To ensure optimal growth for late-sown buckwheat, it's crucial to apply sufficient base fertilizer to prevent nutrient depletion and support healthy planting. Once the soil is properly prepared, it's recommended to reapply basic fertilizers, with 3 to 5 cubic meters of high-quality farmyard manure applied per acre. Throughout the growing season, nitrogen should be supplied in accordance with the expected yield. Two-thirds of the total phosphorus and potassium fertilizers, along with farmyard manure, should be mixed and spread evenly across the field to provide balanced nutrition.
When selecting varieties for late sowing, it's advisable to choose semi-winter types that are well-suited to delayed planting. The exact number of days for late sowing should be determined based on local autumn temperatures. As a general guideline, increasing the seeding rate by 0.5 kg per day of delay can help maintain yield potential. However, it's important not to overdo it, as excessive seeding may lead to wasted seeds and later issues like overcrowding and lodging.
Applying pre-winter farmyard manure helps slow down the emergence of young wheat plants during winter, resulting in weaker seedlings that are more susceptible to frost damage. To protect the crop, it's recommended to cover 2 to 3 cubic meters of farmyard manure per acre. This practice not only safeguards the seedlings but also provides essential nutrients before winter. Combining this with activities like cultivating and tilling can further enhance nutrient availability and promote strong root development.
In early spring, managing irrigation is key to warming up the soil and delaying the application of green water. Since late-sown buckwheat often accumulates insufficient heat before winter, the focus in early spring should be on warming the ground and preventing temperature drops. Delaying the watering until after the risk of frost has passed is essential. Key practices include rolling the fields, alternating shallow and deep cultivation, encouraging early green-up, preserving pre-winter pods, and ensuring a good number of grains per panicle. These steps help maximize yield potential and improve overall crop resilience.
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