【摘要】 针对再生水灌溉潜在环境污染及食品安全问题,通过田间小区试验,研究了不同灌溉方法、灌水水质和灌水水平对土壤大肠菌群含量、马铃薯块茎表皮和组织内部大肠菌群含量影响。结果表明:收获后,加氯再生水交替灌溉处理表层土壤矿质氮显著高于其他处理,加氯再生水交替灌溉保持马铃薯产量的同时,增加了根层土壤氮素的可利用性及后效性;加氯再生水交替灌溉根层土壤大肠菌群数量显著低于其他灌水处理,尤其是加氯再生水交替灌溉马铃薯组织内部大肠菌群数量仅为46MPN/100g,低于马铃薯淀粉标准一级品规定。因此,加氯再生水交替灌溉兼具保障马铃薯卫生安全与节水高效双重功能的灌溉策略。更多还原

【Abstract】 In order to solve food safety and potential environmental pollution problems with reclaimed water irrigation,field experiments were conducted,soil residual nitrogen,soil coliforms,coliforms in tuber skin,coliforms in tuber inner with reclaimed water irrigation under different irrigation technology,water quality and irrigation amount were analyzed.The results indicated that:the content of mineral nitrogen of top soil layer under chlorine reclaimed water with alternate surface drip irrigation was significantly higher than the full subsurface drip irrigation,alternate subsurface drip irrigation,full furrow irrigation,alternate furrow irrigation,the yield of chlorine reclaimed water with alternate irrigation was no significantly than the full irrigation,root-layer soil coliforms of chlorine reclaimed water with alternate irrigation was significantly less than others,moreover,the coliforms content in the potato tissue of chlorine reclaimed water with alternate irrigation was only 46 MPN/100 g,less than standard of GB/T 8884 — 2007.Thus,chlorine reclaimed water with alternate irrigation was an optimizing irrigation strategy,meanwhile,it could ensure healthy of potato and could enhance irrigation water use efficiency.更多还原