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一、实验目的1.测定腐植酸钠溶液的 LD_(50)并与黄腐酸钠的 LD_(50)做对照。(黄腐酸钠的 LD_(50)分别为 111mg/kg 和202mg/kg)。2.了解动物死亡的主要原因。二、主要材料
I. Experimental purpose 1. Determine the LD 50 of sodium humate solution and compare it with the LD 50 of sodium fulvate. (The LD 50 of sodium fulvate was 111 mg/kg and 202 mg/kg, respectively). 2. Understand the main cause of animal death. Second, the main material