%0 Journal Article
%T Caracter¨ªsticas agron micas e o estado nutricional de cultivares de girassol irrigado Agronomic characteristics and nutritional status of irrigated sunflower cultivars
%A Leonardo A. de Aquino
%A Fred D. B. da Silva
%A Paulo G. Berger
%J Revista Brasileira de Engenharia Agr¨ªcola e Ambiental
%D 2013
%I Departamento de Engenharia Agr¨ªcola - UFCG
%X Objetivou-se, neste trabalho, avaliar o estado nutricional, caracteres agron micos e a produtividade de cultivares de girassol sob irriga  o. Os cultivares Embrapa 122 V-2000, H¨¦lio 250, H¨¦lio 251, H¨¦lio 253, H¨¦lio 358, H¨¦lio 360, IAC Iarama, Dow Agroscience M 734 e MG 02, foram semeados em blocos ao acaso, com quatro repeti  es. O n¨²mero de folhas por planta no florescimento foi maior nos h¨ªbridos H¨¦lio 250, H¨¦lio 251, H¨¦lio 253, H¨¦lio 358, H¨¦lio 360, Dow Agroscience M 734 e MG 02, em rela  o aos cultivares de poliniza  o aberta Embrapa 122 V-2000 e IAC Iarama. Os teores foliares de N, P, K, Ca, Mg e S foram 40,91; 3,51; 35,91; 33,91; 6,23 e 7,88 g kg-1, respectivamente. Os cultivares Embrapa 122 V-2000 e IAC-Iarama apresentaram teor de P na folha ¨ªndice menor que os demais cultivares. Os teores foliares de Zn, Cu, Fe e o Mn foram 75,15; 24,11; 98,39 e 348,10 mg kg-1, respectivamente. O teor m¨¦dio de B na folha ¨ªndice nos h¨ªbridos e nas variedades de poliniza  o aberta foi de 119,25 e 140,35 mg kg-1, respectivamente. Os cultivares H¨¦lio 250, H¨¦lio 251, H¨¦lio 253, H¨¦lio 358, H¨¦lio 360, Dow Agroscience M 734 e MG 02 apresentaram maior produtividade que o Embrapa 122 V-2000 e o IAC Iarama. This work aimed to assess nutritional status, agronomic characteristics, and productivity of sunflower cultivars under irrigation. Embrapa 122 V-2000, H¨¦lio 250, H¨¦lio 251, H¨¦lio 253, H¨¦lio 358, H¨¦lio 360, IAC Iarama, and Dow Agroscience M 734 and MG 02 cultivars were sown in randomized block design with four replications. The number of leaves per plant in full bloom was higher in hybrid H¨¦lio 250, H¨¦lio 251, H¨¦lio 253, H¨¦lio 358, H¨¦lio 360 and Dow Agroscience MG 734 and M 02 related to open-pollinated cultivars Embrapa 122 V-2000 and IAC Iarama. Foliar contents of N, P, K, Ca, Mg, and S were 40.91, 3.51, 35.91, 33.91, 6.23, and 7.88 g kg-1, respectively. Embrapa 122 V-2000 and IAC-Iarama cultivars showed an average content of P in the index leaf lower than the other cultivars. Foliar contents of Zn, Cu, Fe, and Mn were 75.15, 24.11, 98.39, and 348.10 mg kg-1, respectively. Mean content of B in index leaf of hybrid and open-pollinated varieties was 119.25 and 140.35 mg kg-1, respectively. H¨¦lio 250, H¨¦lio 251, H¨¦lio 253, H¨¦lio 358, H¨¦lio 360, and Dow Agroscience M 734 and MG 02 cultivars had higher productivity than Embrapa 122 V-2000 and IAC Iarama.
%K Helianthus annuus
%K nutrientes
%K h¨ªbrido
%K variedade
%K Helianthus annuus
%K nutrients
%K hybrid
%K variety
%U http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662013000500013