中文摘要：

采用营养液培养和土壤盆栽试验相结合的方法,对40个玉米杂交种进行了典型钾营养效率的筛选,同时综合考虑品种的吸收和利用特性,以生物量、吸钾量、钾利用指数、钾敏感度为指标采用聚类分析方法,结合品种稳定性,筛选出典型钾营养效率玉米品种。结果表明,蠡玉18、永研4号、冀单31为高效敏感型,豫玉23为高效不敏感型,纪元1号、兴农998为低效敏感型,这为后续深层钾素高效吸收和利用机理的研究提供了基础材料,也对实际生产中因地制宜选择玉米种植品种有一定指导意义。

英文摘要：

In this study, the nutrient solution and soil pot cultural experiments were combined to screen the typical potassi- um （K） nutrient efficiency varieties among 40 maize hybrids. The typical varieties with different potassium nutrient effi- ciencies were screened under some indexes, such as the absorption and utilization characteristics of K of different maize vari- eties, comprehensively, the methods of cluster analysis based on the biomass, potassium absorption, utilization index and potassium sensitivity, the variety stabilities, et al. The results showed that three varieties （liyu 18, yongyan 4 and Jidan 31 ） were high-efficiency and high-sensitive. Then the variety of Yuyu 23 was the high-efficiency but low-sensitive. Jiyuan 1 and Xingnong 998 varieties were the low-efficiency but high-sensitive. This classification types not only provided the basic materials for the subsequent deep study on the mechanism of high K absorption and utilization, but also had some guiding significance in actual production to select the suitable maize planting varieties to use in local conditions.