How to grow green greenhouse cauliflower

10~15 days before planting and planting, 5,000-6,000 kg of organic fertilizer per mu, 60 kg of superphosphate, 7 kg of ash or potassium chloride. After fertilization, plow 30 cm deep, then simmer flat. When the sorghum is planted in the ditch, or when making small sorghum, apply 25~30 kg of compound fertilizer per acre, 20~25 kg of urea, and mix the soil and fertilizer thoroughly.

If you are a small sorghum, the squat is 80 cm wide, the squat is 15 cm high, and the groove is 30 cm wide. The mulch is covered on the enamel. Then planted at a line spacing of 50 cm and a plant spacing of 40 cm.

If you do a flat file, the width is 120 cm, and it is planted at a row spacing of 45 cm. The method is to make a ridge, the ridge distance is 45 cm, the ridge is covered, and then planted on the ridge at a plant spacing of 45 cm. 2400~2600 trees per acre. Watering should be done in time after planting.

After planting, the planting water should be planted when watering and planting. When the planting water is sufficient, the seedling water can be not poured, the cultivating and cultivating can be strengthened, and the root development can be promoted. Before and after flower bud differentiation and flower bulb hypertrophy period, the water requirement is large, and it is not too wet and dry.

The fertilization of green cauliflower requires a large amount of fertilizer, and the lack of fertilizer plants grows poorly, the flower ball is small, and the quality is poor. The fertilization of green cauliflower should master the principle of “forefoot, central control, and attack”. That is, early application of nitrogen fertilizer promotes growth; medium-term control is prosperous; flower ball is fertilized in the long-term growth period, and phosphorus and potassium fertilizers are added. Generally focus on topdressing three times:

The first time: When the seedling grows 10~12 pieces of true leaves (planted to live for 20~30 days), the hole is applied, 10 kg of urea is applied, 5 kg of superphosphate and potassium chloride are used.

The second time: in 17~20 true leaves, before and after flower bud differentiation, 7 kg of urea was applied in the mu, and 5 kg of superphosphate and potassium chloride were used.

The third time: 10 kg of calcium hydrogen phosphate, 5 kg of urea and potassium chloride were applied during the bud. Foliar application can also be carried out with 0.2% borax and 0.5% urea after the bud.

Temperature management should pay attention to heat preservation after cultivation and planting in winter and spring, and the temperature will be higher in the later stage of growth, pay attention to the wind and cool down. The management principle is: high temperature is required from colonization to slow seedling, heat preservation and moisturization are needed to promote slow seedling, temperature is maintained at 20 °C ~ 25 °C during the daytime, and 15 °C is maintained at night. Strengthen the ventilation after planting the seedlings, and the temperature should be lowered appropriately. Generally, it should be kept at 18 °C~22 °C during the day. Into the rosette period generally maintain 15 ° C ~ 20 ° C. The development of flower bulbs requires cooler climatic conditions, generally 15 ° C ~ 18 ° C during the day. Temperature management is mainly achieved through insulation and ventilation measures.

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