关键词: 土壤有机质, 模型, 比较

Abstract: Taking Lonicera japonica as test object, a soil culture experiment was conducted to study its leaf water content and plant microelement uptake under the stress of different concentration cadmium (Cd). With the increasing Cd concentration in soil, the leaf water content decreased after an initial increase. Under the stress of 100 and 200 mg Cd·kg^-1, the leaf water content was 70.4% and 65.3%, respectively, and had no significant difference from the control. Cd stress promoted the Fe uptake by roots, but decreased the Mn, Cu, and Zn uptake. Compared with the control, Cd stress decreased the leaf Cu content. The leaf Fe, Mn, and Zn contents increased under low concentration Cd stress, but decreased with increasing Cd concentration.

Key words: Soil organic matter, Models, Comparison