【摘要】 玉米对氮肥的吸收数量,在不同的生长发育阶段是不相同的。只有适时、适量地施肥,不断满足植株对肥料的要求,才能有效地提高玉米产量和施肥经济效益。经研究确定,河西灌区春玉米整个生育期施氮可遵循以下原则:种肥15％,拔节肥30％,大喇叭口肥55％,或种肥15％,拔节肥30％,大喇叭口肥40％,吐丝肥15％。更多还原

【Abstract】 Absorbing amount of nitrogenous fertilizer for corn is various at different growth period. In order to raise the corn production and utilization rate of nitrogenous fertilizer, the appropriate application of fertilizer at right moment is necessary. According to the results obtained,it is suggested that the principles of applying nitrogenous fertilizer to the spring corn at its whole growth period in Hexi irrigation area be as follows: the seed manure—15%, jointing period fertilizer—30%, the big-bell period fertilizer—55%, or the seed manure—15%, jointing period fertilizer—30%, the big-bell period fertilizer—40%, the vomit-silk period fertilizer—15%.更多还原