Plant nitrogen concentration as a grain yield indicator of winter wheat cultivars
2006
Stojković Slaviša | Deletić Nebojša | Đurić Vladan
Concentration and accumulation of plant nitrogen, and their effect on grain yield, were studied through a two-year trial using twenty Serbian winter wheat cultivars. The studied cultivars showed differences in nitrogen content of over ground plant parts in the stage of flowering, as well as in nitrogen content of mature plants grain and straw. Significantly lower nitrogen content was observed in over ground plant parts in flowering, and in mature plant grains, in the second year of investigation. The average nitrogen concentration of grain was from 1.45% in cultivar Nevesinjka, up to 1.78% in cultivar Milica. Straw nitrogen concentration of the all cultivars was similar in both studied years. Nitrogen utilization increased by lowering of its concentration in straw, which induced an improvement of grain technological quality. It was found that nitrogen accumulation varies depending of cultivar genetic properties and environmental conditions. The strong, positive correlation between grain yield and grain nitrogen content points to a possibility of simultaneous selection for increased grain yield and grain protein content. Parameters of plant nitrogen concentration in flowering and full maturity may be used as agronomic and selection criteria for wheat productivity and quality.
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