crescimento de mudas de jacaré (piptadenia gonoacantha j.f. macbr.) em diferentes tipos de solos e fontes e doses de nitrogênio jacaré (piptadenia gonoacantha j.f. macbr.) seedling growth in different soil types and nitrogen sources and doses

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ID: 157142
2009
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Abstract
Este trabalho foi realizado com o objetivo de avaliar o crescimento e qualidade de mudas de Piptadenia gonoacantha (jacaré) em resposta a fontes e doses de nitrogênio produzidas em amostras de três diferentes tipos de solo. O delineamento estatístico adotado foi em blocos casualizados (DBC), analisados em esquema fatorial (3 x 5 x 3), correspondendo a três fontes (nitrato de amônio, nitrato de cálcio e sulfato de amônio) e cinco doses de nitrogênio (0, 50, 100, 150 e 200 mg/dm³ de N, aplicadas como solução em quatro porções iguais aos 25, 50, 75 e 100 dias após a semeadura) e três tipos de solos (latossolo, argissolo e cambissolo), com quatro repetições. Foram analisados os parâmetros morfológicos, o índice de qualidade de Dickson e a nodulação do sistema radicular ativa e total e suas relações. Os substratos argissolo e cambissolo e a aplicação do sulfato de amônio proporcionaram maiores médias com relação às características morfológicas avaliadas. Quanto às doses de N utilizadas neste estudo, as melhores médias dos parâmetros morfológicos foram adquiridas com a aplicação variando de 151 a 200 mg/dm³ de N.
The objective of the present work was to evaluate the growth and the quality of seedlings of Piptadenia gonoacantha in response to nitrogen sources and doses produced in samplings of three different types of soil. The experiment was arranged in a randomized design (DBC), in a factorial scheme (3x5x3), corresponding to three sources (ammonium nitrate, calcium nitrate and ammonium sulphate), and five doses of nitrogen (0, 50, 100, 150 and 200 mg/dm³ N), applied in a solution in four equal parts 25, 50, 75 and 100 days after seed saving), and three types of soil (Latisol, Argisol and Cambisol) with four repetitions. The morphologic parameters, Dickson quality index, root system nodulation, both active and total and their relations were analyzed. The substrates Argisol and Cambisol and ammonium sulphate provided greater means for the morphologic characteristics evaluated. In relation to the N doses evaluated in this study, the better means for the morphologic parameters were achieved with the doses varying from 151 to 200 mg/dm³N.
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Authors Lissandra Silva Marques, Haroldo Nogueira de Paiva, Júlio César Lima Neves, José Mauro Gomes, Paulo Henrique de Souza
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Journal journal of veterinary medical research
Year 2009
DOI
10.1590/S0100-67622009000100009
URL
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-67622009000100009
Keywords
nitrogen

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