"Three Essentials" for Harvesting Leek in Greenhouse

Leek is a perennial herb, and the nutritional status of the rhizome is the basis for its healthy growth and sustained high yield. Reaping the leeks reasonably can improve the nutritional status of the roots and stems of the leeks and ensure the high quality and stable yield of the leeks.

Time should be right

In early spring, the optimal harvesting interval of leeks in the greenhouse is 30-40 days. At this time, the height of the leeks plant is generally 30-40 cm, the number of leaves reaches 5-7, and the maximum nutrient content in the plant is also relatively high. , The quality and yield of leeks are in the optimal state.

Harvesting too early, the overall height of the plant and the accumulation of nutrients are not sufficient, the yield is low, and the flavor is weak; the harvesting is too late, the plant is prone to lodging, the old leaves are prone to yellowing, the risk of infection and disease increases, and the taste of leeks tends to decrease.

It is advisable to use a sharp and clean sickle when harvesting. It is done in the morning or evening on a sunny day. It is best to harvest in the morning after the shed is dehumidified. It is not suitable to harvest leeks in low temperature and poor weather, because the sheds are often high humidity and low temperature in such weather, and the growth of leeks is slow and weak, and the wounds produced after harvesting are easy to be infected with diseases.

The stubble height should be moderate

The stubble height refers to the distance between the harvesting position and the upper end of the leek bulb (gourd head). The stubble height should be moderate, neither too high nor too low, 3 to 4 cm is ideal. Judging from the color of the knife edge, the section should be light yellow. If the color is green, it means that the stubble is too high, and if it is white, it means that the stubble is too low. If the stubble of leeks is too high, it will affect the yield and quality of the current leeks; if the stubble is too low, it is easy to damage the tissues of the sheath base, which will delay the harvest time of the next stubble, affect the yield of the next stubble, and reduce the total annual yield. It will lead to premature plant senescence and decreased disease resistance.

The number of harvesting should be appropriate. The number of harvesting of greenhouse leeks should be determined according to plant growth, field water and fertilizer, occurrence of diseases and insect pests, and market demand. The best harvest in winter and spring is 3 times, and the maximum should not exceed 4 times, which is conducive to enhancing plant resistance. .

Greenhouse leek should avoid watering and fertilization within one week before harvesting, and strengthen ventilation and dehumidification; after harvesting, heat preservation should be strengthened in the shed, and it is not suitable to water and fertilize before the new leaves grow to 4 to 5 cm. These measures can effectively avoid the occurrence of leek gray mold, are conducive to the healthy growth of leek, and promote stable and high yield.

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