Restraint of Over-applied Potassium on the Growth of Peanut
A sand pot culture experiment was carried out to study the effect of different potassium treatments on seed germination and seedling growth ,and analysed the poisonous reason of potash fertilizer in peanut. The results showed that the effect of K 2SO 4 treatment was better than that of KCl treatment with lower potassium level, but the effect of KCl was better than that of K 2SO 4 with higher potassium level.The poisonous degree increased with the increase of potash fertilizer.The poison of KCl treatment was more severe and its poisonous time occured early.The treatments of KCl and K 2SO 4 with K_2O 1 0 g/kg were best,indicating that it is safe to use lower K_2SO_4 fertilizer in practice.