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Fertilization strategies to reduce yield-scaled N2O emissions based on the use of biochar and biochar-based fertilizers
Nutrient Cycling in Agroecosystems ( IF 3.1 ) Pub Date : 2023-09-09 , DOI: 10.1007/s10705-023-10313-w
Raúl Castejón-del Pino , Miguel A. Sánchez-Monedero , María Sánchez-García , María L. Cayuela

Novel fertilization strategies, such as the use of biochar-based fertilizers (BBFs) and the co-application of biochar with mineral fertilizers, have shown promising results for mitigating nitrous oxide (N2O) emissions and reducing N losses in agroecosystems. Two greenhouse experiments were performed with radish to evaluate: (1) the mitigation of yield-scaled N2O emissions using BBFs, produced at either 400 or 800 °C and enriched with urea, compared to the co-application of raw biochars with urea; and (2) the N2O mitigation potential of low rates of raw biochars, equivalent to those used with BBFs fertilization, co-applied with low and high N rates (90 and 180 kg N ha−1). BBF produced at 800 °C reduced yield-scaled N2O emissions by 32% as compared to the urea treatment, and by 60%, as compared to the combination of raw biochar with urea. This reduction was attributed to the slow rate of N release in BBF. On the contrary, the co-application of low rates of biochar with urea increased yield-scaled N2O emissions as compared to the fertilization with urea alone. Low rates of biochar (1.4–3.1 t ha−1) reduced yield-scaled N2O emissions only with a high rate of N fertilization. High-pyrolysis-temperature biochar, co-applied with synthetic fertilizer, or used to produce BBFs, demonstrated lower yield-scaled N2O emissions than biochar produced at a lower pyrolysis temperature. This study showed that BBFs are a promising fertilization strategy as compared to the co-application of biochar with synthetic fertilizers.



中文翻译:

基于使用生物炭和生物炭基肥料减少产量规模 N2O 排放的施肥策略

新型施肥策略,例如使用生物炭基肥料 (BBF) 以及生物炭与矿物肥料的共同施用,在减少一氧化二氮 (N 2 O) 排放和减少农业生态系统氮损失方面显示出良好的结果。用萝卜进行了两项温室实验,以评估:(1) 与同时施用原始生物炭和尿素相比,使用在 400 或 800 °C 下生产并富含尿素的 BBF 可减少产量规模的N 2 O 排放; (2)低比例原始生物炭的N 2 O减排潜力,相当于与BBF施肥一起使用的生物炭,并与低和高施氮量(90和180 kg N ha -1)共同施用。在 800 °C 下生产的 BBF 降低了 N 2产量与尿素处理相比,O 排放量减少了 32%,与生生物炭与尿素的组合相比,O 排放量减少了 60%。这种减少归因于 BBF 中氮释放速率缓慢。相反,与单独使用尿素施肥相比,低比例生物炭与尿素的共同施用增加了产量规模的N 2 O排放量。低生物炭用量(1.4–3.1 t ha -1 )仅在高施氮量的情况下才能减少产量规模的 N 2 O 排放量。高热解温度生物炭与合成肥料共同施用或用于生产 BBF,表现出较低的产量规模 N 2O排放量低于在较低热解温度下产生的生物炭。这项研究表明,与生物炭与合成肥料的共同施用相比,BBF 是一种有前途的施肥策略。

更新日期:2023-09-09
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