1. the ratio of the volume of oxygen given off to the volume of carbon dioxide absorbed by a plant during photosynthesis, this ratio being theoretically near 1 when the primary product of photosynthesis is a simple carbohydrate
photosynthetic ratio 例句
英汉例句
both net photosynthetic ratio and the fruit number per area of hot pepper decreased in the order of garlic stubble, asparagus lettuce stubble, wheat stubble, with significant difference.