土壤养分及PH值分级
标准
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义乌市土壤养分及PH值分级标准项目高中低12345(偏低)6(极低)有机质(g/kg),3030~2525~2020~1515~10,10全氮(g/kg),33~2.52.5~22~1.51.5~1,1缓效钾(mg/kg),600600~500500~400400~300300~200,200,150速效钾(mg/kg)150~120120~9090~5050~20,20(240极高),25(50以上极高)有效磷(mg/kg)25~2020~1515~1010~5,5阳离子交换量(cmol/kg),2525~2020~1515~1010~5,53容重(g/cm),1.51.5~1.31.3~11~0.7,0.7总盐量(g/kg),21~2,1PH值,8.5强碱8.5~7.5碱性7.5~6.5中6.5~5.5微酸5.5~4.5酸,4.5强酸全钾(%),2.082.08~1.661.66~1.251.25~0.830.83~0.42,0.42全磷(%),0.0880.088~0.06600066~0.0550.055~0.0440.044~0.022,0.022碱解氮ppm,150150-120120-9090-6060-30,30