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采用田间试验与室内分析相结合的方法,研究了长期定位施肥条件下,不同施肥处理对蔬菜保护地土壤钾含量的影响,结果表明:保护地土壤各不同施肥处理中全钾的含量发生了显著的变化,表现为长期单施钾肥的处理土壤全钾含量较高,而有机肥施用对土壤全钾含量的影响却不大。有机肥的施用可以明显提高土壤缓效钾和速效钾的含量,氮磷钾养分比例协调对于土壤速效钾含量发挥起到比较大的促进作用,表现为BNPK处理速效钾含量最高。
The effects of different fertilization treatments on the soil potassium content in vegetable soils under long-term fertilization were studied by field experiments and laboratory analysis. The results showed that the content of total potassium in different fertilization treatments in protected soils occurred significantly The results showed that the total K content in the soil treated with K application for a long time was relatively high, while the application of organic manure had little effect on the K content in the soil. The application of organic manure could obviously increase the contents of slow-acting potassium and available potassium in soil, and the coordination of N, P and K nutrients played a significant role in promoting the availability of available K in soil. The results showed that the content of available potassium in BNPK was the highest.