采用大田试验方法,以地下水滴灌为对照,分析研究了不同比例农村生活污水再生水滴灌对作物根际土壤特性的影响。结果表明,再生水滴灌情况下,在土壤理化性状方面,土壤EC值高于地下水滴灌,而土壤pH与对照相比无显著差异;在土壤养分方面,与对照相比,再生水灌溉显著提高土壤有机质和土层土壤有效磷含量,但对碱解氮和速效钾含量的影响不显著;灌溉水中再生水比例越大,对土壤呼吸作用的促进作用越明显。因此,在滴灌条件下,只要农艺措施、灌溉制度适当,可以采取一定比例的农村生活污水再生水进行作物灌溉。
Reclaimed water drip irrigation is one of the effective measures to deal with the scarcity of water resources.Through field experimental method and taking irrigation with groundwater as contrast treatment,the influence of reclaimed water drip irrigation with rural domestic sewage on soil peculiarity in plant rhizosphere was studied in this paper.The results indicated that for the aspect of chemical characteristics of soil,the influence of drip irrigation with reclaimed water on soil pH was not obvious,but soil EC under drip irrigation with reclaimed water was obviously higher than that in the contrast treatment;for the aspect of soil nutrients,the contents of soil organic matter and available phosphorus under drip irrigation with reclaimed water were higher relatively,while the difference of the contents of alkaline hydrolytic nitrogen,and available potassium was not obvious.Higher concentration of the reclaimed water led to higher simulation effect on soil respiration.Therefore,reclaimed water drip irrigation with rural domestic sewage can be used for crop growth,as long as the agronomic measures and irrigation schedule are appropriate.