小麦施钾的增产效果及对钾素吸收的影响

Effects of Potassium Fertilizer on K Absorption and Grain Yield of Plants in Winter Wheat

1997～1998年在高水肥地进行了钾肥用量试验研究．结果表明，含速效钾245mg·kg-1的土壤施钾增产不显著，含速效钾209mg·kg-1的土壤施钾达到了显著的增产效果。施钾后，小麦植株干重、吸钾强度、吸钾数量明显提高。适宜施肥量（K2O）7．5～10kg／667m2，增产幅度18％～25％。

The study of the applied amount of potassium fertilizer in winter wheat was investigated under high fertility fields. The results showed that the K applied could increase the dry weight, K absorption rate and capacity of wheat plants. The increased yields were not markedly different in K applied than in control under 245mg/kg level of rapidly availablc potassium, but were sikniificantly higher in K applied than in control under 209mg/kg level of rapidly available potassium. The optimum amount of potassium fertilizer appied was 7. 5~ 10kg/667m2,and the grain yield increased by 18 % ~ 25 %.