Effect of Cutting Dates on Forage Yield of Three Vicia Varieties (Vicia Spp.) in Sulaimani Governorate.

Abstract

During the winter season of 2021-2022, a field experiment was conducted at Qlyasan locations in Sulaimani governorate. The aim of this research was to examine the consequence of cutting dates on the yield of forage and seeds, as well as on the components of various Vicia varieties. The experiment was designed as a factorial design and conducted using a randomized complete block design. The least significant difference (L.S.D.) test with a significance level of 5% was used for the statistical analysis. The three Vicia varieties tested were common vetch (Vicia sativa), narbon vetch (Vicia narbonensis), and bitter vetch (Vicia ervilia). Two cutting dates were used, namely, control (Co, no cut), cut 1 (80 days after sowing), and cut 2 (20 days after the first cut). The findings of this research demonstrated that the interaction between common vetch and cutting at 80 days after sowing produced the highest values of the dry matter percentage trait. Meanwhile, the interaction between narbon vetch and cutting 20 days following the initial cut produced the maximum fresh yield (ton/ha) and stem dry weight (g) values. The highest recorded values for the characteristics "pod count per plant" and "seed yield (kg/ha)" were obtained through the interaction between the control treatment and narbon vetch. However, the interaction between cutting at 80 days after sowing and narbon vetch produced the highest values of the 100-seed weight trait (gm). The variation in climatic conditions between seasons may explain these results.

Keywords

• common vetch
• narbon vetch
• bitter vetch
• seed yield
• cutting
• and forage yield