Nanjing Agricultural University

Jiangsu New Ground Bio-fertilizer Engineering Center Co., Ltd

Xingming Yang

Qirong Shen

Biao Shen

Qiwei Huang

Lihua Chen

Xin He

Yanxia Liu

Yangchun Xu

The present invention relates to the antagonistic bacteria for controlling thewilt of continuous cropping banana and their microbial organic fertilizer. It belongs to technology of intensive agricultural production. The present invention separates two antagonistic bacteria NJN-6 and NJN-11 and produces the microbial organic fertilizer through inoculating the two said strains into pig manure compost and rapeseed cake compost to conduct solid-state fermentation. The microbial organic fertilizer is characterized in that in the fertilizer, the content of each of the antagonistic bacteria NJN-6 and NJN-11 is above 1&#xd7;108 cfu/g, total nitrogen is 4&#x2dc;5% (weight percent), above 90% (weight percent) of the total nitrogen is organic nitrogen, total nitrogen-phosphorus-kalium nutrient is 6&#x2dc;10% (weight percent) and organic matter is 30&#x2dc;35% (weight percent). The results of experiment showed the showed that the prevention rate of thewilt of banana reached more than 80% and the incidence rate can be controlled to less than 5% even on the seriously diseased terraces (seasonal incidence rate of 15% or more). The fertilizer can control the wilt effectively if they are applied to soil in successive years.

[object Object]

The present invention relates to the antagonistic bacteria that are used to prevent and eliminate tobacco bacterial wilt and their microbial organic fertilizer, which belong to the technology for agricultural intensive production. The present invention separates two antagonistic bacteria (NJL-25 andNJL-14) that have remarkable antagonistic action against the pathogens of tobacco bacterial wilt. Microbial organic fertilizer is produced from these antagonistic bacteria and organic compost. Wherein, the content of each of NJL-25 and NJL-14 is above 1&#xd7;10cfu/g, the content of total nitrogen is 4&#x2dc;5% (above 90% of the nitrogen is organic nitrogen), the content of total nitrogen-phosphorus-kalium nutrient is 6&#x2dc;10% and the content of organic matter is 30&#x2dc;35%. As indicated by experiments, after the microbial organic fertilizer is applied into soil, it will enable rapid multiplication of the antagonistic bacteria into a dominant microflora in the soil and achieve more than 97.6% of biocontrol rate of tobacco bacterial wilt in the soil suffering from tobacco bacterial wilt. If the microbial organic fertilizer is applied in the soil without continuous cropping obstacle in a long time, it can prevent the occurrence of the bacterial wilt of continuous cropping tobacco to a great extent.

Antagonistic bacteria for preventing and eliminating the bacterial wilt of continuous cropping tobacco and their microbial organic fertilizer

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Nanjing, China

Xingming Yang