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贵州山区不同海拔高度玉米吸收氮、磷、钾的规律，与以往结果比较生育前期积累缓慢；吸收速度最快的时期多１０天左右，且随海拔上升而延长。单位籽粒产量吸收量的次序是Ｋ_２Ｏ＞Ｎ＞Ｐ_２Ｏ_５；施肥处理小于对照；高海拔氮有增加、磷有减少趋势。
The laws of N, P and K uptake by maize at different altitudes in mountainous area of Guizhou Province were slower than the previous results. The period with the fastest absorption rate was about 10 days more and extended with the elevation. The order of K2O> N> P2O5 absorption per unit grain yield was lower than that of the control. Nitrogen increased at high altitude and phosphorus decreased.