不同年代大豆品种根系性状演化的研究

 采用盆栽方法，对黑龙江省和吉林省的４２份不同年代大豆品种的根系性状进行了趋势研究。试验结果表明，不同年代大豆品种根系性状存在差异，２０世纪５０～９０年代，大豆品种的主要根系性状在苗期、花期、鼓粒初期３次取样中均表现为随年代推进而呈增加趋势，２０世纪９０年代品种根系最发达。大豆品种根系的演化向根重增加，根体积扩大，根表面积增加和侧根长度增长的方向发展。

Evolution of Root Characters of Soybean Varieties of Different Ages

In a pot experiment, the evolution of root characters of 42 soybean varieties of different ages which came from Heilongjiang and Jilin Provinces was studied. The results of the experiment showed that there were diferences in the root characters among soybean varieties of different ages. From the 1950s to the 1990s, the main root characters were that the root fresh weight, root volume, root surface, root dry weight, lateral root length increased with the lapse of time. The root system of the varieties in 1990s was relatively well developed compared with that of the varieties in other ages. The evolutionary trend of root system of soybean varieties tended to the increase of root weight, root volume, root surface and length of lateral root.