Percorrer por autor "Menino, Regina"
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- Black soldier fly - an invaluable weapon in the war for the sustainability of the agrarian economy and defense of the environmentPublication . Menino, Regina; Murta, DanielThe growing demographic pressure, worldwide, has been alerting our planet, in an increasingly alarming way, to a progressive food deficit and a growing degradation of the quality of the environment; thus, the urgent need for new alternatives for agricultural production (among others) has been revealing the potential of insects in the two aspects mentioned above. In this context, the black soldier fly has revealed an invaluable potential for the biological composting of the remnants of agricultural production, with the triple objective of eliminating potentially polluting products, producing food for livestock farming and producing organic fertilizers capable of competing with chemical fertilizers, without the harmful effects of the latter, and with a high potential for the sustainability of the productivity of agricultural soils. The present communication, based on the advances that scientific experimentation has shown in this area, intends to highlight the high potential of this dipteran in the desideratum in question, particularly in the context of a circular economy.
- BSF - time to change the fliesPublication . Menino, Regina; Murta, Daniel
- Cattle effluents, either composted or bio-digested by Black Soldier Fly larvae, in the fertilization of ryegrass in sandy soilsPublication . Menino, Regina; Lopes, Ivã; Semedo, José N.; Scotti-Campos, Paula; Murta, Daniel; Castelo-Branco, Amélia; Nestler, Cecília; Moreira, OlgaThe relative agronomic performance of two organic fertilizers - effluents from intensive cattle farming, after composting either by traditional aerobic methods (compost) or by bio-digestion by larvae of the black soldier fly (Hermetia illucens, BSF) (frass) - in the growth of annual ryegrass (Lolium multiflorum L.) on a sandy soil was evaluated. For this purpose, a pot trial was conducted in a semi-controlled greenhouse. Eight treatments were defined, with four treatments using the compost and four treatments using frass (with a 10% nitroamoniacal nitrogen supplementation in all treatments), in addition to a negative control without fertilization, and a positive control with exclusively chemical nitroamoniacal fertilization. Regarding the biomass production, the BSF frass displayed a higher potential than the compost, with a significantly higher production from an N endowment equivalent to 280 kg ha-1 (252 kg organic N + 28 kg mineral N). While the yields obtained with compost were stable when 350 kg ha-1 (315 kg organic N + 35 kg mineral N) were provided, the yields obtained with BSF frass revealed a tendency to continue to progress with higher doses. This could be justified by the fact that the P2O5 and K2O content of BSF frass is significantly higher than that of the compost, and these nutrients continued to be mineralized over time. Furthermore, the obtained results confirm the potentiating effect of mineral fertilizers in the maximization of biomass production, when associated with organic fertilizers in adequate proportions. In addition, it was verified that the addition of frass enhanced the water use by plants, which was significantly higher than the treatments with compost, regardless of the N endowment. It was concluded that mixing chemical and organic fertilizers positively impacts soil fertility and the sustainability of the production as a whole, by increasing productivities in a sustainable way.
- Hermetia illucens L. frass in promoting soil fertility in farming systemsPublication . Menino, Regina; Esteves, Catarina; Fareleira, Paula; Mano, Raquel; Antunes, Joana; Rehan, Iryna; Murta, Daniel; Moreira, OlgaFollowing a pot trial with annual ryegrass (Lollium multiflorum Lam. (Pooideae: Poaceae)), where the effect of chemical fertilization was compared with organic fertilization with Black Soldier Fly larvae frass (BSFF), obtained by bio-digestion of cattle production effluents, and with mixed fertilization in proportions of 25%, 50%, and 75% of BSFF, the effect on crop production and soil fertility was tested in three soils of different textures, namely, sandy soil (Gleyic podzol), calcareous soil (Haplic calcisol), and clay soil (Haplic fluvisol). On top of the previous experimental device, a second year of testing was carried out with sowing of the same crop, but without any fertilizer input in all the residual soils for the different further modalities. With regard to the second sowing cycle production, the results are supportive of the expectation that fertilization with BSFF has a superior capacity for soil fertility resilience (assessed in terms of the ability to maintain or even increase soil production in the following year, in the absence of any fertilizer application) in all the soils tested in this experiment, with a significantly greater difference in the treatment corresponding to fertilization with only BSFF compared to the exclusively chemical treatment, in all the soils tested. Furthermore, BSFF, preferably as a mixed fertilizer (in a proportion until 75%), is shown to be a promising alternative for Gleyic podzol in the production of ryegrass as in the resilience and promotion of soil productivity. As far as more fertile soils are concerned (as in the case of Haplic calcisol and Haplic fluvisol), BSFF has not proved promising in terms of immediate crop production.