Fumigation with Wood Vinegar: Effects on Soil and Watermelon Growth in Greenhouse

doi:10.11924/j.issn.1000-6850.casb18050045

Abstract

Abstract: Abstract:Wood vinegar is a substance formed from the liquefaction of flue gas during biomass pyrolysis process. Currently, there are no data about the roles of wood vinegar as a soil fumigant. We sprayed different volumes of wood vinegar on soil in greenhouse, took methyl bromide as a control to observe its antibacterial activity and effect on watermelon growth. The results showed that: soil pH value reduced by 0.10-0.31 units, while mineral nitrogen had no significant change with spraying 750-3000 kg/hm2 wood vinegar; in addition, the amounts of culturable bacteria, fungi and actinomycetes increased by 101%-132%, 38%-204% and 10%-58%; both Fusarium and Phytophthora reduced by 64%-316% and 12%-38%, respectively. Compared with methyl bromide, wood vinegar had weaker and shorter impacts on pathogens though having less negative effect on soil microflora; moreover, nitrogen mineralization might be partially inhibited and thus induced low content of soil mineral nitrogen; spraying too much wood vinegar would reduce the yield of watermelon. In conclusion, wood vinegar has a low value as a fumigant in the greenhouse soil.

CLC Number:

S472

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