关键词: 报纸肥料； 小白菜； 镉污染； 根系耐性指数； 转移系数

Abstract:

We adopted pot culture method to study the transport law of the cadmium in the ground and underground parts of  cabbage system after the  addition of the homemade newspaper fertilizer. In each group, the analysis of cabbage biomass shows that if the cadmium was added, the use of fertilizer would promote the roots of the cabbage to absorbe cadmium. When the concentration of cadmium was 40 mg/kg, the absorption of cadmium was increased to  215.5% compared to that of blank. With the increasing of the concentration of the fertilizer, there was no obvious  inhibitory action on the growth of the cabbage’s roots. When the cadmium was polluted, there was also little influence on the ground part of the cabbage. The supplement of the fertilizer still promoted the growth of the ground part of the cabbage. As the fertilizer concentration was 3 g/kg, the promoting effect was the highest. The root tolerance index (RTI) and transport factor (TF) of cabbage were analyzed. The results show that the root of the cabbage had great effect on the cadmium pollution. After its root came into contact with cadmium, most of the cadmium was kept in root, rather than moving.

Key words: newspaper fertilizer, cabbage, cadmium pollution, root tolerance index, transport factor