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Positive effects of Corn steep liquor powder application on organic hydroponics
Release time:
2024-08-26
In organic hydroponics, corn steep water can control diseases by promoting the activity of rhizosphere microbial communities. For example, inhibiting bacterial wilt caused by Fusarium wilt; Fungal diseases caused by Fusarium oxysporum and airborne gray mold.
1: Corn steep liquor powder can provide rich nutrition for crops
Corn steep liquor powder NPK7-7-7, Containing 43% protein, 35% amino acids, various mineral nutrients, vitamins and other substances, 100% water-soluble; Applying corn steep powder to organic hydroponic systems, the organic nitrogen it contains is degraded into nitrate nitrogen through two consecutive microbial processes, providing sufficient nutrient supply for plants. corn steep powder can also promote root hair development, which may be due to its natural cytokinin content. At the same time, corn steep powder stimulates microbial activity, accelerates microbial growth and metabolism, and indirectly enhances its inhibitory effect on diseases.
2: Corn steep liquor indirectly inhibits diseases by stimulating microbial activity
In organic hydroponics, corn steep water can control diseases by promoting the activity of rhizosphere microbial communities. For example, inhibiting bacterial wilt caused by Fusarium wilt; Fungal diseases caused by Fusarium oxysporum and airborne gray mold.
Taking the inhibition of Fusarium oxysporum as an example, the application of corn steep water in organic hydroponics promoted the formation of rhizosphere microbial consortia, making the environment unsuitable for the growth of Fusarium oxysporum. Secondly, the microbial community inhibits the proliferation of pathogens and reduces their pathogenicity by inducing changes in their morphology; Furthermore, an ecosystem that allows coexistence with pathogens such as Fusarium oxysporum was developed.
It should be noted that the antibacterial effect of applying organic fertilizers such as corn steep liquor inhibits but cannot eradicate fungal pathogens. In addition, compounds produced by some microorganisms can stimulate the plant's defense system, thereby resisting diseases, such as the inhibition of gray mold.
3: The inhibitory effect on pathogens observed after the application of Corn steep powder is also influenced by the following factors
Microbial density: Corn steep liquor powder can stimulate the growth and metabolism of microorganisms, indirectly producing inhibitory effects on pathogens; Therefore, the inhibitory effect is also influenced by the microbial density in the hydroponic solution; Experiments have shown that low microbial density can significantly reduce or even completely lose the original inhibitory effect.
Environmental temperature: Experimental results have shown that the microbial community that inhibits the growth of fungal pathogens is temperature sensitive. When the environmental temperature is too high, the microbial community structure will change due to thermal shock, resulting in a decrease in inhibitory effect. At temperatures higher than or equal to 60 ° C, the inhibitory ability of the solution on pathogens will be completely eliminated; Therefore, it is necessary to control the ambient temperature well.
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