栽培光強度、養液中鋅濃度及葉面施肥對生蠔葉葉數及葉片中鋅含量之影響

Abstract

鋅為人體必需的微量元素之一，為了提高高鋅蔬果之鋅含量作為天然鋅來源，以生蠔葉（Mertensiamaritime）為材料，於植物工廠中進行藉由光強度及以由養液、葉面施肥提供鋅元素，以期能提高生蠔葉葉片鋅含量。栽培過程中提供9R1B LED人工光源光強度230±20 μmol m^(-2) s^(-1)照射16 小時，提高栽培養液中鋅濃度至1 ppm或以含有1 ppm鋅濃度之硫酸鋅水溶液進行葉面施肥，除了可提高生蠔葉生長速率外，其鋅含量更提高至21.4mg/100g，提升以生蠔葉做為天然鋅來源之效率。

Zinc (Zn) is one of the necessary microelements for human health. Oyster leaf (Mertensia maritime) was high Zn content in plant body. In this study, oyster leaf was cultivated in plant factory associated with artificial 9R1B LED irradiation at 230±20 μmol m^(-2) s^(-1) and 16 h photoperiod. Zinc level of nutrient solution was adjusted up to 1 ppm for hydroponic system or foliar fertilization. Results demonstrated that this cultivation management not only led to maximum quantity of harvestable leaf per plant per week but also increased the Zn content up to 21.4 mg/100g in leaf tissue. This management can be used to produce high-Zn oyster leaf for natural and healthy Zn consumption.