The data presented in this paper demonstrated that the opti-mum NH4
+:NO3
−
ratio in the nutrient solution could alleviate
negative effects caused by low light intensity in a certain degree. Its
positive effects are in consequence of improving chlorophyll con-tent, GS and photosynthesis, protecting chloroplast and varying the
root architecture. The light environment experienced by plants to
vary over the year, therefore, the ratio of NH4
+:NO3
−
should be
adjusted with respect to light intensity for successfully growing of
mini Chinese cabbage