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大豆接种根瘤菌,在生茬地上种植多表现出一定的增产效果,但在重茬豆田接种,效果则下降,甚至难以表现增产效果,这已被众多的实验所证实。近年来一些报导指出,大豆根廇菌接种效果之所以较差,有的是因土著根瘤菌数量多,竞争力强,导致接入菌种不能占据结瘤位置,有的是因接入菌种与栽培的大豆品种间亲合力较差,根瘤菌不易进入大豆根内,不能形成有力的共生固氮体系。为了探讨土著根瘤菌对生茬地和轮播地大豆的结瘤固氮关系。1984年我们对石河子地区145团8号田大豆的自然结瘤、固氮情况进行了调查,以提供在石河子地区有效地接种大豆根瘤菌的依据。
Soybean inoculation rhizobia, stubble planting in the plots showed a certain increase in yield, but in the reclaimed soybean field inoculation, the effect is reduced, or even difficult to show yield, which has been confirmed by numerous experiments. In recent years, some reports pointed out that the reason why soybean Rhizoctonia inoculation effect is poor, some because of the number of indigenous rhizobia, competitive, leading access to bacteria can not occupy the nodulation site, and some due to access to bacteria and cultivated soybean Poor affinity between varieties, rhizobia is not easy to enter the soybean root, can not form a strong symbiotic nitrogen fixation system. In order to investigate the relationship between indigenous rhizobia and nitrogen-fixation of stubble field and rotation of soybean. In 1984, we investigated the natural nodulation and nitrogen fixation of No. 145 soybean in the Shihezi region to provide basis for effective inoculation of soybean rhizobia in Shihezi region.