Effects of ammonium:nitrate ratios on growth and antioxidant enzyme activities of Chinese cabbage seedling under low light intensity

Small type of Chinese cabbage [Brassica pekinensis (Lour.) Olsson] was used as material. The hydroponic experiment was conducted to study effects of ammonium : nitrate ratios (0 : 10, 10 : 90, 15 : 85 and 25 : 75; total nitrogen concentration 5 mmol ...