农业环境科学学报Issue(2)：329-335,7.DOI:10.11654/jaes.2016.02.017
化肥配施生物炭对稻田田面水氮磷流失风险影响
Influence of combined synthetic fertilizer and biochar applications on nitrogen and phosphorus losses from surface water of paddy field
摘要
Abstract
Fertilization management is an effective measure for controlling non-point source pollution from paddy field. In this paper, nitro-gen and phosphorus losses from the surface water of paddy field were investigated during rice growth season under the same inputs of exoge-nous nitrogen but partial replacement of synthetic fertilizer by different rates of biochar(5 t·hm-2,10 t·hm-2 and 20 t·hm-2). Results showed that TN, NO-3-N, and NH+4-N concentrations in the surface water of paddy field reached a peak on the third day of fertilization, but de-creased rapidly thereafter. TP concentrations showed slow increases 2~4 days after fertilization, but rapidly declined to a stable state after that. Applying biochar had little influence on total phosphorus(TP)in paddy field. Water- soluble phosphorus had the same trend as TP concentration. The critical period to reduce nitrogen and phosphorus loads should be within 10 days after fertilization. Application of biochar mitigated the fluxes of nitrogen and phosphorus outputs from paddy field water by 39%~50%and 38%~50%, respectively. Combined appli-cations of synthetic fertilizer and biochar increased rice production slightly. Based on the recommended application rate of biochar(5 t·hm-2), the annual nitrogen and phosphorus outputs would be 16.83 kg·hm-2 and 1.89 kg·hm-2, respectively.关键词
面源污染/生物炭/稻田水/氮磷流失/生态效益Key words
non-point pollution/biochar/paddy field surface water/nitrogen and phosphorus loss/ecological benefits分类
农业科技引用本文复制引用
冯轲,田晓燕,王莉霞,欧洋,阎百兴,符雨..化肥配施生物炭对稻田田面水氮磷流失风险影响[J].农业环境科学学报,2016,(2):329-335,7.基金项目
国家水体污染控制与治理重大专项（2012ZX07201-004）；吉林省科技发展计划项目 （）
