The present study was aimed at determining the influence of adding different amounts of spent coffee grounds (SCG) on germination percentage (GP) and mean germination time (MGT), seedling characteristics, and seedling biomass of different components of containerized 1 + 0 stone pine seedlings. Six different media were prepared including 100% conventional media, 100% sand, 10% SCG + 90% sand, 20% SCG + 80% sand, 30% SCG + 70%, sand and 100% SCG. While GP is 90% in the media where the SCG ratio is 10%, GP values decrease to 50% as the SCG ratio increases. The greatest seedling height values were found in conventional media (14.4 cm), followed by the seedlings in 100% sand with 11.4 cm and 20% SCG + 80% sand with 11.1 cm. The highest root collar diameter was found in 20% SCG + 80% sand with 3.9 mm. The highest root/shoot ratio (0.7) was obtained in 10% SCG + 90% sand. Total seedling biomass was the greatest in conventional media (2.1 g). As SCG increased in the media, N, K, Mg, and P concentrations increased, and Ca concentration and C/N ratio decreased in all seedling components (needle, main root, lateral root, and stem). Results point to the possibility of using a small amount of SCG to alter seed germination, seedling characteristics, and nutrient uptake for production of containerized stone pine seedlings.

中文翻译：

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利用废咖啡渣作为石松（Pinus pinea）幼苗的培养基

本研究旨在确定添加不同数量的废咖啡渣 (SCG) 对容器化 1 + 0 石松不同成分的发芽率 (GP) 和平均发芽时间 (MGT)、幼苗特性和幼苗生物量的影响。幼苗。制备了六种不同的介质，包括 100% 常规介质、100% 沙子、10% SCG + 90% 沙子、20% SCG + 80% 沙子、30% SCG + 70% 沙子和 100% SCG。虽然在 SCG 比率为 10% 的媒体中 GP 为 90%，但随着 SCG 比率的增加，GP 值会下降到 50%。在常规培养基中发现了最大的苗高值（14.4 cm），其次是在 100% 沙子中的幼苗，11.4 cm 和 20% SCG + 80% 沙子，11.1 cm。在 20% SCG + 80% 沙子中发现了最高的根环直径，直径为 3.9 mm。最高的根/芽比 (0. 7) 在 10% SCG + 90% 砂中获得。总幼苗生物量在常规培养基中最大（2.1 g）。随着培养基中 SCG 的增加，N、K、Mg 和 P 浓度增加，所有幼苗组分（针、主根、侧根和茎）的 Ca 浓度和 C/N 比降低。结果表明使用少量 SCG 来改变种子发芽、幼苗特性和养分吸收以生产集装箱石松幼苗的可能性。