Effect of Vital Inoculations and Different Nitrogen Forms Fertilizer on the Quality and Productivity of Sunflower Plant under New Valley Conditions

Abstract

T HIS RESEARCH work was carried out at the new valley area, which is characterized by hot atmospheric conditions. In other words, plants cultivated at that area will definitely need help to overcome the adverse conditions prevailing in that experimental area. Fertilizer management is believed to be a good vehicle for providing sufficient nutrition to the grown plants. Encompassing combinations of mineral N fertilizer forms and free-living atmospheric N fixer organisms, fertilizer management is thought of to be a helpful tool to achieve remedial target anticipated from plants grown under the conditions of the experimental area. The combination treatment composed of applying ammonium sulfate (AS) at 60kg N/fed and inoculating with bio-fertilizer mixture of Azotobacter chroococcum and Azospirillum lipoferum was found to be significantly the best fertilizer management regime for the study area based on the findings of the current work. This combination treatment could produce the highest seed and oil yields of sunflower plants when compared with other combination treatments in both seasons of study. Fertilizer management regime in the current work depicted experimenting with combinations of mineral N forms applied at two rates and combined with inoculation with Azotobacter chroococcum, Azospirillum lipoferum and their mixture. The objective of the current research work is mainly to figure out a fertilizer combination treatment to help sunflower plants overcome the harsh conditions prevailing in the study area.

Effect of different nitrogen forms and bio-treatments on the growth and seed yield of downy safflower (Carthamus lanatus)

“…Among the tested nitrogen forms ammo nium sulfate was superior in its effect than the other two nitrogen sources. Such results confirmed the reports of prior works (Wahba et al, 2014;Khalid and Shedeed, 2015;El Sayed, 2020;Hegab et al, 2021) who showed increase in total carbohydrates or N, P and K% in seeds as result of ammonium sulfate application.…”

“…The data in Table 4 and figure 1 also revealed that under the same rate of bio treatment (T. viride, ver micompost or Amf) treating the plants with different nitrogen forms resulted in significant increase in veg etative growth parameters compared to control and among the tested nitrogen forms, with the applica tion of ammonium sulfate leading to superior growth compared with ammonium nitrate or urea. The increases in vegetative growth parameters due to ammonium sulfate treatments are in agreement with the findings of several studies on different plants including Cynara cardunculus (Sarhan et al, 2014), Urtica pilulifera (Wahba et al, 2014), Nigella sativa (Khalid and Shedeed, 2015), Sunflower (El Mantawy, 2017;El Sayed, 2020), Thymus vulgaris (Basal et al, 2019) and Jojoba (Hegab et al, 2021).…”

“…Ammonium sulfate (AS), ammonium nitrate (AN) and urea are the main forms of inorganic N fertilizers and are extensively utilized in modern agriculture. AS application was better than AN and urea for increasing vegetative growth yield parameters, chlorophyll content, NPK % in seeds and seed oil % of sunflower and jojoba (El Mantawy, 2017;El Sayed, 2020;Hegab et al, 2021).…”