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在砂培试验中,设置了0、1?5、4?0G/KGK2O施钾水平,3个施磷水平保持一致(0?10G/KGP2O5),玉米分别在网室(低温)及温室(常温)中生长,待玉米长至5叶期时测定植株的钾磷吸收状况.结果表明,温室及网室中玉米生长因施钾而受到显著影响,以施用1?5G/KGK2O最有利于玉米地上部及根的生长,而其中又以网室(低温)中的生长促进效果更为显著.无论是在温室还是在网室中,施用钾肥均使玉米植株比根长显著下降.试验进一步表明,低温下施钾促进了植株对钾的吸收,同时对植株根冠部磷含量均产生显著影响,过量施钾降低了玉米根冠部磷的含量及吸磷总量,降低了单位根长吸磷量.“,”A pot experiment with 3 potassium application levels,0,1 5 and 4 0 g/kg(K 2O)was conducted at two temperatures to study the effect of potassium fertilizers on the growth and nutrient uptake of maize The results demonstrated that the growth of maize with 1 5 g/kg(K 2O),especially at lower temperature,is better than the other two treatments The results also indicated that,at low temperature,potassium application improved K uptake by plants and too higher potassium application results in decrease of P...