There is a saying that the seedlings make 30% harvest. Therefore, cultivating strong seedlings is the basis for high and stable yields. However, in the actual operation process, the phenomenon of uneven emergence is often encountered, which causes certain troubles in management. The reasons for this phenomenon are introduced as follows:
1. The seed quality is low. Inconsistent seed maturity, mixed old and new seeds, etc., can cause irregular emergence. Uneven emergence of seedlings is caused by the quality of seeds, which generally manifests as sparse growth of seedlings on the seedling bed.
2. Improper seed treatment. Insufficient water absorption before germination of seeds, or unsuitable conditions such as moisture, temperature, and oxygen during germination, cause uneven germination and uneven emergence after sowing.
3. Poor sowing technology and seedbed management technology are the main reasons for uneven emergence. Uneven seeding, uneven seeding bed surface, different cover soil thickness after sowing, and different environmental factors in the seedbed will cause uneven seedling emergence. Generally, the emergence of seedlings is late in some areas of the seedbed and normal in other areas.
4. Unearthed with a hat. After the seed germinates, the seedling fails to leave the seed coat in the soil, and the seedling pushes the seed coat out of the soil. The seed coat is tightly attached to the cotyledons, which prevents the cotyledons from developing in time, which affects the photosynthesis of the seedlings and is very unfavorable to the growth of the seedlings.
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