Chinese cabbage
1。 seeding time
Early-maturing varieties are generally sown before mid-August, middle-maturing varieties are generally sown in late August, and some late-maturing varieties are even sown in early September. Late-maturing varieties are suitable for sowing in late August and early September.
2。 Key points of cutting at seedling stage
The emergence time of Chinese cabbage is 3-4 days after sowing. It can be seen that the germination time of Chinese cabbage is on the ground When Chinese cabbage has 2-3 true leaves, the first thinning can be carried out. Sparse 5-6 leaves for the second time, and 7-8 leaves can be thinned.
3。 Soil preparation and fertilization
Combined with cultivated land, apply sufficient base fertilizer in the field. It is advisable to prepare the soil in time, plow evenly, rake carefully and plough deeply for about 30 cm. In addition to organic fertilizer as base fertilizer, it can also be mixed with chemical fertilizer as base fertilizer. It is suggested to use the water-soluble fertilizer of sea silkworm, which is completely soluble in water and will not cause fertilizer damage even if it is used for a long time. Generally, flat or high-edge planting is adopted in the north, and high-edge planting is adopted in the south.
4。 Tiantuan management
After the emergence of Chinese cabbage, it is necessary to check the seedling situation in time to make up for the deficiency and carry out it as soon as possible; Three days after the emergence of seedlings, the seedlings can be thinned once, and when there are 3 to 4 real leaves, the seedlings can be thinned twice to prevent the seedlings from growing too fast. After the four leaves are combined, seedlings should be fixed in time to maintain strong seedlings. Pay attention to watering at the seedling stage, don't dry it, and at the same time carry out intertillage and pine trees to achieve strong seedlings. In order to obtain the best yield, nutrients must be supplemented at different growth stages. Generally speaking, the effect of applying available nitrogen fertilizer in the early growth stage and heading stage is better.