下水道污泥對荷花生長與礦物成分之影響

Effect of Sewage Sludge on Growth and Mineral Composition in Chrysanthemum

利用砂／杉木屑或水苔泥炭／蛭石或水苔泥炭／真珠砂之無土混合介質（體積比1：1）拌入1/3-2/3體積之脫水下水道污泥，栽植Treasure Chest及Wedgewood盆菊，結果拌有污泥介質，菊葉含氮、磷、鉀、鈣，鎂、硼鋅、銅、鉬、鎘、鉻、鎳和鉛等較高，但除鋅外，均在認為正常濃度範圍。菊葉含鋅量達2,280ppm，但葉尚未看出鋅毒害症狀。臺北市民生社區之下水道污泥可供為介質、低成分肥料及介質改良劑之用，以之與砂／杉木屑混合可生產具販賣價值之盆菊，但污泥用量不宜超出1/2體積。

Two cultivars of chrysanthemum were grown on sand/sawdust (1:1), peat/vermiculite or peat/perlite mixes amended with 1/3~1/2 volume of digested sewage sludge and fertilized with complete nutrients or NK fertilizers. Sludge supplied much higher amount of N, P, K, Ca, Mg, B, Zn, Cu, Mo, Cd, Cr, Ni and Pb than control. Although the high Zn content (up to 2280ppm) in leaves, they could not show the visal toxic symptom in the leaves of cvs Treasure Chest and Wedgewood chrysanthemum. The sewage sudge was found to be an effective ingredient and as a low analysis fertilizer for potting media for chrysanthemum when nutrients or NK are applied from chemical sources. The results suggested the sand/sawdust mixes could amend half volume of sludge for plant growth.