Some microorganisms found in soil are beneficial for plant growth. These beneficial microorganisms are cultured in pure form and then multiplied, and then applied to the soil like fertilizer or attached to seeds. They are also called microbial fertilizers. A typical example is the rhizobia found in legume crops. These bacteria live symbiotically in the roots of legume plants such as soybeans, fixing nitrogen from the air and converting it to ammonia, which can then be used by plants. They are used by sprinkling them on soybean and other seeds. Source: Heibonsha World Encyclopedia, 2nd Edition Information |
土壌中に存在する微生物のなかには植物の生育に有用な働きをするものがある。このような有益な微生物を純粋に培養して増やし,肥料のように土に施用したり,種子に付着させるものをいう。微生物肥料ともいう。代表的な例として,マメ科作物の根粒菌がある。このバクテリアはダイズなどのマメ科植物の根内に共生して空気中の窒素を固定してアンモニアにかえ,植物が利用できるようにしている菌であり,ダイズなどの種子にまぶして利用する。
出典 株式会社平凡社世界大百科事典 第2版について 情報 |
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