| 王冰,赵闪闪,秦治家,高强,娄玉杰,刘淑霞.生物质炭对黑土吸附-解吸硝态氮性能的影响[J].农业环境科学学报,2016,35(1):115-121. |
| 生物质炭对黑土吸附-解吸硝态氮性能的影响 |
| Effect of biochar on adsorption-desorption characteristics of nitrate nitrogen in black soil |
| 投稿时间：2015-07-31 |
| DOI：10.11654/jaes.2016.01.016 |
| 中文关键词: 玉米秸秆生物质炭 稻壳生物质炭 松木生物质炭 硝态氮 吸附 解吸 |
| 英文关键词: corn-stalk biochar rice-hull biochar larch biochar nitrate nitrogen adsorption desorption |
| 基金项目: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) |
| 作者 | 单位 | E-mail | | 王冰 | 吉林农业大学资源与环境学院, 长春 130118
吉林省商品粮基地土壤资源可持续利用重点实验室, 长春 130118 | | | 赵闪闪 | 吉林农业大学资源与环境学院, 长春 130118
吉林省商品粮基地土壤资源可持续利用重点实验室, 长春 130118 | | | 秦治家 | 吉林省东辽县足民农业站, 吉林 东辽 136615 | | | 高强 | 吉林农业大学资源与环境学院, 长春 130118
吉林省商品粮基地土壤资源可持续利用重点实验室, 长春 130118 | | | 娄玉杰 | 吉林农业大学动物科技学院, 长春 130118 | | | 刘淑霞 | 吉林农业大学资源与环境学院, 长春 130118
吉林省商品粮基地土壤资源可持续利用重点实验室, 长春 130118 | liushuxia2005824@163.com |
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| 中文摘要: |
| 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(NO3--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NO3--N的吸附量,且三种生物质炭的添加比例为3.6%时,土壤对NO3--N的吸附量最大;施用玉米秸秆生物质炭的黑土对NO3--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NO3--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NO3--N的解吸率,且三种生物质炭的添加比例为3.6%时,土壤对NO3--N的解吸率最低;添加玉米秸秆生物质炭的黑土对NO3--N的解吸率最低,添加松木生物质炭的黑土对NO3--N的解吸率最高。不同生物质炭对NO3--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NO3--N的吸附过程符合Langmuir方程。 |
| 英文摘要: |
| It is well documented that biochar can adsorb nitrate nitrogen(NO3--N) from water. However, few studies were available on the effects of biochar applications on adsorption-desorption properties of NO3--N in soil. In this study, an incubation experiment was conducted to assess the effects of different biochars(corn-stalk biochar, rice-hull biochar and larch biochar) at four application rates(0.6%,1.2%, 3.6%, and 6%) on adsorption and desorption of NO3--N in black soil. Results showed that biochar applications increased NO3--N adsorption, with the highest adsorption capacity occurred in soil added with 3.6% biochar. Of three biochars, corn-stalk biochar had the highest NO3--N adsorption capacity, which was 0.929 mg·g-1, whereas larch biochar had the lowest NO3--N adsorption, with only 0.578 mg·g-1. Applications of biochars reduced the desorption rates of NO3--N from soil. The lowest desorption was found at a biochar rate of 3.6%. On the contrary, corn-stalk biochar had the lowest NO3--N desorption while larch biochar displayed the highest desorption. The adsorption ability of NO3--N by biochars was:corn-stalk biochars > rice-hull biochar > larch biochar, but the desorption was opposite. The isothermal adsorption of NO3--N on soil amended with biochars could be well described by Langmuir isothermal equation. |
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