Detailed Explanation of Key Techniques for Growing Cabbage in Greenhouses

First treat disease-resistant, early-heading seeds with warm water or chemicals, then sow them in nutrient pots. Transplant in a timely manner after seedlings emerge. When transplanting, apply fertilizer and form ridges, and add a small arch tunnel inside the greenhouse. Finally, just carry out watering, fertilizing, and pest and disease control.

Fertilization Methods for Greenhouse Cabbage:

1. Apply sufficient organic fertilizer

Applying sufficient base fertilizer is the foundation for a bumper harvest of Chinese cabbage. Generally, old vegetable plots have relatively high soil fertility, so organic fertilizer should be applied in an appropriate amount; while new vegetable plots have low soil fertility, so it is especially important to apply a heavy dose of organic fertilizer mixed with phosphate fertilizer as base fertilizer.

2. Skillfully apply seedling-promoting fertilizer

After the cotyledons of Chinese cabbage emerge, the main root has reached about 10 cm; and primary lateral roots have developed, giving it the ability to absorb water and nutrients. When base fertilizer is insufficient or no seed fertilizer was applied, apply a small amount of seedling-promoting fertilizer, 5-7 kg of urea per mu, to promote growth. When fertilizing, focus on applying extra fertilizer to small and weak seedlings to help them form strong seedlings.

3. Rational topdressing

Generally, the two topdressings should be seized when the seedlings begin to enter the rosette stage after the plant-to-plant stage and before they begin to head. These are the key to ensuring a high yield of Chinese cabbage. At this time, Chinese cabbage is in a period of rapid growth, so the amount of topdressing should be increased, mainly nitrogen fertilizer, with nitrogen fertilizer combined with phosphate and potassium fertilizer, or regular application of diluted manure. Spraying the leaves during the growing period with Kezi 891 plant growth promoter (titanium citrate aqueous solution) diluted 1000 times, or a mixture of 0.5%-1% urea and monopotassium phosphate, can both increase the net vegetable rate of Chinese cabbage and enhance its commercial value.

4. Pay attention to applying potassium fertilizer

Increasing potassium fertilizer can enhance the disease resistance and storage tolerance of Chinese cabbage, but the application of potassium fertilizer is often neglected in production. Generally, the potassium application rate is 20 kg of potassium sulfate or 15 kg of potassium chloride. When potassium fertilizer is lacking, some plant ash can be applied.

The above is all the content from the Tuliu.com editor about growing cabbage in greenhouses. You can use it as a reference to learn about it.