施用堆肥明显增加土壤中全氮的含量,增加幅度最大为过磷酸钙添加量为15%的堆肥。土壤富里酸碳(FA-C)在两年轮作后各处理都出现了不同程度的下降,土壤中胡敏酸的含量有显著增加。
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Two kinds of cationic water treatment agents, FQ-C and FA-C, with corrosion inhibiting and disinfecting functions are trial-produced by the reaction of a plant gum with quinoline and acridine.
以一种植物胶与喹啉和吖啶进行反应,试制得具有缓蚀-杀菌功能的阳离子型水处理剂FQ - C、FA - C。
Born in Athens about 467 B. C., Socrates was the son fa sculptor.
苏格拉底公元前467年生于雅典,他是一个雕塑家的儿子。
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