ABSTRACT

The objective of this study was to investigate the effect of different pyrolysis temperatures on the properties of produced bovine bone char and to evaluate their suitability as phosphorus resources in P-poor sandy soil. An incubation experiment was performed and comprised of five treatments: unamended soil (CK), soil amended with the bovine bone (SBB), soil amended with bovine bone char at 300 °C (SBBC300), soil amended with bovine bone char at 500 °C (SBBC500), and soil amended with bovine bone char at 700 °C (SBBC700). Our findings demonstrate that pyrolysis temperature greatly affects the chemical properties of bovine bone char. The results obtained from the incubation experiments showed that adding bovine bone char produced at different temperatures significantly increased Olsen-P in P-poor sandy. Olsen-P concentrations increased significantly with increasing incubating period. The highest Olsen-P values existed in SBBC500 treatment at all incubation periods. Compared to unamended soil, adding SBBC500 to the soil increased Olsen-P by 41.7%, 42.9%, 35.5%, and 31.6% after 7, 15, 29, and 47 days of incubation, respectively. Consequently, use of bovine bone char produced at 500 °C may be an alternative option for phosphorus as a renewable, economical, and environmentally friendly source.

摘要

本研究的目的是研究不同热解温度对生产的牛骨炭性质的影响，并评估其作为磷资源在缺磷沙土中的适用性。进行了孵育实验，包括五种处理：未改良的土壤 (CK)、用牛骨改良的土壤 (SBB)、在 300 °C 用牛骨炭改良的土壤 (SBBC300)、在 500°C 用牛骨炭改良的土壤C (SBBC500)，以及在 700 °C 下用牛骨炭改良的土壤 (SBBC700)。我们的研究结果表明，热解温度极大地影响了牛骨炭的化学性质。孵化实验结果表明，添加不同温度下产生的牛骨炭显着增加了贫磷沙质中的Olsen-P。Olsen-P 浓度随着培养时间的延长而显着增加。最高的 Olsen-P 值存在于所有潜伏期的 SBBC500 处理中。与未改良的土壤相比，在土壤中添加 SBBC500，在培养 7、15、29 和 47 天后，Olsen-P 分别增加了 41.7%、42.9%、35.5% 和 31.6%。因此，使用在 500 °C 下生产的牛骨炭可能是磷作为可再生、经济和环保来源的替代选择。