Judging from the N apparent loss , optimize experiment design optimization and nitrogen control experiment Opt . N50 % involved with nitrogen can maintain soil inorganic nitrogen level and do not cause rapid loss of nitrogen .
从氮素表观损失量来看，养分管理模式试验的优化处理和氮调控试验的Opt.N50%处理的施氮量可以维持土壤无机氮水平又不会引起氮素急剧损失。
n50