The dry seedling technique for rice cultivation without seedbeds is a modern, simplified method that utilizes a specialized slow-release, high-absorbency seed coating agent called “Dry-Nanny.†This innovative approach involves coating rice seeds with the agent and then planting them directly in the field after a dry seedling stage. The process is efficient, cost-effective, and suitable for small-scale or large-scale farming. Here’s a detailed guide on how to implement this technique:
First, select the right variety. When using the “Dry-Nanny†coating, it’s important to choose a suitable rice variety that works well with this method.
Second, determine the correct dosage. For every 350-gram bag of “Dry-Nanny,†you should coat between 1 to 1.5 kilograms of rice seeds. This ensures even coverage and optimal absorption.
Third, soak the seeds. Before coating, rice seeds should be soaked in clean water for 12 to 24 hours. The soaking time may vary depending on the temperature—longer at lower temperatures and shorter at higher temperatures.
Fourth, apply the coating. After soaking, drain the seeds until they are no longer dripping. Then mix the coated seeds with the “Dry-Nanny†agent in a ratio of 1:1.5 (seed to coating agent) to ensure full coverage.
Fifth, prepare a good nursery site. Choose a fertile, weed-free loam or mud field. Apply sufficient base fertilizer and prepare the land properly to ensure healthy seedling growth.
Sixth, water the seedbed thoroughly. Before sowing, pour enough water into the seedbed so that the soil moisture reaches up to 10 cm deep, ensuring the bed is fully saturated.
Seventh, sow the seeds evenly and cover them lightly. Once the seeds are coated, spread them uniformly and cover them with a thin layer of fine soil about 2 to 3 cm thick.
Eighth, apply herbicides. Use a special drought-resistant herbicide, such as a grass inhibitor, to control weeds effectively in the dry seedling stage.
Ninth, water the seedlings after sowing. On the first afternoon after planting, water the seedlings again to help form a moist soil ball around the roots, making it easier to transplant later. Usually, one or two seedlings are transplanted per hill.
Tenth, manage the field similarly to traditional transplanting methods. Practices such as pest control, disease management, and irrigation should follow standard procedures used in conventional plastic tray transplantation.
Eleventh, use appropriate seed quantities. For hybrid rice varieties like Datian Mu, use about 1.5 kg per mu, while for Putian and Datian, maintain a ratio of 1:12–15.
Twelfth, decide whether to cover the seedlings with a film based on the temperature. In colder conditions, covering the seedlings with a plastic sheet can help retain heat and moisture.
Thirteenth, avoid watering for the first two days after transplanting. This allows the seedlings to establish their root systems more effectively.
This technique not only reduces labor but also improves seedling survival rates and overall crop yield. It is especially beneficial in areas where traditional seedbeds are difficult to maintain. With proper care and attention, this method can significantly enhance rice production efficiency.
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