两者保持不变。持续增加的CEC似乎不是一个更敏感的指标。尽管全C含量(TC)和全N含量(TN)在评价堆肥成熟度方面价值有限,但C/N显著降低。NH4+-N在堆肥前14 d内呈下降趋势,NO3——N直到14 d后才有所增加。根据种子萌发指数(GI),随着堆肥时间的延长,SMC的毒性有降低的趋势。试验结果表明,快速堆肥21天后,SMC成熟。因此,pH、EC和GI有潜力作为SMC成熟度评价的有用指标。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Maturity Evaluation of Spent Mushroom Compost
Maturity of compost is an important practical factor in agricultural and horticulture production. This study was conducted to perform maturity assessment for spent mushroom compost (SMC). Compost maturity were evaluated using standard chemical analyses (pH, EC, CEC, total C and N content, C/N ratio, NH4+-N, NO3--N). Subsequently, potential phytotoxicity from SMC was assessed by germination bioassay using Lepidium sativum L. (cress). SMC samples were collected periodically during a 28-d rapid composting period from a single windrow. Following composting time, the pH and EC values had a tendency to increase, and in the end, the two values maintained constant. The increasing continuously CEC did not appear to be a more sensitive indicator. Although total C content (TC) and total N content (TN) were of limited value in assessing compost maturity, C/N ratio decreased significantly. NH4+-N declined within the first 14 days of composting, while NO3--N did not increase until 14+ days. According to seed germination index (GI), when composting time was prolonged, the toxicity of SMC had a tendency to decrease. Results from the experiments indicate that 21 days after rapid composting, SMC is considered to be mature. It is therefore concluded that pH, EC and GI have potential as useful indicators for SMC maturity evaluation.
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