A utilização de resíduos industriais, como o lodo de curtume, em substratos para produção de mudas é uma alternativa para redução de custos de produção, e para destinação dos resíduos industriais. O cultivo de pimentas tem ganhado espaço no mercado brasileiro favorecendo principalmente a agricultura familiar, onde um dos desafios é diminuir o custo de produção. O objetivo do trabalho foi avaliar o efeito de diferentes concentrações de lodo de curtume bovino adicionado ao substrato comercial na germinação, desenvolvimento e qualidade de mudas de pimenta biquinho. O experimento foi conduzido em delineamento de blocos casualizados com 7 tratamentos, sendo dois substratos comerciais: Provaso® (TP) e Bioplant® (TL0); e cinco diferentes proporções de lodo desidratado (10, 30, 50, 70 e 90%) misturados ao substrato Bioplant®. Avaliou-se nesse experimento o percentual de germinação, características de desenvolvimento e Índice de Qualidade de mudas de Dickson (IQD). O potencial germinativo foi maior para os tratamentos com adição de lodo de curtume ao substrato comercial Bioplant®. Os melhores resultados para as características de desenvolvimento das mudas ocorreram com a adição de lodo desidratado ao substrato Bioplant® nos intervalos de 30 a 70% de lodo no substrato. O índice de qualidade de mudas foi maior para a mistura de 30% de lodo de curtume desidratado com Bioplant®.

The use of organic waste in agriculture has stimulated the search for technologies that reduce environmental pollution. Among the residues are the biochar and swine wastewater (SW), which incorrectly disposed cause negative impacts, however, when combined, they can enhance agricultural production, due to the synergism between both.In this sense, the objective was to evaluate the influence of doses of biochar, from conilon coffee straw, combined or not with swine wastewater diluted to 50% (SW50%), on the nutrient content in medium and clayey texture soils and in the corn plant tissue. The experiment was carried out in a greenhouse, with five doses of biochar, two irrigation waters and two soils, with three repetitions. The pH, P, K + , Ca +2 , Mg +2 , Zn +2 and Na + in the soil and N, P, K, Ca, Mg, Zn and Na in plant were evaluated. The addition of biochar in doses linearly increased the levels of P and K + in both soil textures, with synergy when irrigated with SW50%. The SW50% provided a nutrients increase in the corn plant tissue. The agricultural use of biochar from conilon coffee straw was important to increase the content of P and, mainly, K in the aerial part of corn.

No abstract

The use of organic waste in agriculture has stimulated the search for technologies that reduce environmental pollution. Among the residues are the biochar and swine wastewater (SW), which incorrectly disposed cause negative impacts, however, when combined, they can enhance agricultural production, due to the synergism between both. In this sense, the objective was to evaluate the influence of doses of biochar, from conilon coffee straw, combined or not with swine wastewater diluted to 50% (SW50%), on the nutrient content in medium and clayey texture soils and in the corn plant tissue. The experiment was carried out in a greenhouse, with five doses of biochar, two irrigation waters and two soils, with three repetitions. The pH, P, K + , Ca +2 , Mg +2 , Zn +2 and Na + in the soil and N, P, K, Ca, Mg, Zn and Na in plant were evaluated. The addition of biochar in doses linearly increased the levels of P and K + in both soil textures, with synergy when irrigated with SW50%. The SW50% provided a nutrients increase in the corn plant tissue. The agricultural use of biochar from conilon coffee straw was important to increase the content of P and, mainly, K in the aerial part of corn.