Effects of Cyclobalanopsis glauca (Thunb.) Oerst Mycorrhizal Systems on the Interception and Absorption Ability of Cadmium

• Main Authors: Hsin-Huei Liu, 劉心慧
• Other Authors: Hung-Tao Hu
• Format: Others
• Language: zh-TW
• Published: 2001
• Online Access: http://ndltd.ncl.edu.tw/handle/46650416749091035042

碩士 === 國立臺灣大學 === 森林學研究所 === 89 === The purpose of this study was to compare the effects of mycorrhizal and non-mycorrhizal seedlings on the interception and absorption ability of cadmium. 0, 10, 20, 40, and 80 ppm cadmium (Cd) (as CdCl2．2.5H2O solution) was added to dibbling tubes which grew 1.5-year-old mycorrhizal or non-mycorrhizal Cyclobalanopsis glauca (Thunb.) Oerst seedlings. During this study, total 500 or 600 ml cadmium chloride solution was added. The same amount of cadmium chloride solution was also added to the dibbling tubes which contained the artificial soil only. The results showed that the content of Cd in shoot was not significantly different (p＞0.05) between inoculated seedlings and uninoculated seedlings, but the amount of Cd in leaching solution could be reduced by inoculated seedlings. The application of different Cd concentrations would significantly affect (p＜0.05) the amount of Cd in leaching solution. The applied concentration of Cd was significantly positive related (p＜0.01) with amounts of Cd (r=0.875) and sodium (Na) (r=0.602) of shoot of uninoculated seedlings, but there was no significant relation with other elements. The Cd content of shoot of seedlings was significantly positively related (p＜0.05) with amounts of nitrogen (N) (r=0.488), Na (r=0.691) and copper (Cu) (r=0.449). The applied concentration of Cd was significantly positively related (p＜0.01) with amounts of Cd (r=0.681), N (r=0.576) and Na (r=0.691) of shoot of inoculated seedlings, and was significantly negatively related (p＜0.05) with amounts of iron (Fe) (r=0.681). The Cd content of shoot of seedlings was significantly positively related (p＜0.05) only with amounts of Na (p＜0.01; r=0.507). It was approved that the high concentration of Cd at 40 and 80 ppm would be harmful to the mycorrhizal development and the fungus mantle became yellowish brown.