【摘要】 研究了广州地区城市绿地系统森林植物-土壤系统生物同化、吸储、固定C,P,K,SO2,Pb,Cd的生态效益,结果表明:研究区域内绿地系统土壤中有机C储量最高达184t/hm2,最低为24.6t/hm2;TN储量最高达16.7t/hm2,最低为2.0t/hm2;Pb,Cd储量最高分别达837.4kg/hm2、3.9kg/hm2,最低分别为577kg/hm2、1.2kg/hm2;植物叶对SO2的积累量以高山榕最高,海芒果最低;小叶榕叶吸收固定Pb量最高为22.6g/hm2,尾叶桉叶和白玉兰叶吸收固定Cd量最高达0.15g/hm2。更多还原

【Abstract】 The ecological benefit of biological assimilation, uptake and fixation of C, P, K, SO2, Pb and Cd of the plant-soil system in urban green land. Results indicated that: the highest reserve of soil organic C reached 184 t/hm2 and the lowest was 24.6t/hm2; the highest TN reserve was 16.7t/hm2 and the lowest was 2.0t/hm2; the highest reserves of Pb, Cd was 837.4kg/hm2 and 3.9kg/hm2 respectively and the lowest was 577kg/hm2 and 1.2kg/hm2 respectively. The accumulation SO2 was the highest in leaves of Ficus altissima and the lowest in Cerbera manghas. The highest uptake and fixation of Pb was 22.6g/ hm2 in Ficus microcarpa, and the highest uptake and fixation of Cd reached 0.15 g/hm2 in the leaves of Eucalyptus urophylla and Magnolia heptapeta. Forests established by the project "Mountain reforestation and land greening" are able to assimilate, uptake and fix polluting chemical elements, brin ging go od eco logical and environmental benefits.更多还原