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作 者 ：刘国栋;刘更另

期 刊 ：植物营养与肥料学报 1995年 1卷 2期 页码：47-53

关键词：吸钾速率；钾素利用效率；吸钾速率的调控；

Keywords:Potassium influx rate, Potassium utilization efficiency. Regulation of K influx.,

摘 要 ：本试验研究了三叶期稻株不同钾素营养状态,IAA(indole-3-acetic.acid),REM(metal.mixture.including.rare.earth)和NaVO₃对水稻基因型吸钾速率的调控作用。以1mol/L.K⁺处理15分钟后,NaVO₃则极显著地抑制水稻对钾的吸收。REM和NaVO₃的作用可以相互抵消。REM还可极显著地提高水稻的生物产量和钾素利用效率。说明水稻对钾的吸收可进行正向或反向调控。

Abstract:Potassium(K) influx rates of 4 O. indica genotyes were regulated by cell potassium status, IAA, REM and NaVO₃ at 3-Leaf stage. The K influx rate was markedly promoted by both IAA and REM (metal mixture including rare earth). However it was significantly decreased when treated preliminarly with 1 mmol L^-1 K⁺ for 15min. Similarly, NaVO₃ inhibited the K influx rate significantly or extremely significantly as well. The effects of REM and NaVO₃ were counteractive. REM also increaesd biomass and K utilization efficiency. It indicated that K influx of rice could be regulated in two directions.

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