Grasp the "three tubes" after planting zucchini in spring

The 20-25 days from planting to root melon harvest is the early stage of melon fruiting. The key points of management are heat preservation, water control, mid-tillage, root promotion and seedling protection. After setting the value to 5-7 days before the slow seedling, the herbs should be covered in the morning and evening to keep the greenhouse at 25 ℃ ~ 30 ℃ in the daytime, 15 ℃ ~ 18 ℃ at night, and the ground temperature 20 ℃ ~ 25 ℃. The temperature decreased properly after slow seedling, 22 ℃ ~ 25 ℃ in daytime and 15 ℃ at night. Generally, a small amount of slow seedling water should be opened 2-3 days after planting, and then the soil should be ploughed and loosened once in 3-4 days for 4 times in a row, which can preserve soil moisture, increase soil temperature and promote root growth. Let out the wind when the greenhouse temperature exceeds 30 ℃ during the day, and release the bottom wind when the outside temperature reaches more than 20 ℃. When the root melon begins to expand, it should be watered once, and the soil should be loosened after watering. The extra male flowers that bloom in the early stage can be removed to avoid wasting nutrients. When the female flowers bloom, they can be stained with 20~30ppm 's 2meme4murD and pollinated artificially (pollination time is before 9 a.m.) to protect flowers and fruits. Generally speaking, dwarf seedling varieties can only grow 2-3 vines per plant, but there is no need to branch. The first claw should be harvested early (about 250 grams can be picked). The peak period of root melon is about 40-50 days after harvest to the 4th and 5th melon. The focus of this issue is to strengthen fertilizer and water management, prevent high temperature, control seedlings and promote melon. When the lowest temperature of the outside at night is more than 15 ℃, there will be a strong wind around the greenhouse, so that the temperature inside the greenhouse will reach 25 ℃ ~ 28 ℃ during the day, 15 ℃ ~ 20 ℃ at night, and the ground temperature 18 ℃ ~ 22 ℃. Watering once every 5-7 days, pay attention to watering should be carried out two days before each picking, not within 3 days after picking, in order to achieve the purpose of controlling seedling and promoting melon. If the fertilizer is applied once every other time, the potassium sulfate compound fertilizer can be applied 1520kg per mu, and the flowers can be stained with 2mem4murD and pollinated artificially. If the growth of each plant is too dense after 3 melons are harvested, it can be pulled out properly, and one line can be removed if necessary. In the later stage of melon setting, each zucchini harvested 4 to 5 melons and entered the later stage of melon fruiting. In this period, the melon seedlings were weak and no longer carried out special management. The old leaves could be removed, proper fertilizer and water management could be carried out, and the sitting melons and fruits could be maintained and harvested after maturity.