Pick up four points during the autumn cauliflower

Autumn cauliflower is in the transition period from the rosette period to the ball-forming period. After the ball-forming period, the requirements for fertilizer and water are high. Grasping scientific management and improving quality and yield are the basis for increasing production and income. Autumn cauliflower is good for high yield and high efficiency, mainly focusing on four aspects.

1. Water and fertilizer management Cauliflower is a kind of vegetable crop that is fertile and fertile. The demand for fertilizer is large during the expansion period of flower bulbs, accounting for more than 70% of the whole growth period. When the heart leaves grow out of the flower ball, the top dressing should be applied again, and the phosphorus and potassium fertilizer should be added appropriately. Combined with watering, 20 kg of ternary compound fertilizer with nitrogen, phosphorus and potassium (select low-nitrogen, high-phosphorus and high-potassium compound fertilizer) per acre, and then pour small water once every 5-7 days to avoid drought. Flower ball. In addition, the quality of cauliflower can be greatly improved by root dressing. The cauliflower is sensitive to trace elements such as boron and copper. It can be combined with anti-disease and pest control to spray high-efficiency liquid fertilizer such as potassium dihydrogen phosphate, green leaf treasure and borax 2~3 times.

2. Bunch of leaves shading Autumn cauliflower grows under strong light, which makes the flower ball turn yellow. In order to ensure the whiteness and tenderness of the flower ball and improve the commerciality, the flower ball should be shaved in production. When the diameter of the flower ball reaches about 10 cm, the old leaves of the base are removed to cover the flower ball, so as to avoid the high temperature, the flower ball is loose or the flower is sucked. It is also possible to bundle 4 to 5 large leaves close to the flower ball to cover the flower ball, avoiding direct sunlight and affecting the quality and appearance.

3. Disease prevention and treatment of diseases mainly include viral diseases, downy mildew, black rot, soft rot and so on. For the prevention and treatment of viral diseases, 20% of virus A wettable powder 500~600 times solution can be used for spray control; downy mildew can be sprayed with 68.75% silver method water; soft rot and black rot can be used 72% agricultural streptomycin sulfate 4000 The liquid is sprayed and controlled. The main pests are aphids, cabbage caterpillars, diamondback moth, beet armyworm, and Spodoptera litura. Aphids can be sprayed with 2.5% imidacloprid 1000~1500 times solution; cabbage caterpillar, diamondback moth, beet armyworm, Spodoptera litura, etc. can be sprayed with 1000 times solution of beta-cypermethrin emulsifiable concentrate.

4. Harvesting autumn cauliflower from the time of flowering to harvesting is generally about 25 days. Premature harvesting will affect the yield. Too late will cause the flower ball to be loose and affect the quality. Production should be carried out in stages and sold in stages. Generally, when the flower ball is fully grown, the surface is round, and the edge is not scattered, it is harvested. It is harvested once every 2~3 days, and the flower ball is retained 2~3 when harvested. Leaflets to protect the flower ball. Improve merchandise. (Wang Hu)