In the winter and spring vegetables growing process, abnormal seedlings often appear due to weather changes, improper management, and other reasons.
Root seedlings
The humidity of the seedbed is high and the temperature is low.
Control measures: First, choose a soil with strong permeability to seedbed; Second, control the watering; Third, once the roots occur, we must promptly ventilate and discharge moisture. We can also apply fine dry soil and ash to dampness.
Frozen seedlings
Caused by the seedbed temperature is too low.
Prevention measures: First, improve the means of raising seedlings, using small arch shelters, etc.; second is to strengthen the night insulation measures before the onset of the cold current, such as thick straw mats, covered with small arches, etc., and try to keep dry to prevent rain and snow, necessary Take warming measures such as raw fire, etc.; third is to properly control watering, increase phosphorus fertilizer reasonably, and improve the cold resistance of seedlings.
Wilt
It was caused by the continuous release of film after the sudden rainy weather suddenly turned fine.
Prevention and control measures: First, after a sudden cloudy day, the seedlings should gradually see the light. Do not immediately uncover all the coverings. Remove them in batches and gradually increase the light. Second, remove the seedlings and wilts shortly after uncovering the film. , Immediately cover the membrane, remove the membrane after the seedlings return to normal, and avoid watering the wilt seedlings.
Shell seedlings
The seedbed was too dry and the soil was too thin.
Prevention and control measures: First, the bottom water of the seedbed should be sufficient; Second, the thickness of the cover soil should be uniform and appropriate, such as the thickness of the cover soil for cultivating peppers and eggplants is 1 cm, and the thickness of the cover soil for cultivation of cucumbers is 1.5 cm; third, the front bed of the seedling after sowing Should cover the film, keep the soil moist; Fourth, when the shell appears seedlings can be sprayed first, until the species shell moisture and then gently brush the shell away.
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