Effects of inoculation with tropical rice associative N2-fixing bacteria Azospirillum brasilense NO40 in the red paddy soil
固氮螺菌 (Azosprillum brasilense)NO40在红壤性水稻土上的接种效应

Effects of inoculation with Azospirillum brasilense NO40 isolatedfrom Egypt on rice growth and yields under different nitrogen fertilizer levels were investigated at Dongyang county of Zhejiang province. The results showed that the counts of colony grown on nitrogen-free medium isolated from rice rhizosphere and root were increased by inoculating with NO40 in contrast to the control, irrespective of the nitrogen fertilizer levels and rice growing periods. It was found that the plant height, chlorophyll content of the newly developed rice leaves were significantly increased after inoculating with NO40.