Abstract
DOI: 10.15414/afz.2014.17.04.100–108 Received 30. April 2014 ǀ Accepted 7. July 2014 ǀ Available online 24. November 2014 The impact of vermicompost application was assessed in a pot experiment carried out in a vegetation cage located in the area of the SUA in Nitra. The model crop was grain maize. Treatment 1 was a non-fertilized treatment. In treatments 2 and 3, vermicompost was applied in autumn at the same dose of 170 kg.ha-1 N. In treatments 4 and 5, vermicompost was applied in spring at the same dose of 170 kg.ha-1 N. In treatments 3 and 5, nitrogen was applied as the fertilizer LAD at dose of 60 kg.ha-1 N. The highest yield parameters were found in treatment where vermicompost was applied in spring with the addition of the LAD. In the treatments, in which industrial nitrogen was added, yield parameters were affected significantly more positively than in the treatments where only vermicompost wasapplied. Spring application affected yield parameters significantly more positively than the autumn application. The highest N content in the phytomass was found in the same treatment, where was found highest yield parameters of plants. The addition of the fertilizer LAD had a depressing effect on the P and K content in phytomass. The autumn application of only vermicompost influenced the P and K content more positively than the spring application. The addition of the LAD fertilizer had a positive effect on the Ca content. Keywords : vermicompost, maize, total chlorophyll, phytomass, macro-elements, phenological growth stages BBCH-scale
Highlights
In organic farming found use of a recovery of waste products with farming technology of earthworm in the genus Eisenia foetida, which in the gastrointestinal tract mixed digested organic matter with minerals, i.e. soil, thereby is created an organo-mineral complex secreted in the form of rollers i.e. casts, which having a positive impact on the physical, chemical and biological soil parameters
The statistically significantly highest content of total chlorophyll (BBCH 18) was formed in the treatment 5, where vermicompost was applied in spring (170 kg ha-1 N) together with mineral nitrogen (60 kg ha-1 N)
The lowest nitrogen content in the plants taken at the phenological growing stage BBCH 16 was recorded in the treatment, where vermicompost was applied in spring at a dose of 170 kg ha-1 N
Summary
In organic farming found use of a recovery of waste products with farming technology of earthworm in the genus Eisenia foetida, which in the gastrointestinal tract mixed digested organic matter with minerals, i.e. soil, thereby is created an organo-mineral complex secreted in the form of rollers i.e. casts, which having a positive impact on the physical, chemical and biological soil parameters. Vermicompost application positively affected the soil pH, reduces the hydrolytic acidity (Gutiérrez-Micely et al, 2007) and enhanced the enzyme activity of the soil (Lavelle and Martin, 1992). Available organic residues and microorganisms coming from vermicompost stimulated in soil degradation of polycyclic aromatic hydrocarbons (PAHs) (Wilson and Jones, 1993; Banerje et al, 1997; Wilson and Bouwer, 1997; Namkoong et al, 2002). Vermicompost application had a positive effect on yield parameters of tomatoes (Gutiérrez-Micely et al, 2007; Szczech, 1999), strawberry (Singh et al, 2008), maize (Gutiérrez-Micely et al, 2008), peppers (Aracon et al, 2005) and cucumber (Edwards et al, 2010)
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