白浆型床土人参红皮病发生原因的研究

本文采用生态样块的方法，对白浆土区人参红皮病发生条件做了较深入的研究。结果表明，在床土处于田间持水量且通气状况良好情况下，活性还原有机物质仍可形成，并促进土壤铁，锰氧化物活化，使亚铁，二价锰积累。人参红皮病是亚铁在参根周皮氧化沉积的结构，也可能是参根对亚铁毒害作用的保护性反应，而二价锰对红皮病有抑制作用。

STUDY ON THE CAUSES FOR GINSENG RED SKIN SICKNESS OCCURRED IN ALBIC BED SOIL

In the work, the reason of ginseng red skin sickness in albic soil were studied by the ecological quadrat methods. Results showed that active reducing organic substances could form in bed soil under moisture capacity and well aerated conditions, and they promoted the activation of iron and manganese oxides and enhanced the accumulation of divalent iron and manganese. Ginseng red skin sickness could be attributed to the oxidizing and depositing of ferrous iron in epidermis of ginseng root or to the protective reaction of ginseng root to poisonousnss of ferrous ions. The results also showed that divalent manganese inhibited ginseng red skin sickness. In the bed soil, active reducing substances is the induced factor and ferrous ions is the leading factor in the occurrence of ginseng red skin sickness.