Zainab A. Abdel Razzaq(1)*, Sundus A. Alabdulla(1) and Kareem H. Mohssen(1)
(1). College of Agriculture, University of Basrah, Basrah, Iraq.
(* Corresponding author: Zainab Razzaq, Email: zainab.ahmed@uobasrah.edu.iq)
Received:4/01/2023 Accepted:20/02/2023
Abstract:
A field experiment was carried out at the Al-Zubair region (20 km southwest of the center of Basra Governorate), during the winter season 2021-2022. to study the effect of planting dates and levels of nitrogen fertilizer on growth, yield, and quality of Indian mustard, There were three planting dates, 15th October, 1st November and 15th November and four nitrogen fertilizer levels (0, 80, 160 and 240 kg N/ ha ). The experiment was carried out using a Randomized Complete Block Design (R.C.B.D.) with three replicates, Planting dates significantly affected all characteristics, as the first date was superior in some growth characteristics, which was positively reflected in the yield and quality of seeds, as the highest average yield of individual plant and seed yield reached 47.19 gm/ plant and 4.93 tons/ ha. It also recorded the highest percentage of protein and oil reached to 21.59% and 39. 96% respectively. The fertilizer level of 240 kg N/ h was superior in recording the highest average number of days from planting up to 50% flowering, the individual plant yield and the seed yield reached 48.22 days, 38.11 gm, and 3.85 tons/ ha for the traits, respectively and the highest percentage of protein amounted to 21.83%, while the comparison treatment recorded the highest percentage of oil amounted to 39.02%. As for the effect of the interaction, the date October 15 with the fertilizer level of 240 kg N/ ha excelled in recording the highest average of plant yield and seed yield of 58.96 gm/ plant and 6.45 ton /ha, while the first date with the comparison treatment record the highest percentage of oil reached to 40.70%, The interaction had no significant effect on the percentage of protein.
Key words: Mustard, nitrogen, planting, seed yield, oil percentage
Full paper in Arabic: pdf