O pequi é considerado espécie de grande interesse econômico, com grande potencial de expansão na culinária brasileira. Portanto, objetivou-se avaliar o efeito da radiação UV-C na qualidade e longevidade pós-colheita dos caroços de pequi in natura. O experimento foi conduzido em delineamento inteiramente casualizado, em esquema fatorial 4x4, análises destrutivas, e 4x6, análises não destrutivas, (tempo de radiação x dias), 4 repetições e 5 caroços por embalagem de cloreto de polivinila + poliestireno expandido. Os tratamentos foram expostos à radiação UV-C, com amplitude de onda medindo 254ƞm, sendo: 0 (controle), 2, 4 e 8 minutos, mantidos a 10±1°C e umidade relativa de 85±5%, sendo realizadas análises não destrutivas, como: perda de massa e conservação pós-colheita, por um período de 15 e 18 dias. As análises destrutivas como: Cor: L*, croma e °hue, acidez titulável (AT), sólidos solúveis (SS), índice de maturação (SS/AT) e pH, avaliadas por 9 dias. Os dados obtidos foram submetidos à análise de variância (p≤0,05) e regressão, quando significativos. A exposição à radiação UV-C por 4 e 8 minutos manteve a qualidade do pequi por até 18 dias, tornando-se menos susceptível a deterioração e escurecimento, além de apresentar uma tonalidade de cor mais atrativa, e menos ácida.Palavras-chave: Caryocar brasiliense Camb., vida de prateleira, conservação, cerrado. EFFECT OF ULTRAVIOLET RADIATION ON QUALITY AND POSTHARVEST STORAGE OF PEQUI ABSTRACT: The pequi is considered species of great economic interest, with great potential for expansion in brazilian cuisine. Therefore, the objective of evaluating the effect of UV-C radiation on quality and postharvest longevity of seeds of pequi in natura. The experiment was conducted in a completely randomized design in factorial scheme 4x4, destructive analyses, and 4x6, non-destructive analyses (time of radiation x days), 4 reps and 5 seeds per pack of polyvinyl chloride + polystyrene expanded. The treatments were exposed to UV-C radiation with wave amplitude measuring 254ƞm: 0 (control), 2, 4 and 8 minutes, kept at 10 ± 1°C and relative humidity of 85 ± 5%, being carried out, as non-destructive analyses: loss of mass and postharvest conservation, by a period of 15 and 18 days. The destructive analysis as: color: L*, chroma and °hue, titratable acidity (TA), soluble solids (SS), maturation index (SS/TA) and pH, evaluated for 9 days. Data were subjected to analysis of variance (p≤0.05) and when significant regression. The UV-C radiation exposure for 4 and 8 minutes kept the quality of pequi for up to 18 days, becoming less susceptible to deterioration and dimming, in addition to presenting a more attractive color tone, and less acidic.Keywords: Caryocar brasiliense Camb., shelf life, conservation, cerrado.

The objective of this work was to evaluate the nutrition and agronomic characteristics of common bean and castor bean under intercropping subject of nitrogen fertilization in top dressing. A randomized block design in a 2×2×4 + 4 factorial scheme was used, and there were three replicates. The treatments consisted of two common bean cultivars (Pontal and Pérola), which were intercropped with two castor bean cultivars (Energia and Paraguaçu), and combined with four nitrogen treatments (0, 50, 100 and 200 kg ha-1). Four additional treatments involved bean and castor bean cultivars at a single dosage of 40 kg ha-1 nitrogen. The nitrogen, potassium, calcium, magnesium and sulfur contents in castor bean intercropped with common bean leaves were influenced by nitrogen treatments. For common bean applied as top dressing, the maximum grain yields were 1,122 and 1,024 kg ha-1 for cultivars (cvs.) Pontal and Pérola, respectively, with a dose of 100 kg ha-1 nitrogen. Similar results were observed for castor bean, for whom 100 kg ha-1nitrogen provided the largest number of bunches and number of berries per bunch and the highest grain yield. The maximum values observed were 38 and 27 bunches per plant, 27.6 and 35.4 berries per bunch and 1,474 and 1,286 kg ha-1 grain yield for cvs. Paraguaçu and Energia, respectively.

This study aimed to verify the effect of the association between refrigeration and packaging on the preservation of postharvest quality of pitombas during storage. The fruits were harvested, transported to the laboratory, where they were selected, washed with neutral detergent and drinking water, and left to dry. Subsequently, the fruits packed in polypropylene (PP), low-density polyethylene (LDPE), polyethylene terephthalate (PET), polyvinyl chloride (PVC) + expanded polystyrene (EPS), and no packaging (Control). After this process, they were stored at temperatures of 6, 8, 10, 12, and 14±1 °C at 75±5% relative humidity (RH). The fruits were evaluated during 12 days for postharvest preservation, firmness, soluble solids content, pH, hue angle and chroma of the peel, with three replications of 10 fruits each, using a completely randomized design in a 5 × 5 × 7 factorial scheme (5 temperatures × 5 packages × 7 days of analysis). The results were subjected to analysis of variance (P≤0.05) and, when significant, the means were compared using the Scott-Knott test and regression at a 5% significance level. The use of LDPE packaging associated with refrigeration at 6 °C can be used to store pitombas for 12 days, as these conditions preserved the evaluated parameters, guaranteeing fruit quality.

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