Management of cabbage after colonization in small arch shed

In the central and southern part of Hebei Province, early-maturing cabbage is cultivated in a small arch shed in early spring. generally, the strong seedlings are transplanted into the small arch shed in the first and middle of February, and the mature harvest can be achieved in the first and middle of May, which can not only fill the gap in the vegetable market in early summer. And it does not affect the growth of summer crops and effectively increase farmers' income. The main points of management after colonization are introduced as follows:

I. transplanting at the right time

In the first and middle of February, it can be planted when the ground temperature of 10 cm in the greenhouse is more than 5 ℃ and the air temperature is more than 8 ℃. It is selected to plant the strong seedlings cultivated in advance into the middle of the ridge when there are 3-5 days of sunny and high temperature in a row, and the appropriate depth is not to bury the five-branch strands, with a row spacing of 40 cm and an average of 3500000 seedlings per mu. After planting, slow seedling water is poured along the ridge and furrow. In order to prevent too low water temperature and too much watering, resulting in too low temperature in the greenhouse and ground cracks, resulting in the death of seedlings, deep well water should be irrigated, and most of the ditch water should be irrigated. After watering the slow seedling water, close the greenhouse film for 15 days, slow the seedling and squat the seedling.

II. Field management

1. Water and fertilizer management. 15-20 days after planting, according to soil moisture and seedling growth, water was irrigated once along the ridge and furrow, and 15 kg urea per mu was applied to promote the rapid growth of the plant. After the ground is slightly dry, one-time ploughing and weeding is carried out at a depth of 3cm to 4cm to promote soil ventilation. Enter the heading period, combined with watering, apply 20 kg of low-nitrogen, high-phosphorus and high-potassium compound fertilizer per mu, and then pour small water every 7-10 days to keep the soil dry and wet. Stop watering 5-7 days before harvest to avoid cracking balls and causing losses.

two。 Temperature management. Within 15-20 days after cabbage planting, seal the greenhouse film and do not need ventilation. After the second watering, the shed should be opened at noon on a sunny day according to the weather conditions and seedling growth, and the appropriate ventilation should be carried out to keep the temperature in the shed below 25 ℃, so as to prevent the growth of outer leaves caused by high temperature and delay pilling. Seal the shed entrance at night to keep the temperature above 10 ℃. In the heading period, with the increase of external air temperature, the ventilation area and ventilation time are gradually increased, so that the maximum temperature in the shed is controlled at about 23 ℃.

III. Timely harvest

From late April to early and mid-May, when the leaf ball is held tight and the single ball weight reaches the variety characteristics, it will be harvested and listed in batches according to the market situation.

Qiu County Dongshun Agricultural Technology Co., Ltd. Zhou Dong