生物炭包膜尿素的制备及其固氮潜力的研究  

Preparation of Biochar Coated Urea and Its Nitrogen Fixation Potential

作　　者：王杰[1] 孙程万 郭建华 宁建凤 倪振宇 王弯弯 WANG Jie;SUN Cheng-wan;GUO Jian-hua;NING Jian-feng;NI Zhen-yu;WANG Wan-wan(School of Water Conservance and Hydroelectric Power,HUE,Handan 056038,Hebei Province,China;Hebei Key Laboratory of Intelligent water Conservancy,Handan 056038,Hebei Province,China;Institute of Agricultural Resources)

机构地区：[1]河北工程大学水利水电学院,河北邯郸056038 [2]河北省智慧水利重点实验室,河北邯郸056038 [3]广东省农业科学院农业资源与环境研究所,广州510640

出　　处：《节水灌溉》2024年第1期121-127,共7页Water Saving Irrigation

基　　金：广东省养分资源利用与耕地保育重点实验室开放课题基金(GD20230301);污泥生物炭增强固定重金属机制及其土壤应用风险评估的研究(ZD2015110)。

摘　　要：为了探究生物炭包膜尿素的缓释性能及对土壤固氮的影响,以300、500和700℃下制备的杨木生物炭为包膜材料制备了3种生物炭包膜尿素,采用间歇土柱淋溶试验对氮素的释放特征进行分析。结果表明,杨木生物炭对铵态氮和硝态氮具有较好的吸附性能,低温下制备的生物炭对铵态氮吸附效果更好;与尿素相比,施用生物炭包膜尿素土壤的总氮淋溶量减少了9.73%~14.67%,铵态氮淋溶量减少了25.28%~30.36%,硝态氮淋溶量减少了10.34%~18.38%;在同等施氮水平下,生物炭包膜尿素相较于尿素可以显著增加土壤铵态氮和硝态氮的含量。其中,土壤中铵态氮含量增加了66.4%~200.1%,土壤硝态氮的含量增加了477.9%~537.6%。因此,生物炭用作肥料的包膜材料具有广阔的应用前景。To investigate the slow-release performance of biochar-coated urea and its effect on soil nitrogen fixation,three types of biochar-coated urea were prepared from poplar biochar prepared at 300℃,500℃and 700℃as the coating material,and the nitrogen release characteristics were analyzed by the intermittent soil column leaching test.The results show that poplar biochar has a certain adsorption effect on ammonium nitrogen and nitrate nitrogen,and the biochar prepared at low pyrolysis temperature has a better adsorption effect on ammonium nitrogen.Compared with urea,the total nitrogen leaching amount of biochar-coated urea decreased by 9.73%~14.67%,the leaching amount of ammonium nitrogen decreased by 25.28%~30.36%,and the nitrate nitrogen leaching decreased by 10.34%~18.38%.At the same nitrogen application level,the content of ammonium nitrogen in soil increased by 66.4%~200.1%,and nitrate nitrogen in soil increased by 477.9%~537.6%.Therefore,biochar as the coating material for fertilizers has broad application prospects.

关 键 词：生物炭 包膜尿素 土柱淋溶 铵态氮 硝态氮 

分 类 号：S145.5[农业科学—肥料学]