STUDIES REGARDING THE INFLUENCE OF NITROGEN FERTILIZING DOSE ON SOME ECOPHYSIOLOGICAL PARAMETERS FOR TRITICUM AESTIVUM PUBLISHED

Adina-Daniela Datcu, F. Sala dana_datcu19@yahoo.com
This paper presents data obtained from a physiological study conducted in the spring of 2018 on Triticum aestivum spp vulgare, Ciprian cv. The species was cultivated on a slightly gleized cambic chernozem specific for Banat Area, also found in the Didactic Station of BUASVM Timișoara, Romania. Due to the large scale use and different doses and combinations of chemical fertilizers in the agricultural practice, we chose to fertilize the wheat with nitrogen in five experimental variants: 0, 50, 100, 150 and 200 kg active substance ha-1. Balancing the N rate, water use efficiency and yield are important problems in our country. Thus a proper use of fertilizers in general, and N in particular became a necessity. The plants were collected and transported in the laboratory where the leaves were separated using a scalpel. These were weighted, dried and incinerated. Some gravimetric parameters including leaves fresh weight, dry weight and ash content were determined. Next, organic and mineral content, but also OC / MC ratio were calculated. FW of the leaves increased proportionally with N dose. Leaf fresh weight is directly impacted by technological factors like N fertilizer rates. Consequently, regarding this parameter, significant differences between the five variants were observed, FW being significantly higher for N 200 probes when compared with other leaves from the plots fertilized with a lower amount of N. Same trend was observed for DW and AC, respectively. MC values varied between the N doses. From this point of view, the smallest mineral content in leaves was obtained for N 100 and N 150 variants, suggesting a possible remobilization of minerals in wheat plant with respect to N dose. Regarding OC, the maximum value was obtained for N 200. Despite the fact that OC and MC varied without a clear trend, OC / MC ratios had followed a clear polynomial increase together with the increase of N dose, varying between 4.9236 for N 0 and 10.2368 for N 200 variant. ANOVA revealed some significant differences. AC was the only parameter with homogenous data, FW, DW, OC, MC and OC/MC ratio being heterogeneous.
OC/MC ratio, mineral content, wheat leaves, N fertilization, organic content
Field crops and pastures
Presentation: poster

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