Abstract

Flax seeds (Linum usitatissimum L.) are known to be very useful source of fiber and nutrition soil; also boi-fish extract has shown to be a from of organic fertilizer of very high quality. Our objective is to contribute to the research effort to produce healthy, safe and organic crops, while saving the soil from being damaged and the environment for any harmful materials. Therefore, we conducted study in Omar-Mukhtar Al-Jabal Al-Akhdar district in northeastern Libya, in the growing seasons of 2016–17 and 2017–18 in to examine the effect of marine bio-fish extract as organic fertilization and of different cultivation dates on improving yields for three flax varieties cultivated. The experiment was laid under split-split plot design utilizing three-factor complete randomized block design organized with three replicates. Bio-fish extract was added to the main plots at a rate of 5 L/ha and control, sub-plots to three flax varieties (Giza11, L.22 and Sakha4) sub-sub plots, on two cultivation dates of 11 October and 11 November. Agronomic Efficiency (AE) of the flax crop with adding the bio-fish extract for L.22 was 0.034 and 0.018 t grain ha/L for seasons 2016/17 and 2017/18, respectively. The higher grain yield was 1.50 t/ha for season 2016/17 and 0.53 t/ha for season 2017/18, when adding the fish extract for strain L.22 and cultivation date of 11 October. Thus, adding the fish extract led to an increase in grain yield, oil, and fiber content. With the bio-fish fertilization, strain L.22 was better in oil. Also, sowing on November 11 with the addition of fish extract resulted in a higher fiber proportion in the yielded crop.