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Role of pyrolysis temperature on application dose of rice straw biochar as soil amendment

机译：热解温度对应用程序的作用剂量水稻秸秆生物炭作为土壤改良剂

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摘要

Abstract Biochar, an emerging soil amendment is conducive to carbon sequestration as well as plant and soil health. However, its benefits vary with the type of feedstocks, pyrolysis temperature, and the rate of application in soil. Herein, the effects of pyrolysis temperature and application dose of rice straw-derived biochar on soil physico-chemical properties were investigated. In this study, biochar prepared at two pyrolysis temperatures (350?°C and 550?°C) were applied in the soil at the rate of 5%, 10%, and 20%. After 90?days of incubation (at 50% of water holding capacity), a significant increase in soil pH and loss of nitrogen (up to 80%) was observed in biochar applied soils along with enhanced availability of phosphorous (14%) and potassium (18.8 fold). The addition of biochars (derived at both the temperatures) at a dose of 20%, elevated the carbon mineralization rate. Results demonstrated the crucial role of both pyrolysis temperature and application rate in achieving optimum efficacy of rice straw-derived biochar in soil carbon mineralization. The study suggests that rice straw biochar prepared under low (350?°C) pyrolysis temperature should be applied at a lesser rate (5%) to obtain higher agronomic and environmental benefits. Whereas, a higher rate of application (10%) is advocated if the pyrolysis is performed at a higher temperature (550?°C).
机译：抽象的生物炭,一个新兴的土壤改良剂有利于碳封存以及植物和土壤的健康。裂解原料的类型温度和土壤中应用程序的速度。在此,热解温度和的影响应用剂量的大米straw-derived生物炭土壤理化性质调查。两个热解温度(350 ?土壤中应用的速度5%,10%,和20%。持水量),显著增加土壤pH值和氮损失(80%)观察到生物炭土壤以及应用增强磷(14%)和可用性钾(18.8折)。(提取温度)的剂量20%,碳矿化率升高。结果证明了至关重要的作用热解温度和应用程序的速度大米straw-derived达到最佳效果生物炭在土壤碳矿化。表明水稻秸秆生物炭准备下低(350°C)热解温度应用速度较小(5%)获得更高农业和环境效益。更高的应用程序(10%)主张如果热解是在更高的执行温度(550°C)。

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