Site preparation for planting 10 to 15 days before planting and planting, per acre Shi organic fertilizer 5000 ~ 6000 kg, superphosphate 50 kg, plant ash or potassium chloride 7 kg. Deep plowing 30 cm after fertilization, and then flatten it. When the flat ridge is planted in a trench, or when it is used as a small sorghum, 25-30 kg of compound fertilizer and 20-25 kg of urea are applied per acre, and the soil fertilizer is thoroughly mixed.
If you make a small sorghum, you should have a width of 80 cm, a height of 15 cm, and a width of 30 cm. Then planted by row spacing 50 cm, plant spacing 40 cm.
If it is flat, it is 120 centimeters wide and it is planted at a spacing of 45 centimeters. The method is to make a ridge, the ridge distance is 45 centimeters, the ridge is laid on the membrane, and then the ridge is planted at a spacing of 45 centimeters. Plant 2400~2600 trees per acre. Water immediately after planting.
After the planting, the management will be planted with water when the watering is planted, when the planting water is sufficient, the seedlings will not be poured, the cultivator will be used for the cultivation, and the development of the root system will be promoted. Before and after flower bud differentiation and flower bulb hypertrophy require large amounts of water, avoid excessive dryness.
The fertilization of green broccoli requires a large amount of fertilizer, poor growth of poorly-fertilized plants, small curdballs, and poor quality. The fertilization of green cauliflower should master the principles of “forefoot, central control, and post-attackâ€. That is, early application of nitrogen fertilizer promotes growth; medium-term control is prosperous; flower bulbs are re-fertilized during the growth period, and phosphorus and potash fertilizers are added. General focus dressing three times:
The first time: seedlings grow 10 to 12 true leaves (20 to 30 days of planting and survival), acupuncture, Mushi urea 10 kilograms, superphosphate, potassium chloride 5 kilograms each.
The second time: In 17 to 20 true leaves, before and after flower bud differentiation, Mushi 7 kg urea, superphosphate, potassium chloride 5 kg each.
The third time: 10 kg of calcium hydrogen phosphate was applied during budding, and 5 kg of urea and potassium chloride were applied. After budding, foliar spraying with 0.2% borax and 0.5% urea is also available.
Temperature management Winter and spring sorghum cultivation should pay attention to after the planting, warmer late in the growing season, pay attention to air temperature. The management principle is: from the time of planting until the seedlings require a relatively high temperature, heat preservation and moisturizing, and promotion of seedling sowing, keep the temperature between 20°C~25°C during the day and 15°C during the night. Ventilation is strengthened after planting seedlings, and the temperature is appropriately lowered. Generally, it is maintained at 18°C~22°C during the daytime. Into the rosette period is generally maintained at 15 °C ~ 20 °C. Formation of flower bulbs requires relatively cool climatic conditions during the development period, which is generally maintained at 15°C to 18°C ​​during the day. Temperature management is mainly achieved through insulation and ventilation measures.
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