Desempenho e aplicabilidade do irrigâmetro para cultura da soja na região de Bossoroca, RS

Abstract

Irrigation has the function to adequately supply the water demands of crops so that they express their full productive potential. But there are variations with regard to the relationship soil, plant, atmosphere, infer that in order to determine differences in crop yields, so the use of technology and equipment is essential for good irrigation management. The objective was to evaluate the feasibility of implementing a system with center pivot irrigation in soybean (Glycine max (L.) merrill.) with the aid of irrigameter, and comparing its performance with the tank class A This study was conducted at Grange Boligom Bossoroca in the municipality of RS, in an experimental area of 31.17 ha in the period from january to june 2010. The collection of plants was carried out under control, within each sector, being collected twentyfive plants, always the same, to evaluate their vegetative growth and yield components. Parameters were measured for growth and development, such as leaf area index (LAI) and plant height in fortnightly periods. At harvest were determined yield components like number of plants.m², number of pod.plant-1, number of grain.vagens-1, average grain weignht, dry weight of grain.plant-1, dry weight of stem.plant-1, dry mass of pod.plant-1, total dry weight, harvest index and yield (kg.ha-1).The irrigation management was conducted with irrigation provided by the irrigameter. The irrigation water was applied equally in all sectors, being performed by controlling Irrigameter. Files with the points of the area were viewed through georeferenced ArcGIS version 9.3, which yield maps were generated by interpolation. Average production of different sectors were subjected to ANOVA and Tukey Test at 5% probability. It is concluded that there was a difference of irrigation between the irrigameter and tank class "A", showed variation in production across sectors, where the sector in 03 production the greatest quantity to 6713.25 kg ha-1 and the lower sector 05 with 5248.05 kg ha-1.