生物质炭对黑土吸附-解吸硝态氮性能的影响

发布时间：2018-06-09 23:55

  本文选题：玉米秸秆生物质炭 + 稻壳生物质炭　； 参考：《农业环境科学学报》2016年01期

【摘要】：为了探讨生物质炭对黑土吸附-解吸硝态氮性能的影响,减少黑土中硝态氮的淋失、提高氮肥利用率以及为农业废弃物资源化利用提供理论依据,采用培养试验,应用Langmuir方程和Freundlich方程,研究了添加不同来源(玉米秸秆、稻壳、松木)和不同添加比例(0.6%、1.2%、3.6%、6%)生物质炭对黑土中硝态氮(NO_3~--N)的吸附和解吸特征。结果表明,施用生物质炭可增加黑土对NO_3~--N的吸附量,且三种生物质炭的添加比例为3.6%时,土壤对NO_3~--N的吸附量最大;施用玉米秸秆生物质炭的黑土对NO_3~--N的吸附量最大(实际最大吸附量为0.929 mg·g~(-1)),施用松木生物质炭的黑土对NO_3~--N的吸附量最小(实际最大吸附量为0.578 mg·g~(-1))。施用生物质炭可降低黑土对NO_3~--N的解吸率,且三种生物质炭的添加比例为3.6%时,土壤对NO_3~--N的解吸率最低;添加玉米秸秆生物质炭的黑土对NO_3~--N的解吸率最低,添加松木生物质炭的黑土对NO_3~--N的解吸率最高。不同生物质炭对NO_3~--N的吸附能力表现为玉米秸秆稻壳松木;对其解吸能力表现为玉米秸秆稻壳松木。生物质炭及添加生物质炭的黑土对NO_3~--N的吸附过程符合Langmuir方程。
[Abstract]:In order to study the effect of biomass carbon on the adsorption and desorption of nitrate nitrogen in black soil, reduce the leaching loss of nitrate nitrogen in black soil, improve the utilization rate of nitrogen fertilizer and provide theoretical basis for the utilization of agricultural wastes, the cultivation experiment was carried out. Langmuir equation and Freundlich equation were used to study the adsorption and desorption characteristics of no _ 3-N _ 3-N in black soil by adding different sources (corn straw, rice husk, pine wood) and adding 0.6 ~ (1.2) and 3.6cm ~ (-6) carbon to black soil by using Langmuir equation and Freundlich equation. The results showed that the application of biomass carbon could increase the adsorption capacity of No3 N on black soil, and when the addition ratio of three kinds of biomass carbon was 3.6, the adsorption capacity of soil to NO3 N was the largest. The black soil with corn straw biomass carbon has the largest adsorption capacity of NO3C N (the actual maximum adsorption capacity is 0.929 mg / g ~ (-1), and the black soil applying biomass carbon of pine wood has the smallest adsorption capacity of no ~ (3-) N (the actual maximum adsorption capacity is 0.578 mg / g ~ (-1). Applying biomass carbon can reduce the desorption rate of NO3- + -N in black soil, and when the addition ratio of three kinds of biomass carbon is 3.6%, the desorption rate of NO3- -N in soil is the lowest, and the desorption rate of NO3- -N is the lowest in black soil added with biomass carbon of corn straw. The black soil added with pine biomass carbon had the highest desorption rate of NO3- N. The adsorption ability of different biomass carbon to no _ 3-N was shown as corn straw rice husk pine wood, and its desorption ability was corn straw rice husk pine wood. The adsorption process of no _ 3- N on the black soil containing biomass carbon and biomass carbon is in accordance with Langmuir equation.
【作者单位】： 吉林农业大学资源与环境学院;吉林省商品粮基地土壤资源可持续利用重点实验室;吉林省东辽县足民农业站;吉林农业大学动物科技学院;
【基金】：吉林省科技发展计划项目(20110202) 吉林省科技引导计划项目(201205057) 公益性行业(农业)科研专项(20110303) 现代农业产业技术体系建设专项(nycytx-38)
【分类号】：S153;X712
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本文编号：2001266