In the early growth stage of transplanted rapeseed seedlings, it's common to observe symptoms such as red or yellowing leaves, curled leaf tips, slow or halted growth, and overall poor development. These issues can lead to plant death if not properly managed. So, how can you prevent your rape seedlings from dying? Here are some effective strategies to help your crops thrive.
One major cause of stunted growth is drought or waterlogging. When the soil becomes too dry or saturated, plants struggle to absorb water, leading to discoloration and wilting—especially during midday sun. If the soil surface is cracked and hardened, it’s a sign of severe dehydration. To combat this, consider no-till transplanting and use furrow irrigation by filling the ditch to about two-thirds of its depth, allowing water to seep into the soil. After transplanting, applying a new high-fat film spray at 600 times dilution helps retain moisture, reduce evaporation, and protect against pests and diseases. This also helps the seedlings adapt more quickly to their new environment and grow healthier.
For waterlogged conditions, it’s essential to improve drainage by deepening or clearing ditches to lower the water table. Combine this with soil cultivation and apply ash or well-decomposed organic fertilizer to warm up the soil and promote better root development.
Soil compaction is another issue that can hinder root growth. Regular cultivation and using a high-fat film spray (diluted 600 times) can help protect against water loss, sun exposure, and temperature extremes. It also prevents soil crusting and reduces pest infestations.
Nutrient deficiency can also lead to weak, unhealthy seedlings. If the plants are short, with narrow, yellow-green leaves, it may indicate a lack of nitrogen. Apply quick-acting nitrogen fertilizer promptly. If upper leaves are dark green while lower ones turn purple-red, and roots are stunted, this suggests phosphorus deficiency. A foliar spray of 0.3% potassium dihydrogen phosphate solution, applied 2–3 times every 3–5 days, can help. Boron deficiency may cause slow growth, root damage, and purple leaves. In this case, spraying a mixture of new high-fat film and 0.1% borax solution (30–40 kg per acre) can be beneficial.
Pests and diseases can also cause seedling death. Viral infections often start with small, stunted plants. To manage aphid infestations, use a combination of new high-fat film and 100% sputum spray. For viral disease symptoms, apply new high-fat film mixed with 5% bactericidal clear at 300–400 times dilution to control the spread effectively.
By addressing these key factors—water management, soil health, nutrition, and pest control—you can significantly improve the survival and growth of your rapeseed seedlings. With proper care, your crop will develop strong, healthy plants ready for a successful harvest.
Suzhou FUJI Precision Elevator Co.,Ltd , https://www.profuji.com