测试肥料对向日葵生长的影响，延时摄影。

se sequence showing the germination and growth of sunflower seeds (Helianthus annuus), comparing an unfertilised seed to one grown with biologically active fertiliser. The seed at top is the control, while the lower seed was soaked in biologically active fertilizer for 12 hours. This sequence was filmed over 12 days. Rotated version of vertical clip K012/4330

光厂(VJshi)视频提供测试肥料对向日葵生长的影响，延时摄影。视频素材下载，适用于生物学，农业，谷物，科学实验，食品等主题的内容创作。

作者署名：Science Photo Library/Getty Images/华夏视觉