How to Ensure Full Seedling Emergence in Summer-Sown Sesame? Key Technical Points Explained

Ensuring full seedling emergence from a single sowing of summer sesame is an important measure for increasing summer sesame yields per unit area. However, during the summer sesame sowing period, temperatures are high and the weather is changeable. If drought occurs, seedlings are easily "baked to death," causing severe gaps in the stand; if heavy rain occurs, seedlings are easily "smothered to death," also causing gaps in the stand. It is recommended to use the double-layer sowing method to achieve full seedling emergence from a single sowing of summer sesame. For mechanized sowing, sow 0.7 kg per mu using a 24-row seeder, of which 12 rows sow at a deep layer with a depth of 3-4 cm, and the other 12 rows sow at a shallow layer with a depth of 0.2 cm, with two passes of compaction before and after sowing. For manual sowing, first prepare the land, apply fertilizer, and open furrows to make beds according to conventional methods. After harrowing the soil fine and leveling it, sow 0.6 kg per mu, and after harrowing to cover the seeds while taking advantage of the soil moisture (depth 2-3 cm), then sow another 0.5 kg on top, and then promptly roll and compact the soil while taking advantage of the soil moisture.

Using the double-layer sowing method can achieve the goal of double insurance. Under drought and high-temperature conditions, although the surface-layer sprouted seeds are baked to death, the deep-layer sprouted seeds can still emerge smoothly; under heavy rain and waterlogged conditions, although the deep-layer sprouted seeds are smothered to death, the surface-layer sprouted seeds can still emerge uniformly and smoothly, ensuring full seedling emergence from a single sowing and laying a good foundation for high yields of summer sesame.