土壤学报2012，Vol.49Issue(3)：526-534,9.
控释肥施用对小麦生长期N2O排放的影响
EFFECT OF CONTROLLED-RELEASE FERTILIZER (CRF) ON NITROUS OXIDE EMISSION DURING THE WHEAT GROWING PERIOD
摘要
Abstract
A field experiment was conducted to study effect of application rate (N O, 100, 200 and 270 kg hm-2) of controlled-release fertilizer (CRF) and urea on N2 O emission from the wheat cropping system. Seven treatments, i. e. CK, U100, U200, U270, C100, C200 and C270, were designed and implemented separately during the wheat growing period. Results indicate that application of either urea and CRF, increased total N, 0 emission during the wheat growing period exponentially from 32% to 164% with increasing N-fertilizer application rate (p < 0. 05 ). The increasing tendency was duller in Treatments CRF than in Treatments Urea. Compared with Treatments urea, Treatments CRF inhibited significantly N2O emission during the wheat growing period (p <0.05) , and the effect was enhanced with increasing application rate. Compared with that in Treatment CK, grain yield increased in a parabolic pattern from 24% to 43% in Treatments Urea and from 30% to 45% in Treatments CRF with increasing application rate (p <0. 05). Obviously the effect of Treatment CRF was slightly higher than that of Treatment Urea (p >0. 05). Specific N2O emission increased exponentially from 31% to 114% in Treatment Urea with increasing application rate (p<0.05) , and from 2% to 50% in Treatment CRF, showing while in parabolic pattern (p < 0. 05). CRF inhibited significantly specific N2O emission (p < 0. 05) , and the effect increased with increasing application rate. Significant positive correlations were observed between N2O flux and soil water content (p <0. 05) in all the treatments, while no significant linear correlation was found between N20 flux and soil NH+4-N and NO-3-N concentrations, or soil temperature (p>0. 05 ).关键词
控释肥/施氮量/N2O排放/产量/单位产量N2O排放/麦季Key words
Application rate of N-fertilizer/ N2O emission/ Grain yield/ Specific N2O emission/ Wheat sea son分类
农业科技引用本文复制引用
纪洋,刘刚,马静,李小平,徐华,蔡祖聪..控释肥施用对小麦生长期N2O排放的影响[J].土壤学报,2012,49(3):526-534,9.基金项目
科技部国际科技合作项目(S2012GR0080)、国家自然科学基金项目(40971154)、公益性行业(农业)科研专项(201103039)资助 （S2012GR0080）
