| 沙蒿生物质炭在沙土中的降解特征 |
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| 引用本文： | 侯建伟,索全义,段 玉,赵沛义,张 君,景宇鹏.沙蒿生物质炭在沙土中的降解特征[J].土壤,2017,49(5):963-968. |
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| 作者姓名： | 侯建伟 索全义 段 玉 赵沛义 张 君 景宇鹏 |
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| 作者单位： | 1. 铜仁学院乌江农林经济学院,贵州铜仁,554300;2. 内蒙古农业大学草原与资源环境学院,呼和浩特,010019;3. 内蒙古自治区农牧业科学院资源环境与检测技术研究所,呼和浩特 010031;内蒙古旱作农业重点实验室,呼和浩特 010031;农业部内蒙古耕地保育科学观测实验站,呼和浩特 011705;农业部武川农业环境科学观测实验站,呼和浩特 011705 |
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| 基金项目： | 国家自然科学基金项目(31260502)、公益性行业(农业)科研专项(201103005)和铜仁市科学技术局科技计划面上(自筹经费)项目(2017TRS19949)资助。 |
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| 摘 要： | 为明确不同炭化条件下沙蒿生物质炭的有机组分、炭化过程和降解特性。于不同炭化条件下无氧炭化制备沙蒿生物质炭并进行沙地封存。结果表明:H、O和N元素的质量分数及H/C、O/C和(N+O)/C均随炭化温度的升高和炭化时间的延长呈先降低后稳定的变化趋势,升温速率对其无显著影响。而C则呈相反趋势且均在炭化温度600℃、炭化时间60 min以后基本达定值,上述指标(H、O、N、H/C、O/C、(N+O)/C和C)的稳定值分别约为29.3 g/kg、79.8 g/kg、11.2 g/kg、0.40、0.07、0.08和879.7 g/kg。生物质炭的降解速率随着炭化温度的升高、炭化时间的延长和施用量的增大而降低,其半衰期为2~12年。综上,沙蒿的炭化既是有机组分富碳、去极性官能团的过程,同时也是芳香性增强、亲水性和极性减弱的过程,施用量和炭化温度是影响生物质炭降解的决定性因素。
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| 关 键 词： | 沙蒿 生物质炭 有机组分 沙土 降解周期 |
| 收稿时间： | 2016/9/24 0:00:00 |
| 修稿时间： | 2016/10/27 0:00:00 |
Degradation Characteristics of Artemisia Ordosica Biochar in Sandy Soil |
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| HOU Jianwei,SUO Quanyi,DUAN Yu,ZHAO Peiyi,ZHANG Jun and JIN Yupeng.Degradation Characteristics of Artemisia Ordosica Biochar in Sandy Soil[J].Soils,2017,49(5):963-968. |
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| Authors: | HOU Jianwei SUO Quanyi DUAN Yu ZHAO Peiyi ZHANG Jun and JIN Yupeng |
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| Institution: | Wujiang River Institute of Agriculture and Forestry Economics, Tongren University,College of Grassland, Resources and Environment, Inner Mongolia Agricultural University,Institute of Resources and Environment and Detection Technology, Inner Mongolia Academy of Agriculture & Animal Husbandy Sciences,Institute of Resources and Environment and Detection Technology, Inner Mongolia Academy of Agriculture & Animal Husbandy Sciences,Institute of Resources and Environment and Detection Technology, Inner Mongolia Academy of Agriculture & Animal Husbandy Sciences and Institute of Resources and Environment and Detection Technology, Inner Mongolia Academy of Agriculture & Animal Husbandy Sciences |
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| Abstract: | Artemisia ordosica biochars were prepared under anaerobic carbonization condition at different temperatures and added into the sand in order to identify their organic components, carbonization process and degradation characteristics under different carbonization conditions. The results showed that the mass fraction of H, O and N elements, H/C, O/C and (N + O)/Cdecreased first and then tended to stable with the increase of temperature and carbonization time, but they were not affected obviously by the heating rate, while C showed the opposite trend and it was near stabilized after carbonization temperature > 600℃ , the carbonized time > 60 min. The stable values of the above indexes were about 29.3 g/kg, 79.8 g/kg, 11.2 g/kg, 0.40, 0.07, 0.08 and 879.7 g/kg, respectively. Degradation rate of biochar was reduced with the increased carbonization temperature, extended carbonization time and increased amount of biochar, its half-life was about 2—12 years. In conclusion, the biomass heating pyrolysis is a process in which carbon enriched and polar functional groups cut, meanwhile aromaticity increased but hydrophilic and polarity weakened, and application amountand carbonization temperature are the decisive factors in influencing degradation of biochar. |
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| Keywords: | Artemisia ordosica Biochar Organic components Sand Degradation of cycle |
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