Effects of Azospirillum amazonense Y1 on the growth of corn
1989
Lee, K.B. | Park, T.G. | Song, S.D. (Kyungpook National Univ., Taegu (Korea Republic). Coll. of Natural Sciences)
In order to clarify the effect of the associative nitrogen fixing bacteria on the growth of corn (Zea mays L. Suwon 19), we inoculated corn seedlings with Azospirillum amazonense Y1, a micro-aerobic and acid-tolerant nitrogen fixer, and analyzed the growth and dry matter production and changes of nitrogen and phosphorus quantity of the plant during the growing period. The inoculation of associative N-fixing bacteria increased the growth of height, leaf area, dry weight and total nitrogen quantity of the plant by 15.4 %, 65.4 %, 33.7 % and 38.0 %, respectively, on the day of 56th after sowing. Especially the inoculation of A. amazonense Y1 showed two to three-fold accumulation of phosphorus in each organ of plant. The associative bacteria accelerated the growth of the under ground parts more than those of the upper ground parts of corn plant, and caused decreases in T/R ratios
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