Skillful management of broccoli before and after planting

Before planting, apply high-quality farm manure per mu, 10 kg ammonium nitrate mixed ploughing, rake fine leveling, ridging with 70 cm wide and 50 cm wide and narrow rows, that is, ridge width 70 cm, groove width 50 cm, ridge surface covered with 90 cm plastic film, plant spacing 40 cm, 2750 seedlings per mu.

After planting, fertilizer and water attack simultaneously, mainly promoting, and the temperature is kept at 8 ℃ ~ 24 ℃. Spraying 600ml / 800x solution of new high lipid film can effectively prevent aboveground water from evaporation, seedling water from transpiration, isolation of diseases and insect pests, shorten slow seedling period, quickly adapt to the new environment and grow healthily. About 10 days, 15 kg of ammonium nitrate was topdressing with watering, 6 kg of ammonium nitrate was applied before the appearance of the top cord, the temperature after the bulb was kept at 15 ℃ ~ 18 ℃, less than 8 ℃, the bulb grew slowly, more than 24 ℃, the corm was loose, and the temperature of the whole plant growth period should not exceed 32 ℃.