固氮菌的筛选研究,国内外已有几十年了,许多实验研究的资料表明,自生固氮菌应用于农作物均有一定的增产效果。但很多报导反应,大田应用的增产效果是不稳定的,究其原因颇多,但受土壤因素影响较大。本文系将我们研究的初步结果作一小结,以供互相交流。 Azotobacter screening research, at home and abroad for decades, many experimental data show that autogenous Azotobacter used in crops have a certain effect of increasing yield. However, many reports have reported that the yield increase effect of field application is unstable. The reason for this is quite a lot, but it is greatly affected by soil factors. This article summarizes the preliminary results of our study for mutual exchange.