Compared with continuous flooding, intermittent irrigation improves leaf photosynthetic rate, decreases leaf transpiration rate and increases leaf area index, thus water use efficiency of rice.

• 与淹水灌溉相比，间歇灌溉的叶片光合速率高，叶面积指数大，叶片蒸腾速率较低，提高了水分利用率；