不同氮钾水平对马铃薯产量及钾素吸收的影响

为探讨马铃薯不同氮、钾肥用量和产量的关系以及对马铃薯产量的影响,以期为马铃薯生产提供参考依据,采用氮、钾2因素4水平盆栽试验研究了不同氮、钾营养对脱毒马铃薯会-2产量及钾素吸收特性的影响。结果表明:高氮中钾处理的平均单窝重、大薯块单窝重和产量均最高。钾肥对马铃薯产量的影响较大,随着钾肥用量的增加产量直线上升,当钾肥用量达到一定水平,产量维持在一个最高水平,再增加钾肥产量不再增加;随着氮肥用量的增加,马铃薯产量迅速增加直至达最高水平,继续增加氮肥用量,马铃薯产量有所下降;过多的施用钾肥使植株体内钾素含量增加,超过最高产量后吸收的钾素属于奢侈吸收。

Effects of Different Levels of Nitrogen and Potassium on Potato Yield and Potassium Uptake

Two factor experiment design with four levels of nitrogen and potassium were used in pot experiment to study the effect of potato yield with different amount of nitrogen and potassium fertilizer.The result showed that the average tuber weight per plant,large tuber weight per plant and tuber yield were the highest in potassium factor with high nitrogen treatment,the effect of potassium on potato yield was large,with the increase of potassium fertilizer amount,production skyrocketed.When the potassium amount reached a certain level,yields remained at a high level.With the increase of nitrogen amount,rapid increase in potato production until it reached the highest level.Continuing to increase nitrogen fertilizer amount,the potato yield decreased.Excessive application amount of potassium fertilizer increased the potassium nutrition level in the plant.The plant absorbing potassium more than the maximum yield was extravagant abasorption.