The aim of this study was to assess the interdependency level between the fertilization system and wheat, Triticum aestivum ssp. vulgare, Ciprian cv, aboveground biomass production. The use of fertilizing substances or complexes has a major importance for crops, application being realized in a wide range of systems depending on the climatic and pedological conditions, but also on the economic status of the farm. Thus, the biomass production, but also other physiological, yield or quality indices can be predicted for different quantities of fertilizers. N is the most used fertilizer due to the fact that it has a high impact on crop development and quality, but also on grain production. N is commonly used alone because is it cheaper, but it is also the base for other complexes, like NPK. Nitrogen utilization efficiency is dependent on the N efficiency of biomass formation, remobilization of N from the senescent tissues, the N influence on carbohydrate partitioning and nitrate reduction efficiency. The field experiment was carried out in the Didactic Station of BUASVM Timișoara, Romania, where a slightly gleized cambic chernozem, specific for Banat region is found. The plants were fertilized with ammonium azotate in five variants (0, 50, 100, 150 and 200 kg active substance ha-1). This research was conducted on fresh and dried samples, representing aerial parts of wheat plants. The probes were sampled in May 2018. Biomass production was estimated using linear regression analysis. Only the aboveground parts of the wheat plant were studied, because the belowground biomass production on wheat is harder to estimate due to the morphology of the radicular system. Fresh and dry aboveground biomass increased proportionally with the amount of nitrogen used. The lowest fresh biomass was obtained for N 0 probes. The highest fresh biomass was obtained for N 200 samples. Regarding dry biomass production, similar tendencies were observed.

fresh biomass, wheat, nitrogen fertilization, dry biomass

field crops and pastures

Presentation: poster