Abstract:

In this study, Chinese cabbage was used as the test material, and 300 mg·L^-1 hydrogen-rich water was carried out with hydroponics combined with nutrient solution, and its effects on plant growth indexes, physiological mechanism and quality formation were systematically explored. The results showed that the plant height, crown width, leaf number and root length of Chinese cabbage were significantly higher than those of the control, and the fresh weight and dry weight of the above-ground part of Chinese cabbage increased by 63.59% and 47.87%, respectively, indicating that hydrogen-rich water treatment had a significant effect on the growth and biomass of Chinese cabbage. After hydrogen-rich water treatment, the net photosynthetic rate and stomatal conductance of Chinese cabbage leaves, the SPAD value and chlorophyll content of leaves were significantly increased compared with the control. Root activity increased by 102.24% compared with the control. The quality analysis showed that the soluble protein content and fiber content both increased, but the difference was not significant. The results showed that hydrogen-rich water treatment significantly increased the plant height, crown width, leaf number, root length and chlorophyll content of Chinese cabbage, promoted photosynthesis and biomass accumulation, and improved the root vigor of plants. This study provides a theoretical basis for the application of hydrogen-rich water in hydroponic vegetables.

Key words: hydrogen-rich water, Chinese cabbage, photosynthesis, growth and development, hydroponics