酸鹼值

某些繡球花的顏色取決於土壤的酸鹼值：土壤酸性越強，花朵顏色越藍。

mǒuxiē xiùqiúhuā de yánsè qǔjuéyú tǔrǎng de suānjiǎnzhí tǔrǎng suānxìng yuè qiáng huāduǒ yánsè yuè lán

The colour of some hydrangeas is determined by the pH value of the soil: the more acidic it is, the bluer the flowers are.