RESUMO Objetivou-se, com este trabalho, determinar o tamanho de amostra para análise de caracteres físicos e químicos de frutos maduros de maracujá-fedorento (Passiflora foetida). Foram colhidos, aleatoriamente, 150 frutos de plantas cultivadas em casa de vegetação. Em laboratório, esses frutos foram mensurados quanto a 12 caracteres (comprimento longitudinal; diâmetro equatorial; massa de fruto; massa de casca; massa de polpa; rendimento de polpa; peso de sementes por fruto; número de sementes por fruto; massa de sementes por fruto; acidez titulável; sólidos solúveis e ratio), sendo calculadas as medidas de tendência central e de dispersão e verificada sua normalidade. Determinou-se o intervalo de confiança bootstrap percentil, a partir da simulação de tamanho 4.000, para 150 tamanhos de amostra (1, 2, ..., 150 frutos) de cada caractere mensurado. Os caracteres físicos e químicos analisados em frutos maduros de P. foetida apresentam diferentes precisões experimentais e requerem diferentes tamanhos de amostra. Para o comprimento longitudinal, por exemplo, o diâmetro equatorial e a relação entre estes, seis frutos são suficientes para a estimação da média com um erro de estimação de 5% da média. Se forem considerados todos os caracteres físicos e químicos de frutos maduros, analisados neste trabalho, são necessários no mínimo 39 frutos, assumindo-se erro de 10% da estimativa da média.
Commercial substrates and their fertilization are essential for the morphophysiological, nutritional, and sanitary quality of seedlings. In this perspective, this study aimed to evaluate the quality of clonal seedlings of the black pepper cultivar Bragantina under doses of controlled-release fertilizers (CLF) in a commercial substrate. The treatments were constituted by five doses of the CLF Osmocote® 19-06-10 Mini Prill (3-4 months) (0, 2, 4, 6, and 8 kg m-3), with four replications of 16 cuttings. The CLF Osmocote®, especially in doses close to 4.16 kg m-3, showed to be promising for the production of clonal seedlings of the black pepper cultivar Bragantina.
In Brazil 95% of the passion fruit marketed comes from the species Passiflora edulis f. flavicarpa (yellow passion fruit), the remainder are Passiflora edulis f. edulis (purple passion fruit) and Passiflora alata (sweet passion fruit), considered market niches. Because of the wide genetic variability the genus Passiflora, it is of fundamental importance to identify superior genotypes to improve the quality of fruit for the fresh market. The objective is to analyze the physical and chemical characteristics of the fruits of 33 genotypes P. alata Curtis, evaluated in a randomized complete block design with two replicates of four plants, from native matrices, located at the experimental farm of the University Center of the North of Espírito Santo, Federal University of Espírito Santo, in the Northern Region of the state of Espírito Santo, São Mateus -ES. Thirty-two mature fruits were collected in each replicate, eight per plant and the following characteristics were analyzed: fruit weight (g); equatorial and polar diameter of fruit (cm); peel thickness (mm); mass of the pulp (g); pulp volume (mL); pulp yield (%); number of seeds per fruit, pH; soluble solids (SS); titratable acidity (TA) and ratio (SS/TA). There is a wide genetic variability among P. alata genotypes as to the traits assessed. Genotypes 4, 6, 8, 11, 15, 18, 21, 25 and 26 stood out among the rest, and is therefore recommended for new plantings and future breeding programs.
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