干旱地区农业研究Issue(4)：69-74,93,7.DOI:10.7606/j.issn.1000-7601.2015.04.11
生物质炭与不同形态氮肥配施对黄绵土氮素矿化的影响
Effects of biochar additions combined with three nitrogen fertilizer levels on soil nitrogen mineralization in loessal soil
摘要
Abstract
The laboratory experiment was conducted to investigate the impacts of biochar incorporation on soil nitro-gen mineralization and the accumulation of inorganic nitrogen in loessal soil .The results illustrated that application of chemical nitrogen fertilizer significantly increased the accumulation of inorganic nitrogen in the soil and reduced nitrogen mineralization rates after the peak of inorganic nitrogen release .Compared with nitrate nitrogen fertilizer ,amide nitrogen fertilizer and ammonium nitrogen fertilizer obviously reduced the nitrogen mineralization rate .Biochar additions reduced the ammonification ,nitrification ,net nitrogen mineralization rates by 64 .9% ,44 .6% ,and 47 .7% after the peak of in-organic nitrogen release , repectively .Moreover , the inhibition effect of biochar on rates of nitrogen mineralization was high at low soil moisture content .However ,there was no significant differences in nitrate fertilizer and ammonium fertiliz-ers treatments .The biochar additions reduced cumulative inorganic nitrogen in either amide fertilizer or ammonium fertil-izer treatment ,especially under low soil moisture content .In summary ,application of amide nitrogen fertilizer and am-monium nitrogen fertilizer combined with biochar reduced the accumulation of inorganic nitrogen efficiently ,thereby re-ducing the risks of nitrogen losses .关键词
旱地土壤/生物质炭/硝态氮/铵态氮/土壤氮素矿化Key words
dryland soil/biochar/nitrate/ammonium/soil nitrogen mineralization分类
农业科技引用本文复制引用
袁瑞娜,赵英,张阿凤,刘小玉,潘小莲..生物质炭与不同形态氮肥配施对黄绵土氮素矿化的影响[J].干旱地区农业研究,2015,(4):69-74,93,7.基金项目
陕西省科学技术研究发展计划项目（2013KW－19－02）；“863”项目（SS2013AA100904）；国家自然科学基金 （）
