The Effect of Harvesting Stages and Locations on Seed Yield and its Components of Some Narbon Vetch (Vicia narbonensis) Lines under Rainfed Condition of Sulaimani Governorate- Iraq
This study was carried out at two locations of sulaimani region were Qlyasan and Kanipanka during the winter season of 2017-2018 to determine the effect of harvesting stages and locations on seed yield and its components of some narbon vetch lines under rainfed condition, experimental design was split plot with CRBD arrangement in three replications, six lines of narbon vetch (ICARDA2392, ICARDA2384, ICARDA2383, ICARDA2561, ICARDA2380, ICARDA2816) butting in main plots, and subplots consists of different harvesting stages were (Control, beginning of flowering, 50% flowering and full flowering). The mean of treatments where compare using the least significant differences (LSD) test at 0.05 significant level. As the average both locations, the results revealed that the differences among the narbon vetch lines were highly significant in most yield traits such as biological yield, pod yield and seed yield but not significant on other traits straw yield and harvest index, maximum values for most seed yield traits exhibited by line 4 and 5. Harvesting stages effect on all yield traits of narbon vetch was highly significant, control treatment (without harvesting ) recorded the best value due to all traits biological yield, pod yield, seed yield, straw yield and harvest index. The interaction effect between the lines and harvesting stages were highly significant on all yield traits of narbon vetch except harvest index which was not significant, the highest biological yield, pod yield and straw yield produced by the interaction between L2 with control treatment, but the highest seed yield was obtained by association between L5 and control treatment. The effect of locations on all yield in bred lines was highly significant. Kanipanka location predominated Qlyasan location and gave maximum values of biological yield, pod yield, seed yield and straw yield. But, maximum value of harvest index recorded in Qlyasan location. Regarding yield components of narbon vetch, the results of the averages of both location confirmed that the differences among narbon vetch lines were highly significant for both traits no of pod m-2 and 100 seed weight while significant for seeds number pod-1and not significant for pod length and seeds weight pod-1, line1 recorded the highest value of most traits. All yield component traits of narbon vetch responded highly significantly to different harvesting stages, maximum values of most traits exhibited by control treatment. The interaction between the lines and harvesting stages was highly significant on no. of pods m-2 and 100 seed weight while the effect was significant on seeds number pod-1 and seeds weight pod-1 but not significant for pod length. The effect of locations on yield components of narbon vetch were highly significant for all characters. Kanipanka location exceeded Qlyasan location and gave the highest values of these traits no. of pods.m-2, pods length, seeds number pod-1 and seeds weight pod-1, while Qlyasan location had the highest value of 100 seed weight, in compare to Kanipanka location.
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