从高亲和性和低亲和性K⁺吸收两个方面较详细介绍了K⁺营养的吸收机制。高亲和性K⁺吸收机制包括H⁺-K⁺交换ATPase、K⁺-ATPase、H⁺-K⁺ symporter和Na⁺-K⁺ symporter；低亲和性K⁺吸收机制也被称为“协助扩散”，研究表明是通过K⁺通道进行的，但K⁺通道的确切结构尚无定论。综述了植物K⁺吸收的调节，并对相关问题进行了展望。

The paper summed up the advances of potassium uptake mechanism in biochemical molecular fields involved in potassium channel,high-affinity potassium transporter and H⁺-ATPase.The potassium transport in plants correlates respectively to the three types of proteins coded by different potassium transporter family.The review focuses on describing the characteristic of the cloned K⁺ transporters and their possible roles in mediating high and low-affinity K⁺ uptake from the soil as well as how K⁺ acquisition regulated with the different level of K⁺.