Fusarium wilt is a devastating disease which impacts watermelon production. Soil fumigation using dazomet followed by biological organic fertilizer was applied to suppress the Fusarium wilt disease. We propose that fumigation suppresses the soil indigenous community, especially the soil-borne disease pathogens, while the utilization of bio-organic fertilizer facilitates the recovery of the soil microbiome to a beneficial, suppressive state through the introduction of plant growth-promoting microorganisms. Greenhouse experiments showed that applied biological organic fertilizer after dazomet fumigation effective restrain the disease incidence with a 93.6% disease control. Fumigation strongly decreased soil microbial diversity and altered relative taxa abundances, suggesting the possibility of niche release by the resident soil microbial community. Fumigation followed by bio-fertilizer transformed the soil microbial community composition and resulted in higher relative abundances of beneficial microbial groups such as Bacillus (8.5 %) and Trichoderma (13.5 %), coupled with lower Fusarium abundance compared to other treatments. Network analysis illustrated that soil fumigation decreased interactions within the soil microbial community with less nodes and links while bio-fertilizer addition promoted node interactions. In addition, bio-fertilizer addition after fumigation resulted in the beneficial species becoming the key network connectors. Collectively, fumigation appears to release the resident soil niche resulting in lower diversity while the beneficial microbes introduced by bio-fertilizer addition colonize these niches, leading to a more complex community with fewer pathogens that suppresses Fusarium wilt disease incidence.
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Posted 15 Mar, 2021
On 24 Mar, 2021
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On 08 Mar, 2021
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On 07 Mar, 2021
Received 07 Mar, 2021
On 04 Mar, 2021
On 04 Mar, 2021
On 04 Mar, 2021
On 02 Mar, 2021
On 25 Feb, 2021
On 24 Feb, 2021
On 24 Feb, 2021
On 24 Feb, 2021
On 22 Feb, 2021
Posted 15 Mar, 2021
On 24 Mar, 2021
Received 23 Mar, 2021
Received 18 Mar, 2021
Received 16 Mar, 2021
On 08 Mar, 2021
On 07 Mar, 2021
Invitations sent on 07 Mar, 2021
On 07 Mar, 2021
Received 07 Mar, 2021
On 04 Mar, 2021
On 04 Mar, 2021
On 04 Mar, 2021
On 02 Mar, 2021
On 25 Feb, 2021
On 24 Feb, 2021
On 24 Feb, 2021
On 24 Feb, 2021
On 22 Feb, 2021
Fusarium wilt is a devastating disease which impacts watermelon production. Soil fumigation using dazomet followed by biological organic fertilizer was applied to suppress the Fusarium wilt disease. We propose that fumigation suppresses the soil indigenous community, especially the soil-borne disease pathogens, while the utilization of bio-organic fertilizer facilitates the recovery of the soil microbiome to a beneficial, suppressive state through the introduction of plant growth-promoting microorganisms. Greenhouse experiments showed that applied biological organic fertilizer after dazomet fumigation effective restrain the disease incidence with a 93.6% disease control. Fumigation strongly decreased soil microbial diversity and altered relative taxa abundances, suggesting the possibility of niche release by the resident soil microbial community. Fumigation followed by bio-fertilizer transformed the soil microbial community composition and resulted in higher relative abundances of beneficial microbial groups such as Bacillus (8.5 %) and Trichoderma (13.5 %), coupled with lower Fusarium abundance compared to other treatments. Network analysis illustrated that soil fumigation decreased interactions within the soil microbial community with less nodes and links while bio-fertilizer addition promoted node interactions. In addition, bio-fertilizer addition after fumigation resulted in the beneficial species becoming the key network connectors. Collectively, fumigation appears to release the resident soil niche resulting in lower diversity while the beneficial microbes introduced by bio-fertilizer addition colonize these niches, leading to a more complex community with fewer pathogens that suppresses Fusarium wilt disease incidence.
Figure 1
Figure 2
Figure 3
Figure 4
Figure 5
Figure 6
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