The quality of sweet pepper seedlings is of paramount importance for optimal growth and yield in terms of both quality and quantity. This study examines the impact of two commercially available humic acid-based biostimulants applied pre and post transplantation of seedlings on the growth, yield, and fruit quality of a snack-type sweet pepper, Capsicum annuum L. 'Cuccino Orange', at three key harvest dates. The results demonstrated that the application of the first biostimulant (Humic Blast) pre and post transplantation, significantly increased both yield (108.4 %) and fruit number per plant (123.9%) compared to control. Treated plants exhibited fruit with higher levels of glucose and fructose compared to untreated plants (10 to 18 %). However, other fruit parameters, such as length, width, and pericarp thickness, were not affected by the biostimulant treatments. While phenolic content varied among treatments, no consistent trend could be established, suggesting a complex interplay between humic acid application and secondary metabolite synthesis. The findings highlight the significance of selecting an optimal biostimulant application pattern. The application of biostimulants to seedlings has been demonstrated to enhance fruit growth and development, particularly when additional treatments are administered during the growing season. This has the additional benefit of improving yield. Overall, this research provides valuable insights into the optimal use of humic acid-based biostimulants in pepper production and offers practical guidance for growers seeking to maximize crop productivity.

中文翻译：

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移植前后腐植酸生物刺激剂处理和收获日期对甜椒 （Capsicum annuum L.） 产量、数量和质量参数的影响


甜椒幼苗的质量对于最佳生长和产量在质量和数量方面都至关重要。本研究考察了两种市售的基于腐植酸的生物刺激剂在幼苗移植前后施用对零食型甜椒 Capsicum annuum L. 'Cuccino Orange' 的生长、产量和果实质量的影响，在三个关键收获日期。结果表明，与对照相比，在移植前后施用第一种生物刺激剂 （Humic Blast） 显着提高了产量 （108.4%） 和每株果实数 （123.9%）。与未处理的植物 （10% 至 18%） 相比，处理过的植物表现出葡萄糖和果糖水平更高的果实。然而，其他水果参数，如长度、宽度和果皮厚度，不受生物刺激剂处理的影响。虽然酚类物质含量因处理而异，但无法建立一致的趋势，这表明腐植酸应用和次生代谢物合成之间存在复杂的相互作用。研究结果强调了选择最佳生物刺激剂应用模式的重要性。生物刺激剂应用于幼苗已被证明可以促进果实的生长和发育，尤其是在生长季节进行额外处理时。这还有一个额外的好处，那就是提高产量。总体而言，这项研究为在辣椒生产中最佳使用基于腐植酸的生物刺激剂提供了宝贵的见解，并为寻求最大限度地提高作物生产力的种植者提供了实用指导。