The results showed that the relative quantity of nitrogen uptaken by corns from soils was more than from fertilizers, and it was been vulnerably affected by waterlogging in summer.

• 结果表明：玉米吸收土壤氮素的比例高于对肥料氮的吸收，而且其对肥料氮的利用率低于小麦，并极易受夏涝的影响；