The selection of good varieties of summer Chinese cabbage should be selected varieties with high disease resistance, heat resistance and high yield. For example, Yuyuan 50, Yuzao No. 1, Jinxia No. 3, Wangyan Heat Resistant King and so on.
Soil preparation fertilizes the land with no water and irrigated soil. If the water quality is not good, water must be poured 5 to 7 days before the wheat harvest. Immediately after the wheat is harvested, it should be ridged by something, ridge height is 15cm, ridge distance is 60cm, ridge roof is flat, and all wheat roots are picked out so that Tillage. Combined with ridging, each 667m2 Sanyuan compound fertilizer 100kg, soil miscellaneous fertilizer 4000kg, ammonium bicarbonate 80kg.
Appropriate planting of suitable close plants. The main factors affecting the cultivation efficiency of summer cabbage are temperature and market demand. It is necessary to ensure the normal growth of cabbage, but also to avoid the harvest period of spring and early autumn Chinese cabbage. It is generally sown in late June to late July. South China can be appropriately advanced according to the local climatic conditions, and the north should be appropriately delayed. Summer cabbage varieties have the characteristics of early maturity, short growing period and small plant type, and reasonable close planting is the basic condition for high yield. The suitable density is 23500 ~ 4000 strains per 667m.
Field management is hot and rainy in summer. Do not over water to prevent illness. However, it is necessary to dry the ground and keep the ground moist so as not to burn the seedlings. In order to ensure that the cabbage grows well, shading measures must be used. That is, every 3 ~ 4 m cabbage ridge corn, 2 rows of corn per ridge, corn selection of high culm varieties. When the Chinese cabbages emerged and when they were seedlings, they had 3 to 4 seedlings per hole, 4 to 5 leaves, 1 seedling, 1 to 2 seedlings per hole, and 2 seedlings per seedling. The sowing can be planted according to the row spacing during the seedling period. The summer cabbage must not be seedlings, and should be promoted mainly. The initial stage of watering the ball is to fertilize the soil with potassium fertilizer.
Pest control pests are mainly cabbage caterpillars and aphids. Diseases mainly include sclerotinia, soft rot and downy mildew.
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