【摘要】 再生水灌溉的安全开展取决于合适的灌溉水质和灌溉制度,为了探明生活污水用于短生育期作物灌溉的可行性并寻求适宜的灌溉制度,以小白菜作为研究对象,采用2种水质(清水、再生水)和4个灌水下限(60%、70%、80%和90%的田间持水率)的两因素盆栽试验,研究了不同灌水下限下再生水灌溉对作物产量和全氮、全磷、重金属(Cu、Cd和Pb)等品质指标以及对土壤盐分、肥力和重金属的影响。结果表明:再生水灌溉对小白菜产量的影响较小,对小白菜吸收氮、磷和重金属的能力影响不显著,而小白菜对不同重金属的吸收能力表现出显著的差异。与清水相比,再生水灌溉条件下土壤有机质、速效氮和速效磷均有增加,且与灌水下限有显著的正相关,同时也会导致土壤盐分的增加、而土壤重金属无明显差异。总而言之,再生水适用于小白菜的灌溉,但不能直接移用清水灌溉的灌溉制度。更多还原

【Abstract】 Whether wastewater irrigation can proceed safely depends on proper wastewater quality andreasonable irrigation scheduling. In order to investigate the feasibility of domestic reclaimed water irrigation forcabbage and its proper irrigation schedule, pot trials were carried out with two kinds of water, i.e. EM treateddomestic waste water(RW) and clean water(CW), and four lower limitations of soil moisture(60%, 70%, 80%and 90% of field capacity) were set. Cabbage yield and qualities such as total nitrogen, phosphorus and heavymetal(Cu, Cd and Pb) were investigated, with available nitrogen, available phosphorus, organic matter, EC andheavy metals in soil were examined. The results confirmed that the effect of wastewater irrigation on cabbageyield and absorption of nitrogen, phosphorus and heavy metal was not obvious, and the absorption ability ofcabbage differed for metal sorts. Reclaimed water irrigation caused to augment of organic matter, availablenitrogen and available phosphorus in soil, and the augment was relevant to irrigation lower limitation. In short,domestic reclaimed water could be used to short term irrigation for cabbage, and the irrigation schedule couldn’ t adopt the indexes of clean water irrigation.更多还原