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Effect of different levels of water deficit on yield parameters of rapeseed crop

Published by the American Society of Agricultural and Biological Engineers, St. Joseph, Michigan

Citation:  Bioenergy Engineering, 11-14 October 2009, Bellevue, Washington  BIO-098000.(doi:10.13031/2013.28875)
Authors:   Carolina Bilibio, Oliver Hensel, Jacinto de Assuncao Carvalho, Uwe Richter, Minella Martins
Keywords:   water management, irrigation, water stress

Effects of different levels of water deficit applied during rapeseed crop development were assessed in a trial carried out in greenhouse at the Department of Agricultural Engineering of Kassel University, Germany, in randomized block design, with one cultivar (Ability Summer Rape) and three levels of water deficit (0, 30, 60% of evapotranspiration) totalizing three treatments with 20 repetitions. The following assessments were carried out on a weekly basis: stalk diameter; plant height; number of leaves; number of branches; flower length and number of pods. At the end of the experiment we assessed total green matter; total dry matter, grain yield; grain protein rate; and grain oil rate. Subsequently, data were submitted to analysis of variance, and the effect of treatments was assessed by regression analysis. Results showed significant differences among treatments for all variables, except for plant height and grain protein rate. Factor of response ky, which indicates crop sensitivity to water deficit, was lower than 1 for all variables assessed. Grain yield showed the highest sensitivity to water deficit.

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