Nitrogenization and n fertilization effects on protein contents in wheat grain

Abstract

Nitrogen fertilization (0, 80, 120 and 150 kg N ha(-1)) and seed nitrogenisation (different strains Azotobacter chroococcum. Azospirillum lipoferum, Beijerinckia Derx and Klebsiella planticola) effects on protein contents in wheat grain were tested for three growing seasons (1999, 2000 and 2001)on Zemun Polje calcareous chernozem. Bacterisation statistically significantly affected the yield level and the protein content in the grain. Furthermore, the highest values of the observed parameters were determined in the fertilising variant with 80 kg N ha(-1), which is very important from the aspect of the system sustainability. If wheat, as a non-legume species, could accomplish a successful association with a compatible type and strain of nitrogen fixing bacteria, a possibility that wheat satisfies a part of its needs for nitrogen by nitrogen fixation could be achieved, and in such a case the application of N Fertilisers would be reduced.