supplementary fertilizer

例句：

1. 1. Tomatoes need a good amount of nitrogen to grow well, so it's important to use supplementary fertilizers.
   西红柿需要足够的氮来生长良好，所以使用补充肥料很重要。
2. 2.The farmer applied the supplementary fertilizer before planting the seeds.
   农民在播种前施用了补充肥料。
3. 3. The soil in this area is deficient in nutrients, so we need to use supplementary fertilizers to improve its quality.
   这个地区的土壤缺乏养分，所以我们需要使用补充肥料来提高其质量。