灌溉排水学报2017，Vol.36Issue(6)：87-94,8.DOI:10.13522/j.cnki.ggps.2017.06.016
生物质炭对稻田氮素淋失和氧化亚氮排放的影响
Impact of Biochar on Nitrogen Leaching and Nitrous Oxide Emission in Paddy Soils
摘要
Abstract
Nitrogen leaching and emission as greenhouse gases are an important environmental issue in agricultur-al production. This paper investigated how optimizing fertilization and amending soil with biochar could reduce nitrate leaching and N2O emission from a paddy field in Yellow River Irrigation Region inNinxia. Biochar was ap-plied to soil at three rates (4.5, 9 and 13.5 t/hm2 per years), and no biochar amendment was taken as the control. The results showed that biochar amendment reduced leaching of nitrate and ammonium by 18.23%~26.03%and 28.86%~52.05%respectively. The C1 treatment (4.5 t/hm2) did not significantly reduce N2O emissions, but C2 (9 t/hm2) and C3 (13.5 t/hm2) did and reduced accumulative N2O emission by 25.13%and 28.88%, respectively. Amending soil with biochar increased the uptake of nitrogen by plant roots, thereby reducing nitrate and ammoni-um in soil as well as soil density, which is the main reason behind the reduction in nitrogen leaching and emis-sions from soil. Our results revealed that amending the paddy soil with biochar at 9 t/hm2 can effectively increase nitrogen uptake and reducenitrogen loss as a result.关键词
生物质炭/宁夏/引黄灌区/稻田/氮淋失/氧化亚氮Key words
biochar/Ningxia Yellow River irrigation region/nitrogen leaching/nitrous oxide emission分类
资源环境引用本文复制引用
高俊莲,王永生,张爱平,朱东海,刘汝亮..生物质炭对稻田氮素淋失和氧化亚氮排放的影响[J].灌溉排水学报,2017,36(6):87-94,8.基金项目
国家自然科学基金项目(31601834,31660957,41130748) （31601834,31660957,41130748）
宁夏科技创新先导资金项目(NKYJ-15-05) （NKYJ-15-05）
