Soybean seedling stage management tips: get these points right for uniform and strong seedlings

To achieve high yields in soybeans, good planting is the foundation and management is the key, especially seedling stage management, which is the most important factor in determining yield. The goal of seedling stage management is uniform and strong seedlings. So how should soybeans be managed during the seedling stage? Let's take a look together.

1. Check seedlings and replant

After soybeans emerge, seedlings should be checked and replanted immediately. When missing seedlings are found, seeds of the same variety should be soaked and replanted in time, or seedlings can be transplanted with soil during thinning. For gaps in rows over 30 cm, replanting or transplanting should be done, while for gaps under 30 cm, double plants can be left at both ends of the gap instead of replanting.

2. Thinning and final singling

When the soybean cotyledons unfold, start thinning; final singling is carried out when the first compound leaf appears. The retained plant density depends on soil fertility and variety. For dibbling, leave 2 plants per hole; for drilling with 40 cm row spacing, if the planned density is 25,000 plants, leave 15 plants per meter; for 15,000 plants, leave 9 plants per meter; for 35,000 plants, leave 24 plants per meter.

3. Scientific topdressing

Improper fertilization of soybeans can cause excessive vegetative growth and lodging of seedlings, reducing later yield. Therefore, the principle of topdressing at the seedling stage is to apply phosphorus and potassium fertilizer early and appropriate nitrogen fertilizer later. Generally, after final singling, apply 10 kg per mu of compound fertilizer with 45% content; at the pod-setting stage, apply 5 kg per mu of urea; when seedlings are growing too vigorously, the first topdressing can be reduced or omitted.

4. Pest and disease control

The pod-setting stage of spring soybeans occurs in hot and rainy weather, making soybean purple seed stain and downy mildew very likely. To control them, use 85% metalaxyl or DuPont Kocide 100 g, add 50 kg of water, and spray on the leaves. Main insect pests include aphids, red spider mites, and bean stem maggots, which can be controlled by spraying 40% omethoate or phoxim 50 mL, add about 40 kg of water.

5. Drought resistance and drainage

During the soybean seedling stage, attention should be paid to water management. Lack of water will seriously affect its growth and may even cause death from water shortage. However, the seedling stage is also a rainy season, making waterlogging from accumulated water very likely. Therefore, during the seedling stage, waterlogging damage should also be prevented to avoid root rot and large-scale plant death.

  The above is an introduction to soybean seedling stage management tips. We hope it helps you. If you want to learn more related knowledge, please stay tuned to us.