The high-temperature large arch shed has a large space, but the overall thermal insulation is different. If the planting is premature, it is likely to cause uneven overall growth, increase the difficulty of management, and should be improved. Do the following:
Don't cover the plastic film
The plastic film close to the ground will affect the permeability of the soil, causing the carbon dioxide in the soil not to come out, the oxygen to go in, and the root activity to decline, which is not conducive to the normal growth of vegetables. At the same time, it is not conducive to the reproduction of aerobic beneficial bacteria. On the contrary, the number of anaerobic harmful bacteria can increase rapidly, causing a high incidence of soil-borne diseases.
So, how to improve the soil permeability of the shed covered with plastic film?
One is to use perforations on the membrane to improve the permeability of the soil; second, after the temperature rises, remove the in-line mulch and use it as straw, rice husk, etc.
Of course, the most effective way is to use arching instead of mulching.
Pruning branches, pay attention to choose fine weather
After hanging the vine, the melon grows rapidly, and the lateral branches have strong germination ability, so it is necessary to prun the branches at any time.
When pruning and branching, pay attention to choosing fine weather, the temperature in the shed rises quickly, and the moisture in the shed can be discharged early by gradually releasing the wind.
When breaking, it is best to wait for the dew on the surface of the stems and leaves to dissipate before proceeding. Similarly, do not proceed within 1-2 days after watering, because the water content of the stalk is large at this time, and it will form a bleed after twig, which is easy to be infected with harmful bacteria.
When pruning and branching, remember to move accurately and quickly to avoid excessive wounds. Immediately after the twitching work is completed, spray a protective fungicide, such as chlorothalonil, thiophanate-methyl, etc., to protect the wound.
Strengthen rooting and leaf protection and disease prevention
Due to the continuous low-light weather in the early stage, the leaves are thin and yellow, and the root growth is weak. It is necessary to strengthen the use of functional products in management and cultivate strong seedlings by spraying up and down to improve the overall resistance of the plant. At the same time, after pruning and branching, it is necessary to spray fungicides in time to protect the wounds and avoid the infection of harmful bacteria. The agents can choose protective fungicides such as chlorothalonil and thiophanate-methyl. It should also be noted that the current high-risk seasons such as powdery mildew and vine blight should also strengthen daily disease prevention work. The powdery mildew chooses agents such as nursery plants and difenoconazole; Amine etc. are sprayed.
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