都市農園蔬菜栽培之適用介質配方

Suitable Medium Formulas for Vegetable Cultivation in Urban Farm

本研究篩選同時適合蔬菜苗期及生長期生長且成本較低的介質配方。以泥炭土（PM）、不同顆粒大小蛭石（V#2&V#3）和真珠石（P#2&P#3），分別調配成1:1:1、3:1:1四種配方，栽培蕹菜（Ipomoea aquatica Forsk.）、莧菜（Amaranthus mangostanus L.）和葉萵苣（Lactuca sativa L.）三種蔬菜。結果顯示苗期莧菜和生長期蕹菜於介質配方PM:V#2:P#2=3:1:1和PM:V#3:P#3=3:1:1生長表現較佳。因介質比例3:1:1之EC值和容器容水量高於介質比例1:1:1者，可能較適合生長快速且需水性高的葉菜類，故栽培於介質比例3:1:1之植株表現普遍優於1:1:1，加上介質比例3:1:1成本較低，因此適合作為推廣都市農園建議使用之介質配方。 This study intends to select a suitable and economical media formula for growing vegetables in seedling and growth stages. Peat moss (PM), different particle sizes of vermiculite(V#2&V#3) and perlite (P#2&P#3) were combined into ratios of 1: 1: 1and 3: 1: 1 respectively to create four media formulas. Water convolvulus (Ipomoea aquatica Forsk.), edible amaranth (Amaranthus mangostanus L.) and leaf lettuce (Lactuca sativa L.) were cultured in those media and examined for growth. The results showed that edible amaranth during the seedling period and water convolvulus during the growth period had better growth performance in the media formula PM:V # 2:P # 2 = 3: 1: 1 and PM:V # 3:P # 3 = 3: 1: 1. EC value and container water-holding capacity were higher with the 3:1:1 media ratio than with the 1:1:1 media ratio. Therefore, media ratio of 3:1:1 may be more suitable for fast-growing and high water-demand leafy vegetables. Accordingly, the media ratio of 3: 1: 1 resulted in better growth performance than that of the media ratio 1: 1: 1 in most conditions. Since media ratio 3:1:1 also had lower cost, it is more suitable in urban farm.