First, the variety:
The harvest of autumn cabbage in the year is generally selected from flat type, such as Meimei No.2, Chuncai, Green God, and Strong 60. As the cabbage that is delayed in winter, it is generally used in Qicao, Chuncai and other varieties.
Second, nursery:
Autumn and winter cabbages are shaded by netting or semi-protected seedlings, and are usually planted in batches from late June to late July. The sowing period for delaying harvesting in winter is generally from late July to mid-August.
Autumn and winter cabbage is planted in summer, due to the high temperature, the nursery must be carefully managed. Covered with a sunshade net after sowing to maintain soil moisture and prevent soil compaction after heavy rain. After the emergence of the seedlings, remove the sunshade net and change the ring shed in time.
About 15 days after emergence, when the seedlings have 3-4 true leaves, they should be transplanted (fake plants), and the seedlings are 10 cm square. After transplanting the seedlings for 3-4 days, you can topdress once.
Third, land preparation:
The land preparation of autumn cabbage is the same as that of summer cabbage, and the wintering delay of cabbage is the same as that of spring cabbage.
Fourth, colonization:
The autumn and winter cabbage seedling period is 35-45 days. Therefore, the planting period is generally from early August to early September when planting from late June to late July. The planting period of delaying the cabbage in winter is generally from late September to early October, and no later than October 15.
The temperature is still high when the autumn cabbage is planted, it is best to choose cloudy; and the seedlings should be soiled to reduce the root damage; immediately after planting, the root water is poured to promote the living tree.
Planting density: large flat head type, line spacing 50 cm, plant spacing 40 cm, about 2800 plants per 667 square meters; black leaf small flat head type, line spacing 43 cm, plant spacing 40 cm; April slow cabbage, line spacing 40 cm See square, 3,500-4,000 plants per 667 square meters.
V. Field management:
Strengthen the management of fertilizer and water, and promote early coverage.
Autumn cabbage is generally topdressed 3 times, respectively, one week after planting live trees, 5-10 kg of urea per 667 square meters, in the early stage of the ball and the end of the ball, each time 667 square meters of urea 10-20 kg.
Wintering cabbage should be mastered before wintering. Therefore, the number of top dressing in the early stage of the ball should not be too much, 10 kg of urea per 667 square meters. In this way, in the winter, the leaves are kept strong and not susceptible to freezing damage, and the leaf ball is not easy to rot, so as to delay the harvest. Re-apply the heart and fertilizer before and after the beginning of spring, 20-30 kg of urea per 667 square meters.
In autumn and winter, cabbage is mainly insects, mainly including cabbage caterpillar, diamondback moth, beet armyworm, and Spodoptera litura.
6. Harvesting:
Autumn and winter cabbages are generally harvested from mid-to-late October. They have been harvested from January to February of the second year; April slow cabbages are harvested from mid-March to mid-April.
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