Fertilization Tips for Chinese Cabbage: Scientific Fertilizer Use Promotes Tight Heads

Chinese cabbage is a common leafy vegetable with a long growing period and a high fertilizer demand. Whether fertilization is done properly directly affects the yield and the quality of the heads. When growing Chinese cabbage, organic fertilizer should be the main input and chemical fertilizer a supplement, so that the base fertilizer is adequate and the topdressing is skillfully applied, and only then can the plants grow steadily.

The base fertilizer is generally applied when preparing the soil, mainly with fully decomposed farmyard manure or commercial organic fertilizer, combined with an appropriate amount of phosphorus and potassium fertilizer and mixed into the soil by deep plowing, to lay a foundation for later growth. In plots with insufficient base fertilizer, the seedlings tend to grow weakly and their disease resistance declines accordingly.

Topdressing should seize several key periods. During the seedling stage and rosette stage, nitrogen fertilizer should dominate to promote leaf growth and form a robust rosette; after entering the heading stage, the fertilizer demand is greatest, so the proportion of potassium fertilizer should be appropriately increased and nitrogen and potassium applied together, which is favorable for tight heads and improved quality. After each topdressing, watering should be combined with it to speed up nutrient uptake and avoid root burn.

Several points also need attention when fertilizing: organic fertilizer must be fully decomposed, as undecomposed fertilizer easily carries pathogens and causes root burn; the concentration of topdressing should not be too high, and it is better to apply thin fertilizer frequently and in small amounts several times; near the harvest period, the amount of nitrogen fertilizer should be reduced, and the safety interval should be observed, so that Chinese cabbage is both high-yielding and safe to eat.