A acidez do solo é fator limitante na agricultura, pelo fato da mesma indisponibilizar o fósforo na solução do solo e influenciar na dinâmica dos demais nutrientes no solo. A utilização de silicato de cálcio (Ca) e magnésio (Mg) fornece silício (Si) e corrige a acidez do solo aumentando a produtividade. O objetivo do estudo foi observar a produção do quiabeiro e as características químicas do solo em função da aplicação de diferentes doses de silicato de cálcio e magnésio. Utilizou-se o delineamento em blocos casualizados com cinco tratamentos e cinco repetições cultivado em 2014 e 2016. O silicato de cálcio e magnésio foi aplicado ao solo nas seguintes doses: 0; 0,5; 1,0; 2,0 e 4,0 t ha-1. Foram avaliados o peso de fruto por planta, peso médio de frutos, número de frutos por planta, produtividade, e os teores de Si, Ca, Mg e pH do solo. Não há acréscimos nos componentes do rendimento e produtividade do quiabeiro com o fornecimento de silicato de cálcio e magnésio em solo com boa fertilidade. O silicato de cálcio e magnésio reduz a acidez do solo e aumenta os teores de Ca, Mg e Si disponíveis no solo.
Brazil is the world's largest producer of sugarcane, the main raw material used for the production of alcohol and sugar. The crop to achieve good levels of productivity demands high amounts of nutrients, which are usually supplied by the use of mineral fertilizers. An alternative for efficient fertilization is through the use of organomineral fertilizers. Such fertilizers consist of the mixture of organic fertilizers of animal or vegetable origin, and mineral fertilizers that undergo industrial processing. The industrial advance associated with the population increase has generated a large amount of solid waste and wastewater. One way to reduce the effects of environmental pollution from the presence of these solid wastes is through their treatment, giving rise to a pasty material, known as sewage sludge. Sewage sludge presents the potential to be used in the mineral nutrition of plants, both as fertilizer and as a soil conditioner. Biostimulants are natural or synthetic substances that can be applied directly to plants to increase yield and quality of crops of economic interest. Thus, the present review aims to report the study on the use of organomineral fertilizers from sewage sludge and biostimulant in sugarcane cultivation.
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