How can broccoli be planted with high yield?

How can broccoli be planted with high yield? Please introduce the cultivation of broccoli to obtain high yield can refer to the following planting methods: first, variety selection in the selection of early-maturing, high-quality varieties. Second, sowing time and method (1) sowing time sowing in early January in greenhouse. (2) sowing method 1, select seedling tray to raise seedlings 2, select seedling raising site for raising seedlings, prepare sowing beds, first fine soil preparation, apply 2 kg organic fertilizer per square meter, 100 grams of compound fertilizer is mixed evenly and then flatten the bed surface, about 5 square meters of seedling bed is needed for every 667 square meters of broccoli. Pour enough bottom water on the seedling bed before sowing, spread 5 grams per square meter of dry seeds, and cover 1 layer with fine soil after sowing. 3. Cultivation techniques (1) Management of seedling stage 1. Management of cotyledon stage raising seedlings in spring from January to March, attention should be paid to the cold prevention and heat preservation of the seedbed, the temperature of the seedbed should be kept at 20: 23 ℃, the lowest temperature should be no less than 10 ℃, and the seedbed should be in the greenhouse. 2. About 15 days after seeding, the seedlings can be divided when the two cotyledons are strong and the true leaves are exposed, and the seedling bed can be sprayed with water before the seedling is divided. The seedling can be divided into two ways: nutritious soil and ground seedlings. During the seedling separation period, the management is generally dry and wet, not dry and not watered, to prevent the seedlings from growing. (2) colonization 1. 30-35 days after planting, that is, mid-late February, strong seedlings can be planted when they grow to 5-7 leaves, and strong seedlings can be selected when planting. 2. Land preparation is used to make a small high border with a width of 120 cm, and plastic film can be laid under certain conditions. 3. Before planting, the seedlings should be watered thoroughly, and the seedlings should be planted with soil blocks to reduce root damage, and then water should be watered. The row spacing of broccoli in spring is mostly 55 cm, with 2500-2700 seedlings per 667 square meters. (3) Field management after planting 1. Temperature and humidity management. The temperature in the greenhouse exceeds 25 ℃ at noon. After the temperature in the greenhouse drops, close the edge seam of the greenhouse. 2. The light should wipe off the dust on the greenhouse film in time and reduce the shading of the greenhouse film. 3. The general principle of fertilizer and water management is to water once every 15 days, and after watering, ploughing can regulate soil temperature and humidity and promote plant root growth. 4. The lateral branches and lateral flower bulbs of the plant should be knocked off in time. (4) Disease and pest control 1. Common diseases of broccoli, downy mildew, brown rot and black spot. Control methods: (1) strengthen cultivation management, balanced fertilization, and rotation with non-cruciferous vegetables. (2) seed disinfection and 40% thiram seed dressing. (3) controlling ① downy mildew with insecticides. 40% ethyl phosphate aluminum wettable powder 300x ② brown rot. 70% methyl thiophanate wettable powder 600x ③ sclerotiorum. 70% methyl thiophanate wettable powder 600 times. 2. Common pests of broccoli, Plutella xylostella, Pieris rapae and aphids. (5) when the bulb diameter of the harvested broccoli reaches 1215cm, the bulb is tight and does not scatter, the small bud grain is small and the color is green, it should be harvested in time. Click to get more cauliflower planting techniques click to get more vegetable planting techniques