Abstract

BARBARO, L.A et al. Compost de guano de gallina en la composición de sustratos para la producción de plantines florales. Agriscientia [online]. 2013, vol.30, n.1, pp.25-35. ISSN 1668-298X.

Substrates formulated with different proportions (20, 50 and 80%) of three types of poultry compost (CGG₁, CGG₂, CGG₃) mixed with pine bark compost and commercial substrate were evaluated. The ten treatments were used to cultivate seedlings of walleriana Impatiens and Salvia splendens. Each substrate was characterised physically and chemically, and the survival, dry mass and calcium, magnesium, potassium and sodium in the leaf were evaluated in seedlings. Substrates with 20% and 50% among the three CGG presented the highest water retention capacity and, with 80% the highest air porosity. The substrates with 50% and 80% showed the highest values of pH (≥ 6.6), potassium and sodium. For the same proportions, CGG₂ and CGG₃ presented CE values > 1.1 dS cm^-1. The highest dry weight of the seedlings was achieved with the commercial substrate, the substrates with 20% of the three CGG and with 50% of CGG₁. These substrates showed a higher concentration of calcium and magnesium, and a lower concentration of potassium in the leaves. The best characteristics of substrates for the development of the seedlings tested were achieved in the substrates with 20% of the three CGG and with 50% of compost CGG₁.

Keywords : Substrate; Poultry compost; Flower seedlings.

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