Objetivou-se, com o trabalho, caracterizar as propriedades químicas e as composições dos substratos formulados à base de lodo de esgoto em diferentes combinações com resíduos orgânicos e vermiculita, a fim de se obter um meio de crescimento adequado para o crescimento de mudas florestais. Foi realizada análise de teores totais e disponíveis dos nutrientes dos 26 substratos formulados a partir da mistura de lodo de esgoto com vermiculita e os resíduos fibra de coco, palha de café in natura, composto orgânico, casca de arroz carbonizada e casca de arroz in natura, nas proporções de 100:0, 80:20, 60:40, 40:60 e 20:80 (lodo de esgoto:materiais) e uma testemunha, constituída por substrato comercial. O substrato comercial proporcionou as maiores médias para os teores disponíveis de fósforo, cálcio e magnésio. O lodo de esgoto proporcionou aumento da fertilidade dos substratos com aumento de teores de nutrientes, sobretudo fósforo, nitrogênio e cálcio. Os substratos formulados com lodo de esgoto e composto orgânico, independente de suas proporções, foram considerados os mais adequados para a produção de mudas de espécies florestais.
The use of organic wastes as primary source of nutrients can contribute to reducing the dependence on inputs, besides being a sustainable destination for these materials. This study aimed to evaluate the quality of Aegiphila sellowiana seedlings grown in substrates composed of different proportions of sewage sludge, organic wastes and vermiculite. Twenty six substrates (treatments) were tested, formulated from the mixture of sewage sludge with vermiculite and the wastes coconut fiber, fresh coffee straw, organic compost (fresh bovine manure and fresh coffee straw), carbonized rice husk and fresh rice husk, at the proportions of 100:0, 80:20, 60:40, 40:60 and 20:80 (sewage sludge:materials), and a control, composed of commercial substrate (Bioplant®). At 120 days after sowing, the following morphological characteristics were determined: collar diameter, shoot height, dry matter (shoots, roots and total) and Dickson quality index (DQI) of all plants. Substrates formulated with sewage sludge and organic compost led to higher growth of seedlings (40% SS:60% OC and 20% SS:80% OC). Proportions of 20 to 40% sewage sludge and 60 to 80% organic compost are recommended for the production of A. sellowiana seedlings.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.