鹼

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.