土壤2017，Vol.49Issue(5)：963-968,6.DOI:10.13758/j.cnki.tr.2017.05.016
沙蒿生物质炭在沙土中的降解特征
Degradation Characteristics of Artemisia ordosica Biochar in Sandy Soil
摘要
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.关键词
沙蒿/生物质炭/有机组分/沙土/降解周期Key words
Artemisia ordosica/Biochar/Organic components/Sand/Degradation of cycle分类
农业科技引用本文复制引用
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):963-968,6.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. （31260502）
