Due to the high consumption of rice cereal that feeds more than half of the world and the demand for new techniques that increase productivity, research is being done with nitrogen-fixing bacteria, which inoculated seed may reduce the cost of nitrogen fertilizer. Among the bacteria tested, Azospirillum brasilense showed greater efficiency and satisfactory results, making it a viable alternative to increase production. Thus the objective of the project is to study the efficiency of nitrogen fixation by bacteria Azospirillum brasilense in two rice cultivars fertilized with different doses of nitrogen. The experimental design is the randomized blocks arranged in a 2x4x2 factorial design. The treatments will consist of a combination of two rice cultivars (IAC 202 and Ana 5011), four doses of nitrogen in (0, 30, 60 and 90 kg / ha) and inoculation with Azospirillum brasilense (and without), with 4 repetitions. The study will be conducted in an experimental area of Teaching and Research Farm belonging to the Faculty of Engineering - UNESP - Ilha Solteira, located in the jungle - MS. During the development of the project will be conducted the following assessments: seedling emergence, flowering, leaf N content, plant height, degree of lodging, number of panicles per m2, number of grains per panicle, grain 100, hectoliter mass , grain yield and milling yield.
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