东江源区果园面源污染防治最佳管理实践

Best management practices for non-point pollution prevention from orchard in Dongjiangriver source areas

为有效控制东江源区果园开发与经营活动产生的面源污染,以江西省定南县某规模化脐橙种植园为研究基地,基于最佳管理实践(BMPs)思想系统构建了东江源区果园面源污染的系统防治措施。结果表明,与对照区域(清耕法)相比,试验区采取BMPs措施后,果园径流排水中总磷、总氮、氨氮浓度分别降低了27.78%、57.93%和88.89%,对排水中总氮和氨氮的拦截效应达极显著水平(P<0.01)。

In order to control non-point source pollution from the development and management practice of orchard,by choosing a large-scale navel orange planting orchard as the research base,the controlling measures for non-point source pollution from orchard in Dongjiang river source were established according to the best management practices(BMPs)theory.Results revealed that,com⁃pared with that from the contrasting area(clean tillage treatment),after taking BMPs,concentrations of TP,TN and NH4+-N in runoff from testing area in the orchard were reduced by 27.78%,57.93%and 88.89%respectively,and the interception effect of TN and NH4+-N in the runoff was very significant(P<0.01).