Basal spinach applies 4,000 to 5,000 kilograms of organic fertilizer per acre, 25 to 30 kilograms of superphosphate, and 20 to 25 centimeters deep to the ground. Overwintering spinach chooses soil with deep soil, fertile soil, high humus content, and good fertilizer and water storage performance. It should also apply organic fertilizer more than other seasons. It can spread 5,000 kg of organic fertilizer per acre, and superphosphate 25~30. Kilograms, 20 to 25 cm deep to the ground, so that the soil is fully mixed, loose soil, promote seedlings unearthed and root development. After the top-dressing autumn spinach seedlings are unearthed and grow to 4 to 5 true leaves, top-dressing nitrogen fertilizers should be applied 2 to 3 times in stages. Applying 25-25 kg of ammonium sulfate or 10-12 kg of urea per mu along the water promotes thicker leaf growth, increases yield, and improves quality. The overwintering spinach should be fertilized in stages due to a longer growth period, which can be divided into two stages: pre-winter, overwintering, and early spring. The pre-winter growth period is about 50-60 days, with the combination of irrigation water chasing a fertilizer, and 10-15 kg of ammonium sulfate per acre. When pouring "frozen water", apply 1000~1500 kg of diluted feces water again. Overwintering does not require top dressing during the growing season. In the early spring, the growth period is 30-40 days. When the spinach leaves are green and the heart leaves begin to grow, you can pour 1 small water. After the spinach enters a vigorous growth period, fertilizer should be promptly applied, combined with watering of 10-15 kg of ammonium sulfate per acre. Supplying sufficient fertilizer and water during this period can delay whiplash, increase production, and improve quality.
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Autumn spinach basal fertilizer and top dressing points