potassium phosphate

例句：

1. 1. Potassium phosphate is an essential nutrient for plant growth.
   磷酸钾是植物生长所必需的营养元素。
2. 2.The soil test showed that the potassium phosphate levels were low in this area.
   土壤测试结果显示，该地区的磷酸钾含量较低。
3. 3. The farmer applied potassium phosphate fertilizer to the field to improve the soil's fertility.
   农民在田地里施用磷酸钾肥料，以改善土壤的肥力。