Possibility of Using some Beneficial Elements Stimulating Non-Biological N-Fixation Process As Partial Substitutes of Mineral Nitrogen under Poor Soils. إمکانية استخدام بعض العناصر المفيدة المحفزة لعملية التثبيت الغير حيوي للنيتروجين کبدائل جزئية للنيتروجين المعدني في الأراضي الفقيرة.

Abstract

Due to the environmental hazards of mineral N-fertilizers, finding an effective alternative to it is becoming necessary. So a field experiment was executed in sandy soil condition to evaluate the possibility of using titanium (Ti) and vanadium (V) as a substitute for mineral N-fertilizers. Faba bean was cultivated as an experimental plant based on its significant response to nitrogen fixation process either biological or nonbiological. Treatments were different levels of ammonium sulphate (20.5% N) which represented the main plots [100, 75 and 50% of nitrogen recommended dose (NRD) as starter, equivalent to 30, 22.5 and 15 kg N fed -1 , respectively] and different levels of Ti and V which represented the sub plots[ 5.0 and 10.0 mgL -1 for both separately in addition to control (plants without Ti and V)].The findings showed that plants treated with both Ti and V at both studied rates under ammonium sulphate fertilizer at rate of 75% of NRD realized plant performance at period of 65 days from sowing and at harvest stage better than that fertilized with ammonium sulphate at rate of 100% of NRD alone without both Ti and V and this may be due to their ability in nonbiological N-fixation process taking into consideration that rate of 5 mg L -1 for both studied elements was better than rate of 10 mg L -1 as well as it can be noticed that Ti was superior compared to V. Generally, it can be concluded that both Ti and V possess a vital role in non-biological N-fixation process.

Effect of sorbitol and boron on the growth and seed quality of faba bean (Vicia faba L.)

“…The cultivated area with faba bean in Egypt in the eighties, used to exceed 360,000 feddans and has been gradually decreasing to become only about 125,000 feddans in the 2020/2021 season (Sheha et al, 2022). Self-sufficiency in the past was achieved, and now the government import large quantities of the faba bean (Soliman and El Sherpiny, 2021). The Egyptian market demands no less than 450 thousand tons annually, while the production of the last season was about 190 thousand tons, and therefore there is a large gap between production and consumption of up to 60% that made the selfsufficiency rate little (does not exceed 40%) despite an increase in the average productivity, where the feddan is almost doubled, from 0.868 tons / feddan to 1.6 tons / feddan (Adam et al, 2022).…”