Use of saline water and nitrogen in cultivation of castor bean brs –energy
2012
Alves, Allan N. | Gheyi, Hans R. | Uyeda, Claudio A. | Soares, Frederico A. L. | Nobre, Reginaldo G. | Cardoso, José A. F.
The potentiality of castor bean as a fuel crop, has created a real prospect for the expansion of its cultivation on a commercial scale, especially in the semiarid northeast Brazil. Therefore, the aim of this study was to evaluate the initial growth of castor bean cultivar BRS Energy in the initial phase - up to 40 days after planting irrigated with waters of different salinities and nitrogen fertilization. The experiment was conducted under conditions of greenhouse of the Department of Agricultural Engineering of the CTRN / UFCG, Campina Grande - PB. A randomized block design was used, with treatments consisting of different levels of electrical conductivity of irrigation water (0.6, 1.6, 2.6, 3.6 and 4.6 dS m-1 ) associated with different doses of nitrogen (50, 75, 100, 125 and 150% of the recommended dose for the pot experiments) in 5 x 5 factorial arrangement with three replications. The variables analysed were: index of velocity of emergence, percentage of emergence, plant height, number of leaves, leaf area and diameter at 40 days after sowing (DAS) and absolute growth rate of plant height, between 20 and 40 DAS. The results obtained permit to conclude that increase in water salinity negatively influenced all studied variables, and that the nitrogen did not influence these variables, except index of velocity of emergence and percentage of germination, where a significant interaction between salinity and nitrogen fertilization.was observed.
Show more [+] Less [-]AGROVOC Keywords
Bibliographic information
This bibliographic record has been provided by Instituto de Pesquisa e Inovação na Agricultura Irrigada