农业环境科学学报2018，Vol.37Issue(5)：1023-1034,12.DOI:10.11654/jaes.2017-1265
添加硝化抑制剂、秸秆及生物炭对亚热带农田土壤N2O排放的影响
Effects of nitrification inhibitor,crop residues,and biochar applications on N2O emissions by subtropical agri-cultural soils
摘要
Abstract
The effects of a nitrification inhibitor(nitrapyrin),crop residues,and rice straw-derived biochar applications on N2O emissions by an acidic agricultural soil from Jiangxi Province(JX)and an alkaline agricultural soil from Sichuan Province(SC)were investigated using a laboratory incubation experiment.The results showed that nitrapyrin significantly reduced N2O emissions in both soils during the first stage (24 h)after addition,especially in the SC soil where the N2O emission was reduced by 62%.Biochar application significantly enhanced N2O emission in the JX soil,but its effects in the SC soil were not significant.In contrast,the effects of crop residue incorporation on soil N2O e-missions depended on the type and characteristics of the crop residues,the physicochemical properties of the soil,and how long the residues had been incorporated into the soil.Over the short term(24 h),alfalfa and rice straw significantly enhanced N2O emissions,whereas bagasse addition did not lead to any significant increases in N2O emissions from the SC soil.The N2O emissions in the JX soil were significantly en-hanced by rice straw application, but significantly inhibited by alfalfa and bagasse applications. Increasing the duration of incorporation weakened the effects of alfalfa and rice straw on N2O emissions,whereas the inhibition effect of bagasse on N2O emissions could be main-tained for 6 months.Overall,these results highlight the necessity to connect N2O mitigation strategies with soil types and properties when at-tempting to reduce N2O emissions.关键词
N2O排放/硝化抑制剂/秸秆/生物炭Key words
N2O emissions/nitrification inhibitor/crop residues/biochar分类
资源环境引用本文复制引用
赵颖,张金波,蔡祖聪..添加硝化抑制剂、秸秆及生物炭对亚热带农田土壤N2O排放的影响[J].农业环境科学学报,2018,37(5):1023-1034,12.基金项目
国家自然科学基金项目(41330744).The National Natural Science Foundation of China(41330744) （41330744）
