Bitter gourd plug seedlings are not good

In recent years, the technique of plug seedlings has become more and more widely used in vegetables. However, some vegetable farmers have found that using seedlings to grow bitter gourd seedlings, the seedling emergence rate is greatly reduced, and 50 seedlings in the 50-hole seedlings can produce up to 40 seedlings. The rate is less than 80%, and bitter gourd seedlings are planted directly in the shed, and the emergence rate is close to 100%. Why is this? This is because bitter gourd has a relatively long seedling period. If seedlings are cultivated with plugs, the management of moisture and temperature is difficult, but it is not good. First of all, the tray matrix moisture changes rapidly. Bitter gourd needs higher humidity to germinate. It uses seedlings to grow seedlings. Although the permeability of the substrate is strong, the water retention is weak, and it takes a short time to dry. It takes one day to pour water once, and the humidity changes greatly. Sometimes, the growers forget to water, leading to watering. The matrix is ​​dry and damp, and it is not good for the bitter gourd to germinate. In the shed, although the seedlings grow for a long time, due to the strong water-holding capacity of the soil, the humidity does not change so much that the germination is not affected. Second, the temperature in the plug changes dramatically. After the greenhouse was replaced with a new film, the light transmittance was strong, and the temperature in the shed was high at noon. In order to reduce the evaporation of water and maintain the humidity, the seedlings are often covered with mulching film, which leads to high temperatures in the plug tray during the day, which may affect the seedling emergence. If the membrane is forgotten to be removed, the seed may even be “steamed” and the seedling emergence rate will be reduced. . Therefore, for the bitter gourd, wax gourd and other seedlings difficult to emerge, long time the emergence of vegetables, not suitable for the use of plug seedlings, or the traditional nutrition seedlings is better.

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