摘要： 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着影响，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着。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着下降。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着影响，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。

关键词: 玉米, 钾, 磷, 温度

Abstract: A pot experiment with 3 potassium application levels,0,1.5 and 4.0 g/kg(K₂O)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(K₂O),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 uptake and content of maize plants.

Key words: Maize (Zea mays L), Potassium, Phosphorus, Temperature

中图分类号: 

• S513.06