Nizar Harba(1), Nabil Habib(2) and Taimaa Saud*(3)
(1)- Department of Field Crops , Faculty of Agriculture, Tishreen University.
(2)- Department of Field Crops, Faculty of Agriculture, Damascuse University.
(3)- Taimaa Saud, Master student, Department of Field Crops, Faculty of Agriculture,
Tishreen University.
(*Corrsponding author: Taimaa Saud. E-Mail: taimaa.saud@gmail.com)
Received: 08/04/2020 Accepted: 09/08/2020
Abstract
This research was carried out during the growing season 2018-2019 at Droukiat village, north of Lattakia, to determine amounts of nitrogen and the optimal clipping date for two dual purpose Triticale lines (Tcl1, Tcl2), under the conditions of the coastal region and its reflection on both grain and biological yields. Clipping was done at two growing stages ( G26 and G30) according to Zadock’s scale. Three levels of nitrogen fertilizer (30, 60, 90 kg N/h) were applied according to the Split-split plot design with three replications, clipping dates, nitrogen fertilizer levels and the lines were represented as main plot, sub plot and sub-sub plot, respectively. The results of research showed that the values of all traits significantly increased when applying nitrogen fertilizer at the level of (60 kg/ha), with an average of (37.88 g) for the weight of 1000 grains, and a grain yield (7029 kg/ha) and a high harvest index value (53.32), the clipping date also had an effect on the yield, as its values increased at early clipping at GS26 with an average of (12421 kg/ha) for Biological yield and an average of (4504 kg/ha) for grain yield. The interaction between the nitrogen fertilizer at the level of (90 kg/ha) and the control without clipping significantly improved the height of plant (131.51 cm) and biological yield (23277 kg/ha), while the interaction between the nitrogen fertilizer at the level of (60 kg/ha) and the clipping date at GS26 significantly improved the grain yield (8083 kg/ha) and harvest index value (60.94).
Keyword: Triticale, dual purpose, clipping, nitrogen fertilizer, grain yield, biological yield.
Full paper in Arabic: PDF