Impact of Vermicompost as Component of Growing Medium on Phytomass Formation of Radish (Raphanus Sativus L.)

Abstract

In Slovakia more than a half of the landfill‘s waste consist of the biodegradable waste (BDW). Therefore the BDW composting can decrease significantly the production of the landfill gas as well as the financial and space requirements for landfills. However, the composts production have to be solved comprehensively, including their rational usage. In Slovakia the use of composts is ineffective if the location of their production is farther than 50 km, because of the high tranportation costs. The objective of the experiments was to determine the ratio of vermicompost in the soil growing medium in order not to decrease the yield quantity and quality of radish - the most commonly grown vegetable in the gardens in Slovakia. Five shares of vermicompost were tested in the soil substrate (0%, 10%, 20%, 25% and 50%). The results show that 50% share of vermicompost in the soil substrate, i.e. the ratio of vermicompost to soil 1:1, was not the optimal solution of the vermicompost usage. However, even this quantity of vermicompost did not have a negative impact on the weight of the aboveground and underground phytomass in comparison with the treatment without vermicompost. 50% share of vermicompost in the growing medium had the negative impact on the qualitative parameters of radish. It decreased the content of vitamin C and increased the content of nitrates in radish roots and leaves. Along with the higher share of vermicompost in the growing medium, the content of vitamin C was decreased in radish roots and leaves, and the content of nitrates in radish roots was increased. The roots of the biggest diameter, and consequently the highest yield of radish roots and leaves was formed in the treatment where the soil substrate consisted of four portions of soil and one p ortion of vermicompost (20% proportion of vermicompost).

Weight of Carrot Phytomass and Content of Vitamin C 100 Days after Seeding in Dependence of Vermicompost Quantity and Earthworms (<i>Eisenia fetida</i>) in Soil Substrate

“…The increasing contents Vc in the soil substrate (10, 20, 25 and 50%) increased the yield of carrot roots compared with the treatment without Vc 3.47, 6.00, 6.59 and 6.92 times (Table 2). This finding did not correspond with the facts of [62], who monitored the rise of roots weight in radish cultivation only up to the level 20% of proportions Vc in the soil substrate. The contents Vc in the soil substrate above the level 20% (25 and 50%) resulted in the fall of roots weight.…”

ESTABILIZACIÓN POR VERMICOMPOSTEO DE LODOS RESIDUALES APLICADOS EN LA PRODUCTIVIDAD DE ALBAHACA (Ocimum basilicum L.)

“…De acuerdo con diversos autores, el pH obtenido en vermicompostas de diferentes sustratos presenta Salas et al 2018, Kováčik et al 2018, por lo que la vermicomposta elaborada a partir de lodo residual y estiércol equino es óptima, ya que promueve la disponibilidad de nutrientes y limita la de metales pesados. La CE inició en 1.9 dS/m y al finalizar el proceso de vermicomposteo se obtuvo un valor de 1.15 dS/m (Fig.…”

Aplicación del bokashi en el mejoramiento de lodos deshidratados del proceso biorreactor de membrana (MBR) en la empresa Esmeralda Corp. Lima

“…En cuanto a los demás tratamientos T01 (promedio pH: 7.85), T02 (promedio pH: 7.74) y T03 (promedio pH: 7.60), se tiene un pH cercano a la neutralidad a diferencia del control debido a la adición del lodo deshidratado, que tiene como pH un valor de 6.6, haciendo disminuir el rango de pH, como se observa en la Figura 22. Según diferentes autores, el pH obtenido en la pila de bokashi varía de 7 a 8 (Santoya et al 2018, Kováčik et al 2018, Martínez et al 2018, por lo que el bokashi se elabora a partir de aguas residuales. el lodo es óptimo porque promueve la disponibilidad de nutrientes y limita la disponibilidad de metales pesados.…”