农田施用沼肥对降低辽东水源基地环境污染的作用

Effect of Biogas Manure Application on Abating Pollution in the Mountains Region of East Liaoning Province

通过沼肥和化肥的对比试验,研究农田施用沼肥对玉米产量及农田径流水质的影响。结果表明:应用沼渣施底肥、沼液追肥,可明显增加玉米产量,施用沼肥比施用化肥的增产7.6%～10.3%。农田施用沼肥比施用化肥减少土壤总磷、总氮及硝酸盐氮随地表径流和侧渗迁移,改善了入库水的水质。追肥处理后,施用沼肥的处理地表径流水中总磷的浓度仅为0.38mg·L-1,是同期同质化肥处理的84%;总氮浓度仅为6.3mg·L-1,同期同质化肥处理的76%;硝酸盐氮浓度仅为3mg·L-1,是同期同质化肥处理的71%。沼气生态工程改变了水源林区居民传统的生活能源消费结构,有效地保护了山林植被,改善了辽宁东部地区的生态环境。

The results from field experiments saowed that the various economic characters were improved obviously, the yield and income were increased after using solid bioga＇s manure for base fertilizer, while liquid biogas manure for applying fertilizer. The comprehensive utilization technology of bioga~,, could protect water resources conservation forests base of the eastern mountain area, improve the ecosystem environment and Farmer living environments.