Two things are fertilising this growth.

有两件事促进了这种增长。

Those researchers, led by Wajih Naqvi and Victor Smetacek, created a bloom of phytoplankton by fertilising an area of 300 square kilometres with six tonnes of iron sulphate, which dissolves in water.

这些由Wajih Naqvi和维克多•斯莫塔希克领导的研究者给300平方公里的海域里面投加了6吨的可溶于水的硫酸铁作为浮游生物的肥料已让他们生长。