The depletion of the argan area over time underscores the importance of enhancing the quality of argan seedlings to support regeneration. Key factors such as seedling age and nursery techniques including shade, substrate, and container play a crucial role in improving seedling quality and ensuring successful transplantation. Our study assessed the impact of seedling age, shading, substrate composition, and container volume on argan seedling production during the nursery phase and their influence in the transplantation phase. The findings revealed 40% shade covering in 12- and 18-month-old seedlings exhibited the most growth potential, while unshaded compartments were suitable for 6-month-old seedlings. Substrates S1, S3 and S6 respectively, resulted in the highest quality seedlings overall, with S1 being the most effective for 6-month-old seedlings, and S3 and S6 showing more impact for 12- and 18-month-old seedlings. Furthermore, the use of larger containers contributed to the production of high-quality seedlings. Field results showed lower mortality rates across different seedling ages (3.1% to 9.3%) and revealed no significant difference among the combinations, except for seedlings produced under 40% shade, where the S3C3 combination followed by S1C2 in the 6-month nursery production period demonstrated the highest relative growth rate in shoot length. The relative growth rate in diameter reported its highest value in the S1C2 combination of 18-month and 6-month-old seedlings. A cost benefit analysis was carried out, which revealed that the cost-effective combination was S1C2, followed by S3C3 for 6-month-old nursery age under the 40% compartment.

中文翻译：

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Argania spinosa 的苗圃生产、驯化和果园移植：评估成本和植物年龄的影响


随着时间的推移，摩洛哥坚果面积的消耗凸显了提高摩洛哥坚果幼苗质量以支持再生的重要性。幼苗年龄和苗圃技术（包括阴凉处、基质和容器）等关键因素在提高幼苗质量和确保成功移植方面起着至关重要的作用。我们的研究评估了幼苗年龄、阴影、基质成分和容器体积对育苗阶段摩洛哥坚果幼苗生产的影响及其在移植阶段的影响。研究结果显示，12 个月和 18 个月龄幼苗中 40% 的遮荫覆盖率表现出最大的生长潜力，而无遮荫隔室则适用于 6 个月龄的幼苗。基质 S1、S3 和 S6 分别产生了总体上最高质量的幼苗，其中 S1 对 6 个月龄的幼苗最有效，而 S3 和 S6 对 12 个月和 18 月龄的幼苗影响更大。此外，使用更大的容器有助于生产高质量的幼苗。田间结果表明，不同苗龄的死亡率较低（3.1% 至 9.3%），并且组合之间没有显着差异，除了在 40% 阴影下生产的幼苗，其中 S3C3 组合和 S1C2 在 6 个月的苗圃生产期内表现出最高的相对生长率芽长。直径的相对生长速率在 18 个月和 6 月龄幼苗的 S1C2 组合中报告了其最高值。进行了成本效益分析，结果显示，对于 40% 隔间以下的 6 月龄保育，成本效益组合为 S1C2，其次是 S3C3。