In the present study, brown seaweed - Fucus vesiculosus was used as a raw material for the preparation of bio-products for sustainable agriculture. Biosorption was applied to produce fertilizer additives with microelements. F. vesiculosus was enriched with Cu(II) and Zn(II) ions. Biostimulants of plant growth were obtained by seaweed extraction with potassium hydroxide. Different doses of enriched F. vesiculosus (1, 2, 4, 6 mg/per Petri dish) and concentrations of seaweed extract (2.5, 5 and 10%) were examined in germination test on garden cress (Lepidium sativum). The effect of both algal products on the plant length, RGB parameters in leaves and biomass multielement composition was examined. Results showed that the biomass enrichment did not influence plant length and RGB parameters. Taking into account these two parameters, the best results were obtained in the group treated with natural F. vesiculosus (higher than in the control group, treated with distilled water). Enriched F. vesiculosus biofortified garden cress with Cu and Zn. In the case of Fucus extract, 5% concentration increased plant length and the value of RGB parameters when compared with the control group. Also this extract concentration resulted in elevated content of micro- and macroelements in Lepidium sativum. Seaweed extract is recommended for further research as biostimulant of plant growth.

Highlights
- Fucus vesiculosus is a valuable raw material for agriculture.
- Fucus vesiculosus extract can act as biostimulants of plant growth.
- Fucus vesiculosus enriched with microelements via biosorption can be used as a fertilizing material providing plants with these nutrients.
- Fucus products can biofortify edible plants in essential microelements.
- Fucus extracts can enhance plant length and chlorophyll content.

在本研究中，褐海藻 - Fucus vesiculosus被用作制备可持续农业生物产品的原料。生物吸附用于生产含有微量元素的肥料添加剂。F. vesiculosus富含 Cu(II) 和 Zn(II) 离子。通过用氢氧化钾提取海藻获得植物生长的生物刺激剂。不同剂量的富集F. vesiculosus在发芽试验检查对独行菜（1，2，4，6毫克/每培养皿）和海藻提取物（2.5,5和10％）的浓度（独行菜豌豆）。检查了两种藻类产品对植物长度、叶子中的 RGB 参数和生物量多元素组成的影响。结果表明，生物量富集不影响植物长度和RGB参数。考虑到这两个参数，在用天然F. vesiculosus处理的组中获得了最好的结果（高于用蒸馏水处理的对照组）。富含铜和锌的F. vesiculosus生物强化水芹。在墨角藻提取物的情况下，与对照组相比，5% 的浓度增加了植物长度和 RGB 参数值。此外，这种提取物浓度导致Lepidium sativum 中微量元素和常量元素的含量升高. 建议将海藻提取物作为植物生长的生物刺激剂进行进一步研究。

亮点
- Fucus vesiculosus 是一种宝贵的农业原料。
- Fucus vesiculosus 提取物可以作为植物生长的生物刺激剂。
- 通过生物吸附富含微量元素的墨角藻可用作施肥材料，为植物提供这些营养。
- Fucus 产品可以在必需微量元素中对可食用植物进行生物强化。
- 墨角藻提取物可以增加植物长度和叶绿素含量。