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In winter, because leeks can grow continuously in the greenhouse, vegetable farmers generally increase the harvesting frequency to obtain more yields. However, this practice may lead to weakening of the leeks, deterioration of quality, and even worsening of diseases. Reasonable harvesting of leeks can improve the nutritional status of the roots and stems of leeks, and promote the stable and healthy growth of leeks, ensuring good quality and stable yield of leeks.
Harvesting time should be suitable for
In winter, the optimal harvesting interval of greenhouse leek is 30-40 days. At this time, the height of the leek plant is generally 30-40 cm, the number of leaves is 5-7, and the content of various nutrients in the plant is also high, quality and yield. They are all in an optimal state. Harvesting is too early, the plant height and nutrient accumulation are not sufficient, the yield is low, the flavor is too light; the harvest is too late, the plant is easy to fall, the old leaves are easy to yellow, the risk of infection is increased, and the taste is also tending to decline. When a disease such as gray mold occurs in the field, if the height of the plant has exceeded 25 cm, comprehensive consideration of various factors can be carried out in advance, which is conducive to disease prevention and control and maintain the relative stability of the overall output.
When harvesting, it is advisable to use a sharp and clean trowel, which is carried out on a sunny morning or in the evening, and it is best to harvest it after immersing it in the morning shed. In the morning, the leek is rich in water, standing upright and straight. After harvesting, the leek is fresh and crisp, with rich flavor, short storage and transportation time, good yield and quality, and is conducive to sales. It is not advisable to harvest leeks in low temperature and low days, because the sheds in these weathers are often high in humidity and low temperature. The production of leeks is slow and the growth is weak. The wounds produced after harvesting are susceptible to infection.
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