Summer vegetable seedlings prevent leggy

Plant leggy is a common problem in summer vegetable nursery. Seedlings grow in the form of elongated stems, long and sparse nodes, thin leaves and light green color, soft tissue, and sparse roots. Causes of seedling growth are mainly due to lack of light and high temperature, especially at night when the temperature is too high, the temperature difference between day and night is small, and the respiratory depletion of nutrients is excessive. Excessive nitrogen fertilizer and water can easily lead to leggy seedlings. To prevent seedlings from becoming leggy, different methods should be adopted at different times. First, the sowing density should not be too large to avoid seedling crowding after emergence. Yulin fruit and vegetable seedlings generally require 2 to 3 square meters of seedbed per mu. Immediately remove the ground cover after emergence. Melon vegetables are best sown directly in the tray. The second is time and seedlings, planting and planting. After emergence and time seedlings. In the vegetable leaves 2 leaf 1 heart prosthesis, the density of the prosthesis was controlled at 120-130 strains per square meter. Solanaceous vegetables were planted at the 4th to 6th leaf stage of the vegetable seedlings, legume vegetables were planted when 2 true leaves were about to be unfolded, and the melon vegetables were planted at the 3rd leaf 1 heart stage of the vegetable seedlings. The third is to enhance ventilation and light transmission, and to control temperature and humidity. High temperature, high humidity and low light are the important reasons for summer seedlings growing. The management should be after the emergence of the seedlings, pre-planting, post-cultivation, post-planting, post-planting, ventilation and light, reduce the temperature and humidity, and control the excessive growth of the seedlings. Fourth, reasonable management of fertilizer. Strict control of moisture and fertilization within the seedbed, can not be partial nitrogen fertilizer. The fifth is to drain vegetables in time. In 20 days before the planting of solanaceous fruit and melon vegetables, the cabbage seedlings often appear overcrowding. At this time, the seedlings should be properly moved to separate the size seedlings and expand the living space of the individual plants. Sixth, it is controlled. Seedlings appear leggy, in addition to taking the above measures, but also use the control of methothenic or Chlormequat spray.

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