大豆根瘤菌优良菌株与春大豆品种的亲和性研究

STUDIES ON COMPATIBILITY BTWEEN SUPERIOR INDIGENOUS SOYBEAN RHIZOBIAL STRAINS AND SOYBEAN CULTIVARS

以黑龙江大豆产区主栽品种合丰25、合丰30等为寄主。将从本地区不同品种采集的根瘤中分离的十多株快慢生大豆根瘤菌及引入的其它菌株接种上述栽培大豆。从中筛选出2178、2187等优良菌株.接种后大豆植株干重、全氮、全磷量分别较61A76(美国引进菌株)提高10～17％、56.7～78.3和14.6～19.6％。采用丸衣化的2178菌剂接种效果更佳。较61A76接种的植株干重、全氮、全磷分别提高27％、83.2％和39.2％。田间小区试验初步证明2178、2187接种后,增加了大豆植株的鲜重、干重、增加结荚数和百粒重;从而提高产量10％以上。

More than 10 Sinorhizobium fredii and Bradyrhizobium japcnicum strains isolated from the nodules of different soybean cultivars in the locality were used along with other introduced strains to inoculate Hefeng 25, Hefeng 30, two major production cultivars in the soybean -growing areas of Heilongjiang Province, for screening of superior inoculum strains. Results shewed that plant dry weight, total N, and total P of plants inoculated with strains 2178 and 2187 were 10- 17% , 56. 7-78. 3% , and 14. 6-19. 6% higher respectively, than those of plants inoculated with the widely applied inoculant strain 61A76 (introduced from the United States), Better results were achieved when seeds coated with strain 2178 inoculum were used. In comparison with the plants inoculated with 61A76, plant dry weight, total N, and total P increased 27 %, 83.2%, and 39. 2% , respectively, field plot experiments showed that inoculation, with strains 2178 and 2187 increased fresh weight, dry weight, pod numbers, and weight of 100 seeds of soybean plants, and yield increased more than 10%.