高产小麦吸收氮素规律呈现“M”型 ,两个高峰出现在分蘖期和拔节期 ,磷和钾吸收量随生育进程逐步平稳增加 ,高峰出现在中后期。生产上 ,高产小麦氮素追肥应采取“前轻 (分蘖轻 )后重 (拔节—孕穗重 )中控 (越冬—拔节期控 )”的“M”型追肥法 The nitrogen uptake by high-yielding wheat showed “M” pattern, with two peaks at tillering and jointing stages, and the uptake of phosphorus and potassium increased steadily with the growth process and the peak appeared in the middle and later stages. Production, high-yielding wheat nitrogenous fertilizer should take the “light (tillering light) after the heavy (jointing - booting weight) in the control (winter - jointing stage control)” “M” top dressing method