供钾水平对春大豆生育和营养体钾利用效率的影响

Effect on growth and vegetative potassium utilization efficiency of spring soybean varieties under two potassium supply levels

研究了不同钾水平下春大豆品种的生长发育特性、对钾的反应程度和营养体对钾利用效率的差异．结果表明，ＬＡＩ，ＲＧＲ和ＳＷｔ等性状品种间的差异达极显著水平．施钾处理能增加ＬＡＩ和ＳＷｔ，提高Ｒ１后的平均ＲＧＲ，但不同钾处理间未达显著水平．Ｒ１时两处理间和不同品种间Ｋ％和ＶＫＵＥ均达极显著差异．根据各春大豆品种对钾反应程度的差异和营养体钾利用效率的不同，可分为两大类。

Study on growth characters and different response,vegetative potassium (K) use efficiency under two K levels were conducted in this experiment. It was observed that the difference in LAI,RGR and SWt was signifcant at 0.01 between spring soybeans. The suppling K increased the LAI,LWR and RGR,but there was no obvious difference between K treatments. The K content and VKUE exhibited significant difference at 0.01 both for varieties and K treatments,respectively. It was suggested that there were two groups with four responsed types depended upon the difference in response to K supply and various of vegetative K use efficiency of the soybean varieties.