钒对水稻生长的影响——溶液培养研究

TOXICITY OF VANADIUM TO RICE PLANTS

通过水培试验 ,研究钒对水稻的毒害及钒与磷相互作用的影响 .试验结果表明 ,低浓度钒对水稻生长没有显著影响 ,但是随着钒浓度的不断增加 ,对水稻的干物质重量和根系生长均不利 .如钒浓度为 1 2 8mg·l- 1 时 ,水稻茎叶和根系的干重分别比不施钒的对照减少 49 9%和 5 5 1 % ,钒浓度愈高植株干重愈少 ,根系生长不良 ,表现出明显的钒中毒症状 .水稻茎叶及根系中磷的含量与钒的含量均呈极显著的负相关关系 .随着溶液中钒浓度的增加 ,水稻茎叶及根系吸收的钒量逐渐增加 ,而吸收的磷量却呈下降趋势 。

Toxicity of vanadium to rice plants and interaction of vanadium and phosphorus in solution culture were studied.The results indicate that the growth of rice plants was not affected at a low vanadium concentration,but the biomass and root growth of rice plants decreased as the vanadium concentration in the solution increased.The biomasses of shoots and roots decreased 49 9% and 55 1% respectively compared with the control treatment.The higher the vanadium concentration was,the worse the rice roots grew,and the rice plants showed toxic symptom of vanadium.The phosphorus and vanadium concentration both in the shoots and roots were negatively correlated.The vanadium accumulated in the shoots and roots increased but the phosphorus decreased with the increase of the vanadium concentration in the solution.