Environmental Studies on Different Nitrogen Fertilizers on Growth Yield and Volatile Oil of Thyme Plant

Abstract

To investigate the effect of different types of nitrogen fertilization the growth and productivity of thyme within reducing the harm effects of the excess of nitrogen fertilizers as an environmental and healthy problems, two successive experiments were carried out in pots during 2016, 2017 season's at the experimental green house Faculty of Agriculture, Ain Shams University Cairo , Egypt. Three types of nitrogen fertilizers amonium nitrate, ammonium sulphate and Urea, with three concentrations (40%, 60%, 80%) were used. Data showed an increase in number of lateral branches, plant height and amino acids with 40 units of ammonium nitrate, while the best effect to reduce NO 3 , NO 2 as a lowest value was 40 units of ammonium sulphate. The highest value of herb fresh weight was recorded by 40 units of urea, (42:48 g / plant) while herb dry weight (18:54 g/ plant) by 40 units of ammonium sulphate, volatile oil (0.92 % v/ w) with 60 units of ammonium nitrate , amino acid (3.71 g / 100 g fw) with 80 units of urea.

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

“…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).…”