应用土壤剖面无机氮进行冬小麦氮肥基肥推荐的研究

The study of applying soil mineral nitrogen(Nmin) to recommend N base dressing in winter wheat

通过 6水平氮肥肥料试验 ,研究了冬小麦播前 0～ 2 0cm、0～ 4 0cm、0～ 6 0cm、0～ 80cm、0～ 10 0cm土层初始无机氮与冬小麦产量之间的相关性 ,并以此为基础 ,探索了以 0～ 2 0cm土层无机氮量作为氮肥基肥推荐的可行性 ,得出了诊断推荐基肥模型。

Based on the field experiments of six levels of nitrogen fertilizer in winter wheat,the correlation of initial soil mineral nitrogen in 0～20 cm? 0～40 cm? 0～60 cm? 0～80 cm? 0～100 cm before winter wheat seeding and its yields were studied,and the probability of using soil mineral nitrogen in 0～20 cm to recommend N base dressing was discussed in this paper,and N base dressing recommendation models based on the diagnosis of soil mineral nitrogen was attained here.