Resumen: El objetivo de este estudio fue evaluar el crecimiento y acumulación de macro y micronutrientes en la planta del melón híbrido Ibérico (Syngenta Seeds). El experimento fue realizado entre enero y abril de 2013 en la hacienda experimental «Rafael Ferdandes» de la Universidade Federal Rural do Semi-Árido, ubicada en Mossoro, Río Grande do Norte, Brasil. El diseño experimental utilizado fue el de bloques al azar con once tratamientos y cuatro repeticiones. Los tratamentos consistieron en colectas a los 0, 7, 14, 21, 28, 35, 42, 49, 56, 63 y 70 días después del transplante. El estudio cuantificó las acumulaciones de materia seca, nitrógeno (N), fósforo (P), potássio (K), cálcio (Ca), magnésio (Mg), zinc (Zn), hierro (Fe), manganeso (Mn) y cobre (Cu) en la parte vegetativa (hojas y tallos), frutas y planta entera. Al final del ciclo los frutos acumularon mayor cantidad de materia seca, correspondiendo al 73,7 % del total. El N, P, K, Fe, Mn, Zn y Cu se acumularon preferencialmente en los frutos, mientras el Ca y Mg lo hicieron en la parte vegetativa. La mayor acumulación de masa seca y nutrientes ocurrió entre 35 y 49 días después del trasplante, con la excepción de calcio, magnesio, cobre y zinc que extendieron su acumulación hasta el final del ciclo. El orden decreciente de acumulación de nutrientes para el melón híbrido ibérico fue: N> K> Ca> P> Mg> Fe> Zn> Mn> Cu.

Summary: The objective of this work was to evaluate the growth and accumulation of plant nutrients in Ibérico hybrid melon (Syngenta Seeds). The experiment was carried out at the «Rafael Ferdandes» experimental farm of the Universidade Federal Rural Semi-Arido in Mossoró, Rio Grande do Norte, Brazil, from January to April 2013. We used a randomized block design with eleven treatments and four replications. The treatments consisted of the sampling periods: 0, 7, 14, 21, 28, 35, 42, 49, 56, 63 and 70 days after transplanting. This study assessed dry matter, nitrogen (N), phosphorus (P), potassium (K), calcium (Ca), magnesium (Mg), zinc (Zn), iron (Fe), manganese (Mn) and copper (Cu), the vegetative part (leaves and stems), fruits, and whole plant. The fruits were the preferred drain of the plant, corresponding to 73.7 % of the dry matter accumulated. The N, P, K, Fe, Mn, Zn and Cu were accumulated preferentially in fruits, while Ca, and Mg accumulated in the vegetative part. The highest accumulation of dry mass and nutrients occurred from 35 to 49 days after transplanting, with the exception of calcium, magnesium, copper and zinc that extended their accumulation until the end of the cycle. The decreasing order of nutrient accumulation for the Ibérico hybrid melon was: N > K > Ca > P > Mg > Fe > Zn > Mn > Cu.

No município de Itatiba-SP, no período de março a julho de 2007, foi realizado um experimento com o objetivo de avaliar doses de nitrogênio e potássio e espaçamentos entre plantas na produtividade e classificação de brócolos para indústria. O experimento foi instalado sob delineamento de blocos ao acaso, com os tratamentos em esquema fatorial 5 x 4, e três repetições, sendo avaliadas as doses de nitrogênio-potássio: 105-105; 157,5-157,5; 210-210; 262,5-262,5 e 315-315 kg ha-1 de N e K2O e os espaçamentos entre plantas: 0,2; 0,3; 0,4 e 0,5 m. O espaçamento entre linhas foi de 0,8 m. Foram avaliados o teor foliar de nitrogênio (TN) e de potássio (TP), produtividade de inflorescência (PI), produtividade de floretes (PF), rendimento industrial (RI) e classificação dos floretes com base em seu comprimento: PF5 (<5 cm); PF57 (>5 e <7 cm); PF79 (>7 e <9 cm) e PF9 (>9 cm). Maiores espaçamentos entre plantas proporcionaram maior TN e menores PI e PF. As doses NK e os espaçamentos entre plantas não influenciaram significativamente o TP e o RI. As maiores produtividades de inflorescências (22,08 t ha-1) e de floretes (17,09 t ha-1) foram obtidas com 0,20 m entre plantas e 315 kg ha-1 de N e de K2O. Maior percentagem de floretes na classe PF5 foi obtida no menor espaçamento entre plantas. As doses NK e os espaçamentos entre plantas não influenciaram as percentagens de floretes nas classes PF79 e PF9.

In Itatiba, São Paulo state, Brazil, during the period between March and July of 2007, an experiment was carried out aiming to appraise the effect of doses of nitrogen and potassium (105-105, 157.5-157.5, 210-210, 262.5-262.5 and 315-315 kg ha-1 N and K2O) and spacing between plants (0.2, 0.3, 0.4 and 0.5 m) upon the yield of broccoli and their classification. The experimental design was carried out in a randomized block, with the treatments in a 5 x 4 factorial scheme and three replications. Rows of plants were 0.8 m apart. The following characteristics were evaluated: foliar content of nitrogen (N) and potassium (K), head yield (HY), florets yield (FY), industrial yield (IY) and classification of florets based on length: FY5 (<5 cm); FY57 (>5 and <7 cm); FY79 (>7 and <9 cm) and FY9 (>9 cm). The largest spacing between plants provided the highest N, but HY and FY were reduced. The NK dose and spacing between plants did not influence significantly the level of K and IY. The maximal HY (22.08 t ha-1) and FY (17.09 t ha-1) were obtained with 0.20 m between plants and 150% NK dose (315 kg ha-1 of N and K2O). The higher percentage of florets in FY5 was obtained with smaller spacing between plants and NK dose and spacing did not influence significantly the percentage of florets with lengths greater than 7 cm.