| 刘遵奇,孟军,陈温福.玉米秸秆生物炭对尿素分解的影响[J].农业环境科学学报,2015,34(6):1142-1148. |
| 玉米秸秆生物炭对尿素分解的影响 |
| Effect of Corn Stalk Biochar on Urea Hydrolysis |
| 投稿时间：2015-01-01 |
| DOI：10.11654/jaes.2015.06.018 |
| 中文关键词: 生物炭 尿素分解 氨气 |
| 英文关键词: biochar urea hydrolysis ammonia violation |
| 基金项目:辽宁省教育厅高校优秀人才支持计划;云南省烟草科技计划项目"基于生物炭的植烟土壤改良技术研究与推广应用";公益性行业(农业)科研专项"秸秆移动床热解炭化多联产关键技术研究与示范(201303095);辽宁省科技攻关项目"生物炭暨秸秆炭化还田技术体系集成与产业化示范" |
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| 中文摘要: |
| 为了解生物炭施入土壤后对尿素分解及土壤无机氮积累的影响, 采用两种温度(300 ℃和600 ℃)下热解产生的玉米秸秆生物炭为试验材料, 通过土壤灭菌与不灭菌处理对比, 观察了生物炭施入土壤后对脲酶活性、尿素分解速度、无机氮积累、氨气排放和土壤pH的影响。结果表明:玉米秸秆生物炭在土壤中能够促进尿素的分解, 使外加尿素在2 d内水解完毕, 早于对照处理1 d;NH4+-N积累量和氨气的释放量均高于对照, 短期培养结束后碱解氮含量低于对照。生物炭能够通过刺激土壤氮的矿化作用和微生物对有效氮的固定作用加快氮素的短期循环。 |
| 英文摘要: |
| Recent studies have shown that biochar has potential to improve soil fertility and carbon sequestration. However, the effect of biochar on nitrogen transformation is poorly understood. The present study was carried out to determine the effect of corn stalk biochar(produced at 300 ℃ and 600 ℃) on urea-N hydrolysis. In a sterilization experiment, we examined urea hydrolysis rates, inorganic nitrogen accumulation and ammonia volatilization in soil amended with biochar. In biochar treatments, urea hydrolysis was accelerated, and it was complete in 2 days, one day earlier than in CK. More ammonia was volatized as a result of increased soil pH induced by biochar application, and more NH4+-N was accumulated. After 12 days of incubation, available nitrogen content was lower in biochar treatments than in CK, indicating that inorganic nitrogen might be partially immobilized. |
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