Title:	Crescimento inicial e desenvolvimento de três cultivares de mamoneira sob diferentes níveis salinos da água de irrigação.
Authors:	ALVES, A. N. SILVA, S. M. S. e GHEYI, H. R. BELTRÃO, N. E. de M. SEVERINO, L. S. SOARES, F. A. L.
Affiliation:	ALLAN NUNES ALVES, UFCG; SERVULO MERCIER SIQUEIRA E SILVA, UFCG; HANS RAJ GHEYI, UFCG; NAPOLEÃO ESBERARD DE MACÊDO BELTRÃO, CNPA; LIV SOARES SEVERINO, CNPA; FREDERICO ANTÔNIO LOUREIRO SOARES, UFCG.
Date Issued:	2008
Citation:	In: CONGRESSO NACIONAL DE IRRIGAÇÃO E DRENAGEM, 18., 2008, São Mateus. O equilíbrio do fluxo hídrico para um agricultura irrigada sustentável: anais. São Mateus: ABID, 2008. 5 p. 1 CD-ROM.
Description:	With the objective to study the effects of five levels of electrical conductivity of the irrigation water (ECw: 0.7; 2.7; 4.7; 6.7 and 8.7 dS m-1, at 25 oC), on the initial growth and development of three cultivars (Nordestina, Paraguaçu e CSRN-367) of castor bean (Ricinus communis L.), an experiment was conducted (5X3 factorial), in a randomized design with 3 repetitions. The appraised variables were plant height, number of leavEs and stem diameter, twenty, forty and sixty days after seeding (DAS). There was no interactive effect of the factors, except for plant height and number of leaves. The plant height decreased with the increase of salinity, the relative decrease at 20, 40 and 60 DAS being, respectively of 8.68, 9.70 and 9.77% for unitary increment of Ecw. The number of leaves showed significant effect for the levels of ECw and the stem diameter decreased linearly with the increment of ECw above 0.7 dS m-1, the decrease being 7.63 and 7.91% for unitary increment of electrical conductivity of the irrigation water, 40 and 60 DAS, respectively.
Thesagro:	Mamona Água Salobra Água de Irrigação Óleo Vegetal
NAL Thesaurus:	Salinity Castor beans Irrigation
Keywords:	Oil plant
Type of Material:	Artigo em anais e proceedings
Access:	openAccess
Appears in Collections:	Artigo em anais de congresso (CNPA)