Moraes Vinícius Cordeiro de, Zeny Pedro Maia, Ruivo Lilyan Barbosa, Owatari Marco Shizuo, Lopes Rafael Garcia, Schiebelbein Luis Miguel, Derner Roberto Bianchini, Ohse Silvana
Depatament of Phytotechny, State University of Ponta Grossa (UEPG), Ponta Grossa, Brazil.
Laboratory of Algae Culture, Federal University of Santa Catarina (UFSC), Florianópolis, Brazil.
Environ Technol. 2025 Aug;46(20):4111-4122. doi: 10.1080/09593330.2025.2485361. Epub 2025 Apr 2.
Algae are known for their rich nutrients, which can enhance productivity of agricultural crops, making them valuable biostimulants. However, the use of microalgae for this purpose is still in its early stages, and there have been no studies conducted on lupine crops in Brazil so far. This study aimed to investigate the impact of microalgae extracts on the growth and productivity of white lupine. The experiment included four different microalgae extracts (, , , and ), applied either once or twice, along with a control group. The results showed that there was no interaction between the number of applications and the type of microalgae extract applied via foliar application in white lupine crops. The microalgae extracts did not have a significant impact on the 100-grain weight and yield of white lupine crops. The average height of white lupine plants at harvest was 117.04 cm, regardless of the treatment. However, there was a significant increase (13.12%) in the number of seeds per pod of white lupine with a single application of microalgae extract, regardless of the specific extract used. The height of the white lupine plants was not affected by the treatments during both the vegetative and reproductive phases. Further research is needed to optimise the bioactive extraction process, identify metabolites with biostimulant potential in the extracts, and determine the most effective application method (soil, seed, or foliar), as well as the optimal timing and frequency of foliar applications based on the crop's phenological stages.
藻类以其丰富的营养成分而闻名，这些营养成分可以提高农作物的产量，使其成为有价值的生物刺激剂。然而，将微藻用于此目的仍处于早期阶段，到目前为止巴西尚未对羽扇豆作物进行过相关研究。本研究旨在调查微藻提取物对白羽扇豆生长和产量的影响。该实验包括四种不同的微藻提取物（、、和），施用一次或两次，同时设置一个对照组。结果表明，在白羽扇豆作物中，通过叶面喷施的微藻提取物施用次数与类型之间没有相互作用。微藻提取物对白羽扇豆作物的百粒重和产量没有显著影响。收获时，无论处理如何，白羽扇豆植株的平均高度为117.04厘米。然而，无论使用哪种特定提取物，单次施用微藻提取物都会使白羽扇豆每荚种子数显著增加（13.12%）。在营养生长和生殖生长阶段，白羽扇豆植株的高度均不受处理影响。需要进一步研究以优化生物活性提取过程，鉴定提取物中具有生物刺激潜力的代谢物，确定最有效的施用方法（土壤、种子或叶面），以及根据作物物候期确定叶面喷施的最佳时间和频率。
