钒对大豆幼苗的毒害与土壤特性的关系

温室盆栽试验研究结果表明，在潮土中钒含量高于30mg／kg，大豆幼苗地上部和地下部干物质量显著减少（＞1％L．S．D）；而在红壤中，钒含量高达75mg／kg，对大豆幼苗的生长也没有明显的影响（＜5％L．S．D）。潮中易产生钒毒害的机理可能是因为对钒的吸附容量小，在土壤溶液中保持有较多量的有效钒供给大豆幼苗，并已当土壤pH变化时仍然保持对钒较高的吸附能力和供给能力。

Toxicity of Vanadium on Soybean Seedlings and Relationship with Soil Characteristics

In the fluvo-aquic soil, as the concentration of V added in soil was more than 30 mglkg, the drymatter yields of shoots and roots were significantly decreased (> 1 %L.S.D), while in the red soil, no markedstunted effects were observed (<5%L.S.D), even when the concentration of V added to the soil was as high as75 mg/kg. The symptom of V toxicity appeared in the fluvo-aquic soil, because it had lower adsorptioncapacity of V than the red soil, so there was much higher concentration of available V in the soil solution tosupply to the growth of soybean seedlings.