A Study on the Application of Potash Fertilizer to Crops

Demonstration experiments indicated that when available potassium in soil was lower than 150mg/kg applying potash to maize, millet, wheat and potato could improve plant growth, enhance their ability of resistance increase the yields greatly. The yields of maize, millet, wheat and potato were increased by 8.5%～16 3%, 10.6%～17 8%, 9 8%～16 4% and 14 6%～22 3% respectively. The appropriate amount of potash fertilizer for maize and wheat was 120～180kg/hm 2, for millet was 150～225kg/hm 2 and for potato was 225～300kg/hm 2. Potash fertilizer should be applied to the soil with low level of available potassium and to potashphilous crops. It is appropriate to apply base fertilizer with methods of drill applying and hole applying.