The results showed that the net photosynthetic rates of the trifolium L under full light were higher than those under light shaded conditions.

• 结果表明：白车轴草在全日照条件下净光合速率显著高于全遮荫条件，且净光合速率、蒸腾速率日变化均为双峰曲线，午休现象是由于气孔因素引起。