Rabeeah S. Altarhouni
Mansour J. A
Amna A. M. Ghabag
Abushoufa A. A
Hassan E. A
Abstract :
In order to examine the influence of various seaweed extract rates (0.0, 2, 4 and 8 ml/l) under various farmyard manure rates (0.0, 20, 40 and 60 m3/ hectare) on of marjoram (Majorana Hortensis L.) plants, a field experiment was conducted during the 2023 and 2024 seasons. Farmyard manure rates were distributed in main plot while seaweed extract rates were arranged in sub plot. The influence of these treatments on plant growth traits, herb yield and volatile oil production of marjoram was determined. The results suggested a significant improve in all studied growth trait values (plant height and number of branches/plant) and herb yield (herb fresh and dry weights per plant and per hectare) as well as volatile oil production (percentage and yield per plant and per hectare of volatile oil) with increasing the rates of farmyard manure and seaweed extract at both cuts during both seasons. The maximum values of theses parameters were achieved with the treatment of seaweed extract at 8 ml/l combined with farmyard manure at the highest rate (60 m3/ hectare). the economic evaluation of this study, it was found that the highest net return and value of marjoram plants were obtained by applying 60 m3/ha of farmyard fertilizer with seaweed extract at a concentration of 8 ml/L, where the profit/cost ratio was recorded as 3.064 compared to other interaction treatments under study.