STUDY OF TESTS FOR EVALUATING PHYSIOLOGICAL QUALITY OF PEANUT SEEDS

JOÃO NAKAGAWA, APARECIDA MARQUES DE ALMEIDA, MARIA JOSÉ DE MARCHI; E CIRO ANTONIO ROSOLEM

 

The purpose of the present research was to study the tests and parameters that have been utilized under brazilian conditions for evaluating physiological quality of peanut (Arachis hypogaea sub-especie fastigiata var. fastigiata). Two experiments were carried out, under laboratory and under field conditions, employing 28 samples of seeds harvested during dry season and 14 samples of seeds harvested during wet season. Seed quality was evaluated through: the percentage of germination, the percentage of normal seedlings at first count, the percentage of total alive seedlings (sum of normal and abnormal seedlings), the weight of dry matter of shoot axis (hypocotyl + epicotyl) and the weight of dry matter of embryo axis (radicle + hypocotyl + epicotyl), under laboratory conditions; the percentage of seedling emergence at the 8th day, the percentage of total seedling emergence, the speed of emergence of seedling, the index of speed of emergence and the weight of dry matter of plants at the 20th day after sowing, under field conditions. The percentage of normal seedlings at first count, the percentage of germination, the percentage of seedling emergence at the 8th day, the percentage of total seedling emergence and the index of speed of emergence were better than the others tests. All these tests presented positive and significative correlations among them.



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