Clack soybeans of noduleted and non-noduleted isolines were used for the study of acetylene reduction method in vivo to measure symbiotic N fixation in pots.

• 本文选用克拉克结瘤与不结瘤等位基因系大豆为实验材料,对乙炔还原活体测定盆栽大豆共生固氮方法进行研究。