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自1980年以来,我们进行了“大麦叶位期施肥对器官生长发育影响”的研究。研究表明,不同叶位期,特别是茎生叶期(N-3～N 叶)施肥对穗、粒、重和株型等具有不同的促控效应,其中主茎第 N-4～N-3叶期施肥既是促蘖成穗又是控节防倒的关键时期,主茎第N一2叶期以前施肥是争取穗大粒多的决定性阶段;主茎第 N-1～N 叶(剑叶)期施肥是提高粒重的重要时刻。自起身至孕穗阶段,我们依据这些规律,结合早春不同苗情动态和土壤肥力,运用“叶位指标”进行促控模式的试验和研究,获得了较好的产量效果。
Since 1980, we conducted a study on “the effect of barley leaf stage fertilization on organ growth and development”. The results showed that fertilization at different leaf stage, especially in stems and leaves (N-3 ~ N leaves), had different promotion and control effects on ear, grain, weight and plant type. Among them, N-4 ~ 3 leaf stage fertilization is not only a key period for promoting tillering to panicles but also controlling falling, the main stage of N-2 leaf before fertilization is the decisive stage for obtaining large grains; spike N-1 ~ N leaves Fertilization is an important moment to increase grain weight. From the moment of getting up to the stage of booting, according to these laws, combining the dynamics of early spring seedlings and the soil fertility, we used the “leaf position index” to test and study the mode of promoting control and achieved better yield results.