Production, biometrics and physicochemical analysis of bell pepper fruits fertilized with biochar from different residues /Producao, biometria e analise fisico-quimica de frutos de pimentao adubado com biocarvao de diferentes residuos

Bell pepper, a crop of nutritional importance, stands out for its vitamin C content. Given the need for sustainable agricultural practices, the present study explored the use of biochars derived from regional waste as an alternative in bell pepper cultivation. In this context, the present study aimed to evaluate the effect of biochars from poultry litter, coconut fiber, and rice straw on the biometric and physicochemical characteristics of bell pepper fruits, on fruit production per plant and on fruit yield. The experiment was performed in the field in a randomized block design, in a 5 * 3 + 1 factorial scheme, referring to five doses of biochar (0, 3, 6, 9, and 12 t [ha.sup.-1]) and three types of biochar (coconut fiber, poultry litter, and rice straw) with four repetitions, plus an additional treatment (mineral fertilization). Biometric variables (fruit length and diameter, skin thickness, number of fruits, fruit mass) and physicochemical variables of the fruits (soluble solids, titratable acidity, pH, vitamin C, and ash content), production and yield of the fruits were evaluated. The production of bell pepper fruits was not influenced by biochars, but the doses of biochars influenced all variables analyzed with the exception of skin thickness. Vitamin C and soluble solids contents were higher in treatments with biochar and lower with mineral fertilizer. Biochar produced from rice straw had the greatest influence on fruit acidification. Key words: Capsicum annuum L., fertilization, post-harvest, poultry litter, coconut fiber, rice straw O pimentao, cultura de importancia nutricional, destaca-se por seu valor de vitamina C. Diante da necessidade de praticas agricolas sustentaveis, o estudo explorou o uso de biocarvoes derivados de residuos regionais como alternativa na cultura de pimentao. Nesse contexto, objetivou-se avaliar o efeito de biocarvoes provenientes de cama de frango, fibra de coco e palha de arroz, nas caracteristicas biometricas e fisico-quimicas de frutos de pimentao verde, na producao de frutos por planta e na produtividade. A pesquisa foi conduzida em campo no delineamento em blocos casualizados, em esquema fatorial 5 * 3 + 1, referentes a cinco doses de biocarvao (0, 3, 6, 9 e 12 t [ha.sup.-1]) e tres tipos de biocarvao (fibra de coco, cama de aviario e palha de arroz) com quatro repeticoes, mais um tratamento adicional (adubacao mineral). Foram avaliadas variaveis biometricas (comprimento e diametro dos frutos, espessura da casca, numer