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Sementes de aroeira foram obtidas a partir de 30 arvores de polinizacao livre, localizadas na Estacao Ecologica do Instituto Florestal em Paulo de Faria - SP, em setembro de 1996. Foram instalados dois testes de progenies de aroeira (consorciado com mutambo e angico do campo – Exp 1 e homogeneo – Exp 2), em marco de 1997, na Fazenda de Ensino e Pesquisa da FEIS/UNESP, em Selviria - MS. O delineamento experimental utilizado foram os blocos casualizados, tanto no experimento consorciado como no homogeneo. Os caracteres nutricionais avaliados foram o conteudo de: N, P, K, Ca, Mg e S. As estimativas de parâmetros geneticos foram obtidas em nivel de media de parcelas. A herdabilidade, aos dois anos, variou de 0,05 (para o Mg) a 0,63 (para o N). Foi encontrada variabilidade genetica para o teor de nutrientes e a caracteristica mais indicada para um processo de selecao seria o conteudo de N. Nutrient aspects of genetic variation on progeny of Myracrodruon urundeuva Fr. All. under different condition of crop Abstract Aroeira seeds were obtained from 30 trees of open pollination, located in the Estacao Ecologica do Instituto Florestal in Paulo de Faria – SP, in September, 1996. Two tests of Aroeira progeny were conducted (mutambo and angico together – Exp 1 and homogeneous – Exp 2), in March, 1997, at experimental station of FEIS/UNESP, in Selviria – MS. A randomized completely block design, to both experiments was used. The nutrient content evaluated was: N, P, K, Ca, Mg, and S. The genetic estimates achieved to mean plot level and herdability on 2 year old trees was 0,05 to Mg and 0,63 to N. There was genetic variability to nutrient content and N was the better characteristic to selection process.

Aspectos nutricionais da variação genética em progênies de Myracrodruon urundeuva Fr. All. sob diferentes condições de cultivo