Nitrate content of the treatment that the percent of manure is 1.2% is lower in the same organic manure. Nitrate content of 1.2% corn stalk, chicken manure, pig manure and deer manure is respective 80.22mg/kg, 89.16mg/kg, 100.81mg/kg and 75.19mg/kg.

• 对硝酸盐含量的影响，在同种有机肥都是以1.；2%25施用量的番茄硝酸盐含量为最低，1