How to plant Chinese cabbage in spring
First, select improved varieties
When planting Chinese cabbage in spring, we should choose varieties with strong winterness, late bolting, cold tolerance and high yield.
Second, cultivate strong seedlings
If the seeds of Chinese cabbage are exposed to low temperature after germination in spring, they will bolting early through vernalization stage, resulting in production losses. If the temperature is low during seedling raising, the small arch shed covered with plastic film can be used for seedling raising, which plays a role in cold protection and heat preservation and is beneficial to seedling growth.
Third, apply sufficient base fertilizer
There are more rainy days during the growth of Chinese cabbage in spring, which is not conducive to the growth of Chinese cabbage. Therefore, the cultivation gang suggested that sandy loam with good drainage should be selected. After the previous crops were harvested, the soil should be turned over and sunned in time, and decomposed pig cow dung 1000 ~1500 kg and compound fertilizer10 kg should be applied as base fertilizer per mu. After soil preparation, build a high ridge to facilitate drainage. Generally, the width of the border is1.2 ~1.5 m, and the width of the ditch is 20 ~ 30 cm and the depth is about 30 cm. Strong seedlings should be planted when planting, so that the growth after planting is neat and consistent.
Fourth, strengthen management
If the temperature is low when planting Chinese cabbage in spring, it can be covered with plastic film and cultivated in a small arch shed, and the temperature can be kept at about 20℃ during the day to promote the rapid recovery of plant growth. Dismantle the shed after the temperature warms up and stabilizes. Chinese cabbage has shallow roots, weak absorption capacity and strict requirements for fertilizer and water. During the whole growth period, nitrogen fertilizer should be applied repeatedly, thin fertilizer should be applied frequently to reduce nutrient loss, and topdressing should be stopped 8 ~10 days before harvesting.
Five, pest control
In spring, the pests and diseases of Chinese cabbage are generally light, sometimes there are aphids, and later there are Plutella xylostella, soft rot and downy mildew. Insect pests can be controlled by spraying BT emulsion or imidacloprid at the initial stage of damage. 72% Dubangkelu or 75% Dakoning wettable powder was used to control downy mildew, and Nongkang 120 was used to control soft rot.