Effects of inoculating nitrogen fixing bacteria on agronomic characters in different sugarcane genotypes.

The present study was carried out to investigate the effects of inoculating nitrogen fixing bacteria in greenhouse on agronomic characteristics of different sugarcane genotypes.Six sugarcane varieties,viz.,GT24,GT9,YC84/153,GT18,CP65/357 and F172,were used as the materials and cultured under nitrogen-free culture condition,and the endophytic nitrogen fixing bacterium strain Y-1a was inoculated at 3-leaf stage in greenhouse.The plant height,stalk diameter,average internode length and average stalk weight in six sugarcane varieties were surveyed.The experimental results showed that the inoculation of the nitrogen fixing bacteria promoted the plant growth,and improved the plant height,stalk length,stalk diameter,average internode length and average stalk weight in all sugarcane varieties in certain degree as compared to the control.