Causes of cracking stalks in lettuce and its control
2023-07-13 19:10:47
Lettuce stalk severely affects the quality of lettuce, and many vegetable farmers often fail to effectively prevent the slicing of the slicing stalk, resulting in serious economic decline. The causes of cracking stems and preventive measures are briefly described below for reference.
Causes of crack stem stems occur in the harvest period, the reasons are: First, related to water and fertilizer, uneven supply of water and fertilizer, sudden drought, especially when the fleshy stem mature, the skin has been lignified, at this time a lot of water, Sudden enlargement of the fleshy stem, the epidermis can not be enlarged and split; the second is uneven heat and cold; and third, in the absence of boron, the content of vitamin C in lettuce is reduced, and plant resistance to stress and disease resistance is reduced.
Preventive measures First, we must strengthen fertilizer and water management. During the meat enlargement period, the water and fertilizer are increased, the ground is slightly dry, the watering is even, the amount of water must be moderate, and flooding should be strictly prevented. When the ground energy enters, shallow loose soil is broken, combined with watering, and then top dressing 1 or 2 times, spraying poly-boron 1500 times for 1 time to prevent stem cracks from appearing. Second, timely harvest. When the top of the main stem of the lettuce stem is flat with the tip of the tallest leaf, it is suitable for harvesting. At this time, the fleshy stem has been fully expanded, the quality is crisp, and the cracked stem is not easy to appear.
Causes of crack stem stems occur in the harvest period, the reasons are: First, related to water and fertilizer, uneven supply of water and fertilizer, sudden drought, especially when the fleshy stem mature, the skin has been lignified, at this time a lot of water, Sudden enlargement of the fleshy stem, the epidermis can not be enlarged and split; the second is uneven heat and cold; and third, in the absence of boron, the content of vitamin C in lettuce is reduced, and plant resistance to stress and disease resistance is reduced.
Preventive measures First, we must strengthen fertilizer and water management. During the meat enlargement period, the water and fertilizer are increased, the ground is slightly dry, the watering is even, the amount of water must be moderate, and flooding should be strictly prevented. When the ground energy enters, shallow loose soil is broken, combined with watering, and then top dressing 1 or 2 times, spraying poly-boron 1500 times for 1 time to prevent stem cracks from appearing. Second, timely harvest. When the top of the main stem of the lettuce stem is flat with the tip of the tallest leaf, it is suitable for harvesting. At this time, the fleshy stem has been fully expanded, the quality is crisp, and the cracked stem is not easy to appear.
Ventilation is one of the most important components in a successful greenhouse.
If there is no proper ventilation, greenhouses and their growing plants can become prone to problems. The main purposes of ventilation are to regulate the temperature and humidity to the optimal level, and to ensure movement of air and thus prevent build-up of plant pathogens (such as Botrytis cinerea) that prefer still air conditions. Ventilation also ensures a supply of fresh air for photosynthesis and plant respiration, and may enable important pollinators to access the greenhouse crop.
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