This study evaluated the effect of phosphorus and potassium (PK) fertilizer levels and foliar seaweed extract on early and total yield productivity and the growth of globe artichoke plants. Field experiments were conducted over two seasons on loamy–clay soil at the vegetable research farm, of the Faculty of Agriculture, Alexandria University, Egypt. Fertilizer levels of 0, 25, 50 and 75 mL L⁻¹, and seaweed extract concentrations of 0, 5 and 10 mg L⁻¹, individually and in combination, were used. Globe artichoke plants treated with PK liquid fertilizer, with and without seaweed extract, showed critical increases in growth (plant height and number of leaves per plant as well as foliage dry weight), yield, and some chemical constituents compared to untreated plants. The PK₃ fertilizer level and 10 mL L⁻¹ seaweed extract as a foliar spray showed greater effects than other combinations.

中文翻译：

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使用基于生态友好的海藻提取物的生物刺激剂和 PK 肥料提高朝鲜蓟的早期和总产量

本研究评估了磷和钾 (PK) 肥料水平以及海藻叶面提取物对朝鲜蓟植物早期和总产量以及生长的影响。在埃及亚历山大大学农业学院的蔬菜研究农场在肥沃粘土上进行了两个季节的田间试验。肥料水平为 0、25、50 和 75 mL L ^-1，海藻提取物浓度为 0、5 和 10 mg L ^-1，单独和组合使用。与未经处理的植物相比，用含有和不含海藻提取物的 PK 液体肥料处理的朝鲜蓟植物在生长（植物高度和每株叶子的数量以及叶子干重）、产量和一些化学成分方面都有显着的提高。PK ₃施肥水平和 10 mL L ^-1海藻提取物作为叶面喷雾显示出比其他组合更大的效果。