%0 Journal Article
%T Crescimento e fenologia de esp¨¦cies de Jatropha durante a esta  o chuvosa Growth and phenology of species of Jatropha during the rainy season
%A Messias F. de Queiroz
%A Pedro D. Fernandes
%A Jos¨¦ Dantas Neto
%A Nair H. C. Arriel
%J Revista Brasileira de Engenharia Agr¨ªcola e Ambiental
%D 2013
%I Departamento de Engenharia Agr¨ªcola - UFCG
%X Jatropha curcas L., Jatropha mollissima (Pohl) Baill e Jatropha gossypiifolia L. s o Euforbi¨¢ceas com potencial para produ  o de biodiesel e uso na ind¨²stria farmac¨ºutica e em cosm¨¦ticos. Objetivou-se, com este trabalho, avali¨¢-las em termos de crescimento e fenologia em pesquisa de campo. Adotou-se o delineamento experimental em blocos casualisados contendo na parcela 18 plantas e tendo ¨¢rea ¨²til de 15 m2. Nos estudos fenol¨®gicos das plantas foram consideradas as seguintes fases: estabelecimento/crescimento vegetativo, flora  o, frutifica  o e matura  o/colheita. As fases fenol¨®gicas das esp¨¦cies diferiram cronologicamente. Jatropha mollissima cresceu mais do que as outras esp¨¦cies em altura de plantas enquanto Jatropha curcas cresceu mais em diametro caulinar. As maiores taxas de crescimento relativo em altura de plantas ocorreram durante o crescimento vegetativo com os maiores valores sendo registrados em Jatropha mollissima enquanto as maiores taxas de crescimento relativo, tamb¨¦m no crescimento vegetativo, foram registradas em Jatropha curcas. As menores taxas de crescimento relativo em altura de plantas e diametro caulinar das esp¨¦cies estudadas coincidiram com as fases reprodutivas. Jatropha curcas L., Jatropha mollissima (Pohl) Baill and Jatropha gossypiifolia L. are Euphorbiaceae with potential for biodiesel production and use in pharmaceutical and cosmetic industries. The aim of this study was to evaluate these species in terms of growth and phenology in a field experiment. In this study an experimental design of randomized blocks was adopted. The experimental plot had 18 plants and a useful plot area of 15 m2. In the phenological studies of plants the following phases were considered: establishment/vegetative growth, flowering, fruiting and ripening/harvest. The phenological stages of the species differed chronologically. Jatropha mollissima outgrew the others in plant height, while Jatropha curcas outgrew the others in stem diameter. The highest relative growth rates in plant height occurred during vegetative growth, with the highest values being recorded in Jatropha mollissima, while the greatest relative growth rates also in vegetative growth were recorded in Jatropha curcas. The lowest relative growth rates in plant height and stem diameter of the studied species coincided with the reproductive phases.
%K Euforbi¨¢cea
%K oleaginosas
%K ciclo fenol¨®gico
%K altura de planta
%K diametro de caule
%K Euphorbiaceae
%K oil seeds
%K phenological cycle
%K plant height
%K stem diameter
%U http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662013000400008