| 不同生物质炭对棕壤中磷素吸附解吸的影响 |
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| 引用本文： | 刘慧,张伟康,李蒋戈野,王青青,承睿,张少斌.不同生物质炭对棕壤中磷素吸附解吸的影响[J].土壤,2023,55(6):1198-1206. |
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| 作者姓名： | 刘慧 张伟康 李蒋戈野 王青青 承睿 张少斌 |
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| 作者单位： | 沈阳农业大学土地与环境学院,沈阳农业大学土地与环境学院,沈阳农业大学土地与环境学院,沈阳农业大学生物科学与技术学院,沈阳农业大学生物科学技术学院,沈阳农业大学 |
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| 基金项目： | 国家自然科学(41671293)和沈阳农业大学大学生创新创业训练计划项目(2022167;2022265)资助。 |
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| 摘 要： | 为了减少土壤磷素流失,提高磷肥利用效率,探究不同生物炭对棕壤中磷素吸附解吸行为的影响规律,以水稻秸秆、玉米秸秆和花生壳为原材料,利用限氧升温炭化法制备生物炭,通过批量吸附实验研究了生物炭种类和生物炭添加量对棕壤磷吸附解吸的影响。结果表明：水稻秸秆生物炭在添加量为0.4%时显著提高棕壤对磷的吸附量,花生壳生物炭和玉米秸秆生物炭则显著降低棕壤对磷的吸附量；等温吸附曲线表明,不同生物炭均未改变等温吸附曲线的变化趋势,均可用Langmuir方程和 Freundlich 方程进行描述(R2>0.93),其中 Langmuir 方程拟合效果更好,不同处理对磷的理论吸附量大小顺序为：水稻秸秆生物炭+棕壤>棕壤>花生壳生物炭+棕壤>玉米秸秆生物炭+棕壤；吸附动力学实验表明,不同生物炭均未改变磷吸附动力学曲线的变化趋势,在所有动力学模型中,准二级动力学模型最适合描述土壤对磷的吸附行为(R2>0.99),其次为准一级动力模型(R2>0.99)和Elovich动力学模型(R2>0.88)；三种生物炭均显著促进棕壤对磷的解吸,当生物炭添加量为≥0.2%时,水稻秸秆生物炭、玉米秸秆生物炭和花生壳生物炭,分别可提高棕壤对磷的解析率50%、70%和90%以上。由此可见,不同生物炭可提高棕壤对磷素的供应和利用,水稻秸秆生物炭在减少棕壤磷素流失、保护生态环境方面具有更大的应用价值。
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| 关 键 词： | 棕壤 生物炭 磷 吸附解吸 |
| 收稿时间： | 2022/12/3 0:00:00 |
| 修稿时间： | 2023/1/16 0:00:00 |
Effects of Different Biochars on Phosphorus Adsorption and Desorption in Brown Soil |
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| LIU Hui,ZHANG Weikang,LI-JIANG Geye,WANG Qingqing,CHENG Rui,ZHANG Shaobin.Effects of Different Biochars on Phosphorus Adsorption and Desorption in Brown Soil[J].Soils,2023,55(6):1198-1206. |
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| Authors: | LIU Hui ZHANG Weikang LI-JIANG Geye WANG Qingqing CHENG Rui ZHANG Shaobin |
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| Institution: | College of Land and Environment,Shenyang Agricultural University,Shenyang,College of Land and Environment,Shenyang Agricultural University,Shenyang,College of Land and Environment,Shenyang Agricultural University,Shenyang,College of Biological Science and Technology,Shenyang Agricultural University,Shenyang,College of Biological Science and Technology,Shenyang Agricultural University,Shenyang,College of Biological Science and Technology,Shenyang Agricultural University,Shenyang |
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| Abstract: | In order to reduce the loss of soil phosphorus, improve the utilization efficiency of phosphorus fertilizer, to explore the different biochar on phosphorus adsorption and desorption behavior in brown soil, we prepared the biochar with rice straw, corn straw and peanut shell as raw materials using the oxygen-limiting heating carbonization method, and studied the biochar species and biochar addition on the influence of brown soil phosphorus adsorption desorption through batch adsorption experiment. The results showed that rice straw biochar significantly improved the adsorption of brown soil when the biochar addition was 0.4%, while peanut shell biochar and corn straw biochar significantly reduced the adsorption of phosphorus to brown soil. The isothermal adsorption curves showed that, different kinds of biochar did not change the change trend of the |
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| Keywords: | Brown soil biochar phosphorus adsorption and desorption |
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