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利用城市每年产生的炉渣覆盖土壤,既可改良土壤,又能减少污染。为此,我们于1988年在本院试验站的灌耕灰漠土上进行了炉渣覆盖改土研究。 试验地土壤含有机质1.66％,全氮0.081％,全磷0.080％,水解氮51.2ppm,速效磷17.7ppm,速效钾234.5ppm,总盐0.07％,pH8.1,前茬蔬菜。试验分炉渣覆盖和对照(不覆盖)两个处理,重复3次,小区面积33.3m~2。各小区4月6日覆盖炉渣2cm,之后安装土壤温度计,4月20日人工点播玉米(Sc704),4月12日开始测0,5,10cm土温(每天8,14,20时测3次),
Covering the soil with slag from the city each year can both improve the soil and reduce pollution. To this end, we carried out a study of slag covering and soil improvement on weathered gray desert soil in our laboratory at 1988. Soil organic matter content 1.66%, total nitrogen 0.081%, total phosphorus 0.080%, hydrolyzed nitrogen 51.2ppm, available phosphorus 17.7ppm, available potassium 234.5ppm, total salt 0.07%, pH8.1, the former crop of vegetables. Test sub-slag coverage and control (not covered) two treatments, repeated 3 times, the plot area of 33.3m ~ 2. Each plot covered the slag 2cm on April 6, and then the soil thermometer was installed. On April 20, artificial corn (Sc704) was planted. On April 12, the soil temperature was measured at 0,5 and 10cm (measured at 8, 14 and 20 times per day ),