RESUMO
Boring bivalves of the family Pholadidae Lamarck, 1809 living in Argentinean and Uruguayan waters are herein revised. The literature research revealed twelve nominal species of Pholadidae mentioned as living in the study area. Type material of all nominal taxa were examined when it was possible. Additional specimens from field works and malacological collections were studied, illustrated and re-described. Details of type localities, repositories, and distribution range are provided for each valid taxa. This work revealed the presence of five native and one introduced species belonging to Pholadidae in Argentinean and Uruguayan waters. Barnea (Anchomasa) lamellosa, Cyrtopleura (Scobinopholas) lanceolata, Pholas (Thovana) campechiensis and Martesia fragilis belonging to the Argentine biogeographical province; Netastoma darwinii from Magellan province; and Barnea (Anchomasa) truncata introduced in the Bahía Blanca estuary. Finally, morphological comparison with congeneric species distributed in American seas are provided.
RESUMO
This research was conducted with the aim of evaluating the nutritional behavior and vegetative growth of two olive tree varieties with the reduction of chemical fertilization and the application of organomineral fertilizer. Three-year-old trees of varieties 'Barnea' and 'Grappolo 541' were used and cultivated on Quartzarenic Neosol in the field. The split-plot scheme was used, with a 4 x 2 factorial design, with the factors of four fertilizations and two varieties and the subplot of evaluation years. The four fertilizations consisted of 100%, 75%, 50% and 0% of the chemical fertilizer recommended for olive trees. Treatments were arranged in a randomized complete block design, with three blocks and three plants per plot. The organomineral fertilizer was used on all of the plants. Leaf samples and vegetative growth were evaluated in July 2012 and June 2013. The nutritional behavior of olive tree varieties 'Barnea' and 'Grappolo 541' was unchanged with a 50% reduction of chemical fertilizer and the application of organomineral fertilizer. The variety 'Barnea', with habit of rapid growth, had lower foliar nutrient concentrations. A 64.5% reduction of the chemical fertilizer with the application of the organomineral fertilizer had no effect on the vegetative growth of the olive tree variety 'Grappolo 541'.
A pesquisa foi realizada com o objetivo de avaliar o comportamento nutricional e o crescimento vegetativo de duas variedades de oliveira, com a redução da adubação química, pela aplicação do fertilizante organomineral. Foram utilizadas duas variedades de oliveira, 'Barnea' e 'Grappolo 541', de três anos de idade, implantadas no campo, em solo classificado como Neossolo Quartzarênico. Utilizou-se o esquema de parcela subdividida, na parcela o fatorial 4 x 2, sendo quatro adubações e duas variedades e, na subparcela, os anos de avaliação. As adubações constituíram-se 100%, 75%, 50% e 0% da adubação química recomendada para a oliveira, distribuídas em blocos casualizados, com três blocos e três plantas por parcela. Em todas as plantas foi feita a aplicação do fertilizante organomineral. As amostras foliares e a avaliação do crescimento vegetativo foram realizadas em julho de 2012 e julho de 2013. O comportamento nutricional das variedades de oliveira 'Barnea' e 'Grappolo 541' não foi alterado com a redução de 50% da adubação química e a aplicação de fertilizante organomineral. 'Barnea', com hábito de crescimento rápido, apresenta menores teores foliares de nutrientes. A redução da adubação química em 64,5%, com a aplicação de fertilizante organomineral, não interferiu no crescimento vegetativo da 'Grappolo 541'.
