Grain number per spike的用法和樣例：
例句
- There is a significantly linear relation between secondary branch grain number and grain number per panicle, and they have the same changing tendency.
穗粒數與二次枝梗粒數隨品種的變化是一致的，二者有極顯著的線性相關。 - Water stress during anthesis and kernel stage effects most greatly the thousand-grain weight and the grain number per ear,yield decreases more greatly.
花粒期階段水分脅迫對千粒重及穗粒數影響最大，產量降幅更大。
