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通过对19种土壤的EUF—K各项参数的测定,以及玉米幼苗对钾耗竭状况的反映,综合分析后看出:影响EUF—K各项参数值和对钾选择吸附能力的强弱均与土壤含钾粘土矿物类型有关.以高岭石为主的土壤,不仅EUF—K各项参数值低,而且对钾没有或极弱的选择吸附能力.以云母为主的土壤,EUF—K各项参数值均高或偏高,对钾选择吸附能力介于以蛭石和高岭石为主的土壤之间.玉米幼苗吸钾总量与EUF—K容量(Q)值、钾总量及栽培期间土壤释放钾总量等的相关性、均呈极显著正相关、相关系数r值分别为0.9255,0.8986和0.9089(N=19).
Through the determination of EUF-K parameters of 19 kinds of soils and the reaction of corn seedlings to potassium depletion, we can see from the comprehensive analysis that all the parameters influencing EUF-K and the selective adsorption capacity to potassium are both Soil kaolinite clay mineral type related to the soil, mainly kaolinite, EUF-K not only low value of the parameters, but also has no or very weak selective adsorption capacity of potassium. Mica dominated soil, EUF-K The values of K and K were the highest or the highest, and the K adsorption selectivity was between that of vermiculite and kaolinite. The total potassium uptake and the EUF-K capacity, The correlations between total amount of potassium released from soils and soil during the period were extremely significant positive correlation with r values of 0.9255, 0.8986 and 0.9089 respectively (N = 19).