供钾水平对春大豆生育和营养体钾利用效率的影响

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，四种反应型

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

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.