桃園縣鎘污染農田改良技術之研究

Study on the Technique of Improving the Cd-polluted Soil in Taoyuan

廖乾華(Chien-Hua Liao) ； 傅仰人(Yeng-Jen Fu)

《桃園區農業改良場研究報告》 6期 (1990/09) Pp. 49-55

https://doi.org/10.29567/ZHWHGX.199009.0005

摘要

本試驗之主要目的在探討桃園縣鎘污染農田種植非食用性之花卉及觀賞植物的可行性。試種植物有唐菖蒲、黃金榕、葵百合、玫瑰及杜鵑等五種花卉，四重複，小區面積為6平方公尺，花卉施肥方法依一般慣用量施以43號複合肥料。試驗前採取土壤分析，結果其pH值為5.0，有機質含量2.7%，每公頃有效性磷酐含量264公斤，交換性氧化鉀含量391公斤，交換性氧化鈣含量3948公斤，氧化鎂含量689公斤，有效性鎘、鉛含量分別為2.0 ppm及15 ppm。在此土壤環境下，五種花卉的生育情形均甚為良好。花卉植體中之鎘含量，以乾物重計算，葵百合：花約含12.4 ppm，莖葉29.4 ppm；唐菖蒲：花13.6 ppm，梗葉7.8 ppm；玫瑰：花0.55 ppm，莖葉1.86 ppm；杜鵑：枝葉4.1 ppm；黃金榕：枝葉0.73 ppm。顯見此五種園藝作物中對鎘的吸收力有很大的差別，依植物體含量多少順序為葵百合＞唐菖蒲＞杜鵑＞玫瑰＞黃金榕。就經濟效益言，種植此五種花井，均獲利甚豐，值得推廣。

並列摘要

The experiment was conducted in Taoyuan Hsien to study the feasibility of growing flower plants to improve the Cd-polluted soli. Five flower plants, sword lily, rose, lily, golden banyan, azalea were planted with four replications and complex fertilizer of No.43 was applied according to standard amount of each flower. The soli properties of Cd-polluted farm were analyized. The results showed as follows: pH 5.0, O.M. 2.7%, available phosphorus 264 kg/ha P2O5, exchangeable potassium (K2O) 391 kg/ha, exchangeable calcium (CaO) 3948 kg/ha, exchangeable magnesium (MgO) 689 kg/ha, available cadmium 2.0 ppm, and available lead 15 ppm. On the polluted soil, these five flower plants performed very well. The distribution of cadmium concentration in flower plants, calculated based on dry matter, were respectively as follows: lily: flower 12.4 ppm, Shoot 29.4 ppm; sword lily: flower 13.6 ppm, shoot 7.8 ppm; rose: flower 0.5 ppm, shoot 1.86 ppm; azalea: shoot 4.1 ppm; golden banyan: shoot 0.73 ppm. The abilities of five flower plants to uptake Cd from soil were decreased in the sequence of lily ＞ sword lily ＞ azalea ＞ rose ＞ golden banyan. The results suggested that at the present level of technology, cultivation of flower plants maybe considered as an alternative improvement method for Cd-polluted soil.