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.

O desempenho de três cultivares de alface (Lactuca sativa L.), sob cultivo protegido, foi avaliado de julho a outubro de 2004, no Instituto Agronômico, em Campinas (SP). O delineamento experimental foi o inteiramente ao acaso, com quatro repetições, sendo avaliadas as cultivares Bariri (tipo alongada), Mariane (tipo crespa) e Verdinha (tipo lisa). Avaliou-se aos 7, 14, 21 e 28 dias, a altura média das plantas e o número de folhas. Também aos 28 dias foram avaliadas a área foliar, o diâmetro, a biomassa fresca e a biomassa seca da cabeça. Houve aumento linear na altura média e no número de folhas das plantas em função do tempo. Aos 28 dias observou-se que a cultivar Bariri, sem diferir da Mariane foi superior à Verdinha quanto à altura média das plantas.Verificou-se ainda que a cultivar Bariri foi superior às outras duas para número de folhas e área foliar; na `Verdinha' observou-se maior diâmetro de cabeça e maior biomassa fresca de cabeça sem diferir de `Mariane' para essa última característica.

Performance of three lettuce (Lactuca sativa L.) cultivars in plastic-greenhouse was carried out in Campinas, São Paulo State, Brazil, from July to October 2004. The experiment was set up in completely randomized design with four replicates. Bariri (lengthy leaf lettuce), Mariane (crisp head lettuce) and Verdinha (leafy lettuce) cultivars were evaluated for yield, average plant height and number of leaves at 7, 14, 21 and 28 days after transplantation. Head diameter, foliar area and shoot fresh weight were also obtained at 28 days. The effect of sampling period showed linear response in function of time for average plant height and number of leaves. Number of leaves and foliar area were greater in `Bariri' but `Verdinha' showed greater head diameter. `Bariri', without differing from Mariane, showed greater average plant height than `Verdinha' at 28 days after transplantation. `Verdinha' showed greater head diameter and head fresh weight, without differing from `Mariane' as to this character.