DB15/T2698-2022表2产地土壤中各项污染物的指标中性土壤碱性土壤序号项目PH值6.57.5PH值7.51总镉，mg/kg0.300.402总铅，mg/kg40403总汞，mg/kg0.300.354总神，mg/kg2020总铜，mg/kg60606总铬，mg/kg1201207六六六，mg/kg0.050.058滴滴涕，mg/kg0.050.05注1：重金属（铬主要是三价）和砷均按元素量计。注2：六六六为四种异构体总量，滴滴涕为四种异构体总量。4.4土壤肥力应达到表3“低”及以上指标。表3荞麦产地土壤肥力指标土壤养分极低低中腐极高有机质，(%)0.580.580.650.650.760.760.800.80全氮，(g/kg)0.570.570.700.700.900.971.081.08有效磷，(mg/kg)4.14.15.65.69.19.110.610.6速效钾，(mg/kg)71717979939398984.5农田灌溉水质量应符合表4的要求。表4农田灌溉水质量指标序号项目限值1pH值6.58.52化学需氧量，mg/L603六价铬，mg/L0.104总铅，mg/L0.06总汞，mg/L0.0016总镉，mg/L0.0057总伸，mg/L0.058氟化物，mg/L1.0
