不同施肥处理对保护地土壤非交换性钾释放能力的影响

以沈阳农业大学蔬菜保护地长期定位试验为基础,系统研究了长期定位条件下,不同施肥处理对蔬菜保护地土壤非交换性钾释放能力的影响。结果表明,不同施肥处理土壤非交换性钾的释放量和释放速率不同,有机肥和无机肥配施的土壤的释放量和释放速率大于单施化肥的各个处理;其中氮、钾肥配施处理的释放量和释放速率最高,而氮、磷肥配施处理最低。

Effects of Different Fertilization on Releasing Capacity of Non-exchangeable Potassium in Vegetable Soils

The effects of different fertilization treatments on the characteristics of inorganic potassium were studied in a long-term experiment in the vegetable greenhouse of Shenyang Agricultural University.The results showed that the releasing amount of non-exchangeable potassium was different in different fertilization treatments.Compared to the treatment with inorganic fertilizer only,the combining use of rganic and inorganic fertilizers increased the releasing amount and rate of potassium.The highest releasing amount and rate of non-exchangeable potassium came from the combining application of N-K fertilizers,and the lowest from the combining use of N-P fertilizers.