Tea

Treatment: Two treatments were set up in the experiment, namely CK (inorganic compound fertilizer 10g/plant/time) and HA (10g/plant/time). Before fertilization, Al³⁺ stress was applied to each target. Afterwards, fertilization and irrigation were carried out weekly, while other operations followed conventional practices.

Figure 24. Growth conditions of tea plants under Al3+ stress for each treatment

Result: Compared with the control, tea plants treated with humic acid exhibited vigorous above-ground growth, less leaf yellowing, and robust roots.