検索対象:     
報告書番号:
※ 半角英数字
 年 ~ 
 年

The Effect of $$gamma$$-sterilization of biofertilizer's carrier on the density of rhizobial inoculants

バイオ肥料担体の$$gamma$$線滅菌が接種根粒菌密度に与える影響

手島 光平; 鳴海 一成

Tejima, Kohei; Narumi, Issei

効率の良いバイオ肥料を開発するためには、接種菌の生存数を維持した状態で比較的長期間保存できることが必要不可欠である。バイオ肥料の保存中における接種菌密度の低下は、担体中に存在する微生物との競合も要因のひとつと考えられる。そこで、土壌を母材とした担体を用い、$$gamma$$線滅菌により競合相手となり得る微生物の密度を低下させた場合のバイオ肥料中での接種菌密度の変化を調べ、オートクレーブ滅菌及び非滅菌と比較した。その結果、滅菌担体では1, 2か月目に接種根粒菌密度の増加が見られ、その後徐々に低下するものの6か月後でも初期の菌密度を維持していた。1, 2か月目の接種根粒菌密度の増加は$$gamma$$線滅菌担体の方が大きい傾向が見られた。

The inoculants survival in the biofertilizer could be affected by the physical and chemical properties of carrier materials and by the competition with native microbes in the carrier. $$gamma$$-irradiation is expected to sterilize the carrier materials without changes in physical and chemical properties. In an effort to demonstrate the effect of $$gamma$$-sterilization, the survivals of inoculants were monitored to assess the shelf life of biofertilizer. As results, the inoculants density after 6-month storage was greater than the initial density in biofertilizers made from sterilized carriers, while that was significantly decreased in biofertilizers made from non-sterilized carriers. $$gamma$$-sterilization was superior to autoclave-sterilization in enhancing the survival of inoculants.

Access

:

- Accesses

InCites™

:

Altmetrics

:

[CLARIVATE ANALYTICS], [WEB OF SCIENCE], [HIGHLY CITED PAPER & CUP LOGO] and [HOT PAPER & FIRE LOGO] are trademarks of Clarivate Analytics, and/or its affiliated company or companies, and used herein by permission and/or license.