吉林农业大学学报2024，Vol.46Issue(5)：785-793,9.DOI:10.13327/j.jjlau.2024.20222
生物炭包覆尿素在黑土中施用特性和环境效应
Application Characteristics and Environmental Effects of Biochar Coated Urea in Black Soil
摘要
Abstract
In order to achieve the goal of reducing nitrogen fertilizer application and increasing effi-ciency,urea particles were coated with corn stalk biochar and rosin binder of different concentra-tions.Four kinds of corn stalk biochar coated urea 3.4%biochar coating amount(CU1),6.8%biochar coating amount(CU2),7.8%biochar coating amount(CU3)and 8.6%biochar coating amount(CU4)were prepared,respectively.Soil column leaching method and cultivation experiment were used to in-vestigate the nitrogen accumulation and release rate in black soil,the application characteristics in black soil,and the impact on greenhouse gas emissions.The results showed that compared with urea(U),four kinds of biochar coated urea increased with the increase of biochar coating amount,the cu-mulative nitrogen release rate of corn straw biochar coated urea was significantly decreased by 1.9%to 15.7%(P<0.05);Biochar coated urea increased the content of ammonium nitrogen in black soil and significantly reduced the content of nitrate nitrogen;the nitrification inhibition rate increased with the increase of biochar coating amount,and the treatment with CU4 significantly increased by 2.52%(P<0.05)compared to CU1;Compared with urea(U),the nitrogen use efficiency of four kinds of biochar coated urea in black soil was significantly increased by 1.4%to 6.1%(P<0.05),and the yield of Chinese cabbage increased by about 1.1-1.3 times;Biochar coated urea also sig-nificantly reduced the cumulative emissions of N2O(18.7%-46.3%),CO2(48.5%-58.9%),and CH4(8.8%-24.6%)produced during the planting process(P<0.05),and the comprehensive warming po-tential(GWP)was significantly reduced by 41.9%-55.9%(P<0.05).In summary,biochar coated urea can improve the yield of Chinese cabbage and nitrogen utilization efficiency,and also reduce soil greenhouse gas emissions,with CU4 being the best.关键词
黑土/生物炭包覆尿素/氮素累积释放率/氮素利用率/环境效应Key words
black soil/biochar coated urea/accumulative release rate of nitrogen/nitrogen utiliza-tion rate/environmental effect分类
农业科技引用本文复制引用
徐凯,吕子逸,薄雪,郭美希,刘淑霞,王呈玉..生物炭包覆尿素在黑土中施用特性和环境效应[J].吉林农业大学学报,2024,46(5):785-793,9.基金项目
国家重点研发计划项目(2018YFD0201300) （2018YFD0201300）
