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Optimising Water Use in Irrigated Canola Areas in Brazil
Published by the American Society of Agricultural and Biological Engineers, St. Joseph, Michigan www.asabe.orgCitation: Bioenergy Engineering, 11-14 October 2009, Bellevue, Washington BIO-098003.
Authors: Carolina Bilibio, Oliver Hensel, Jacinto de Assuncao Carvalho, Uwe Richter, Minella Martins
Keywords: irrigation, rapeseed, yield, water tension on soil, water depth
Irrigation management, which aims to determine time and amount of irrigation, was investigated in rapeseed crop in two trials, both carried out in a totally randomized experimental design. The first trial, experiment 1, comprised 4 treatments and 4 repetitions, totalising 16 experimental plots. Different water tensions were applied on soil: 20, 40, 80, and 120 kPa. The second trial, experiment 2, comprised 5 treatments and 4 repetitions with application of 5 different irrigation depths: 50; 75; 100; 125, and 150% of relocation depth up to field capacity. According to the variance analysis, experiment 1 showed that different water tensions on soil affected the number of branches, number of pods and yield. The greatest yield was obtained with irrigation at 20 kPa tension, by F test 5% probability. Experiment 2 showed no significant differences between treatments due to precipitations.