| Summary: | Effects of Increasing Additive Doses on the Productivity of Two Strains of Pleurotus ostreatus (Jacq.) P. Kumm. under the Casing Technique; and on Local Substrates in the D.R. of the Congo. The objective of the study was to evaluate the yield increase of P969 and HK51 strains of Pleurotus ostreatus (Jacq.) P. Kumm. by combining different local substrates with additives. The research took place in the ecological conditions of Eastern Democratic Republic of the Congo. The trial was established according to a split plot design with 3 factors: substrate type (bean vines and banana leaves), additive type (rice bran and cow dung); and additive doses (0, 5, 10 and 15%). The results showed that the bean vines substrates are more productive in terms of sporophore weight. The supplementation of the dung additives on bean vines allowed the increase in output as well as the supplementation of rice bran on banana leaves. However, beyond a 10% supplementation rate of rice bran on bean vines the yield falls and becomes lower than the control without additive. It has been observed that the choice of additive type and additive doses to be used may be influenced by the substrate nature in the production of P. ostreatus.
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