Effect of mixing waste clay and recycled compost on the proliferation of Bacillus that control crop diseases

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  • 廃白土の混合と戻し堆肥が堆肥中に存在する病害抑制Bacillus属菌の増殖に及ぼす影響
  • ハイハクド ノ コンゴウ ト モドシ タイヒ ガ タイヒ チュウ ニ ソンザイ スル ビョウガイ ヨクセイ Bacillusゾクキン ノ ゾウショク ニ オヨボス エイキョウ

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Abstract

This study aimed to produce a highly functional compost containing high concentrations of Bacillus that control crop diseases by managing the composting process. At a 10-15% mixing ratio of waste clay to dairy manure, the temperature of the manure was controlled well. By mixing in waste clay at this ratio, the disease-controlling Bacillus concentration was maintained at 10^6g^<-1> in the manure compost of a local dairy farm. Experiments using a small vertical fermentation system showed that by mixing waste clay and recycled manure, the disease-controlling Bacillus concentration increased from____ to 7.5×10^7g^<-1>. Using dairy farm manure in the fermentation system, we found that the Bacillus concentration increased to 2.0×10^9g^<-1> and was maintained at >10^8g^<-1> throughout the year. Our findings show that compost containing high concentrations of disease-controlling Bacillus can be produced in a vertical fermentation system by adding waste clay and recycled compost to the dairy farm manure.

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