A field experiments were carried out at the Agriculture Research and Experiment Center of the Faculty of Agriculture, Moshtohor, Benha University, Qalyubia Governorate, Egypt during 2013/2014 and 2014/2015 seasons to study the effect of weed control treatments ( unweeded, one-hand hoeing, two-hand hoeing and chemical herbicide (Acetochlor) at a rate of 0.750 liter/feddan as pre-emergence, (one feddan = 0.42 ha), potassium fertilizer rates (0,36 and 72 kg K2O/fed) and irrigated after depletion of 40, 60 and 80 % from field capacity (FC) on weed control, yield and its components as well as root quality of sugar beet (Beta vulgaris L.) cv. Faraida. The obtained results indicated that applied of water at 40% FC produced the highest total fresh and dry weeds biomass, root, top, gross, white, loss sugar yields, whereas produced the lowest TSS, sucrose, white and loss sugar percentages in comparison to other treatments.
Hand-hoeing twice resulted in a sharp decrease in total fresh and dry weights of weeds at 75, 90 and 105 days after planting (DAP) and recorded the highest root yield and its components compared with the other treatments. Whereas quality parameters were less affected by using one or two-hand hoeing.
Increasing potassium fertilizer level from 0 to 72 kg K2O/fed. led to significant increases in all studied traits except Na and α-amino nitrogen contents were decreased gradually with increasing potassium up to high rate.
Irrigation after depletion of 40% FC x hand hoeing twice x 72 kg K2O /fed treatments recorded the highest values of yield and quality parameters. While Irrigation after depletion of 80% FC x two- hand hoeing x unfertilized with potassium. treatment surpassed to the other interactions under conditions studies, it was noticed in a sharp decrease in total fresh and dry weights of weeds in both seasons. |
