potassic

例句：

1. 1. Potassium is an essential mineral for plant growth.
   钾是植物生长所必需的矿物质。
2. 2.The soil test showed a low level of potassium in the plants' roots.
   土壤测试显示植物根部的钾含量很低。
3. 3.The potassium chloride added to the water helps to prevent algae growth.
   向水中添加的氯化钾有助于防止藻类生长。