Sowing techniques of Chinese cabbage in wheat stubble field in Xinjiang

After the winter wheat is harvested, Chinese cabbage can be sown again, and 667 square meters can be harvested 12.6 tons. The high-yield experience is introduced as follows:

First, preparation before broadcasting

1. Tengdi

When the winter wheat is ripe, it should be harvested in time, and at the same time, the wheat straw and decomposed organic fertilizer should be dragged to the ground, so that the wheat harvest is completed and the wheat straw and organic fertilizer are also towed away.

2. Apply sufficient base fertilizer

667 square meters of artificial assault 8 ~ 9 tons of organic fertilizer, and then use heavy disc harrow to cut the land twice. Before deep ploughing, topdressing urea 15 kg with 24 rows of topdressing machines, and increasing the calcium superphosphate 15 kg to a depth of 4 ~ 5 cm.

3. Seed treatment

Seed dressing with 0.3% ~ 0.4% metalaxyl and 65,438+0% water before sowing can prevent downy mildew and blight after drying.

Second, sow in time and strive for a whole seedling.

Chinese cabbage has strict requirements on sowing date, and the sowing date should be strictly determined according to the experience over the years and the weather forecast and pest forecast during the growth period of Chinese cabbage. The suitable sowing date in this area is July 15 ~ 23. Sowing adopts mechanical and manual drilling, with row spacing of 60 cm and sowing depth of 1 ~ 1.5 cm. Mechanical furrow drilling, planting150 ~ 200g per 667m2, adding fine sand before sowing, and the ratio of seed to sand is 1: 4. Manual drilling, covering 1 ~ 1.5cm, with 200 ~ 250g seeds per 667m2. Irrigation twice to ensure the whole seedling.

Three, the implementation of target management, to seize the high yield of Chinese cabbage.

1. Seedling stage

From emergence to the formation of the first leaf ball, the management goal is "full seedling, full seedling and strong seedling". At this stage, it is necessary to do a good job in seedling management, and apply urea at the rate of 8 ~ 10 kg per 667 square meters to make the seedlings grow neatly. The interval is divided into 2 ~ 3 times, and the first time is after all the seedlings are together; When there are 2 ~ 3 true leaves, the secondary seedling spacing is 8 ~10 cm; When 3 ~ 4 leaves are used, the third thinning is carried out, and the plant spacing is 16 ~ 20cm. When the seedling leaves are 5 ~ 6, it becomes a seedling, and the spacing between plants is 45 ~ 50 cm. Leave 2200 ~ 2400 seedlings per 667 square meters. At this stage, the seedlings are small and the roots are shallow. After watering twice, intertillage and weeding should be done in time. At the seedling stage, attention should be paid to the prevention and control of flea beetle and aphid, and the three seedlings should be supplemented with fertilizer and water. After the seedlings are fixed, they should be squatted properly. When the outer leaves of Chinese cabbage are dark green, the leaves are thick and wrinkled, and the central tender leaves are green, the seedlings should squat for about 15 days. Mechanical or manual ditching, depth of 25 cm, high ridge cultivation, reducing pests and diseases.