再生水灌溉对果岭草坪土壤的影响

Impact of recycled water irrigation on soil in green

使用自来水、二级再生水、三级再生水3种水质灌溉果岭草坪,每月表施草炭与石膏混合物、湿润剂、沙子3种基质。两年的研究结果表明:果岭的容重未曾呈现出显著变化(P>0.05);二级再生水灌溉后果岭土壤K+、Na+含量发生显著变化(P<0.05);果岭土壤EC(电导率)为0.38dS/m,比自来水、三级再生水灌溉处理分别显著高出0.20dS/cm、0.19dS/cm;表施草炭和石膏混合物后果岭土壤Ca2+、Mg2+含量分别为15 466.85mg/kg和1 415.36mg/kg,显著高于表施湿润剂和沙子;二级再生水含有丰富的营养元素,灌溉后土壤全氮、速效钾、速效磷、有机质含量一定程度上升高,从而为草坪草生长提供一定的营养物质。

Tap water,secondary recycled water and tertiary recycled water were used to irrigate green.Mean-while,the mixture of gypsum and peat,wetting agent and sand were topdressed monthly.Results of two years study showed that soil bulk density of green did not significantly change （P〉0.05）.However,the content of K＋ and Na＋ changed significantly after irrigation with secondary recycled water （P〈0.05）.In addition,the EC of soil irrigated with secondary recycled water was 0.38 dS/m ,which was 0.20 dS/m and 0.19 dS/m higher than that of soil irrigated with tap water and tertiary recycled water respectively （P〈0.05）.The content of Ca2＋,Mg2＋ was 15 466.85 mg/kg and 1 415.36 mg/kg after applying mixture of gypsum and peat,which was significantly higher than that in soil applied with wetting agents and sand.The content of total N,available K,a-vailable P and organic matter were increased in soil irrigated with secondary recycled water.Secondary recycled water was rich in certain chemical elements which may provide certain nutrients for turfgrass growth.