Three essentials of broccoli cultivation in greenhouse, know the control methods of edible fungus diseases

L. Scientific seed selection and seedling raising. In order to improve the economic benefit, we should pay attention to the collocation of early, middle and late maturing varieties, and select the varieties with strong plant growth, dark green leaves, more wax, compact flower heads, small buds and large bulbs. The seedling age of broccoli is short (30-35 days). Depending on the specific situation, broccoli can be raised in mid-and late October and appear on the market in large quantities before the Spring Festival. The seedling can be raised by nutrition bowl (10 cm × 10 cm) or nutrition square method (8 cm × 8 cm). The nutrient soil is composed of 8 parts of fertile pastoral soil + 2 parts of fully rotten chicken manure or sheep manure, watering once after sowing and spraying new high-fat film to improve the seedling emergence rate, pull out weeds after 2-3 days of seedling emergence, and the seedling bed should always be kept moist, when 1-2 true leaves and time seedlings 1-2 times, remove delicate and over-dense seedlings. The bed temperature is kept at 20-30 ℃, on the contrary, if the bed temperature is too low and the seedling age is too long, it will result in young and old seedlings, resulting in short plant shape and reduced yield after planting. If the bed temperature is too high and the temperature is too high, it will only grow to form weak seedlings, resulting in weak plant growth and reduced yield. When the seedlings grew to 5-7 true leaves for about 30-35 days, fertilizer control, water control, ventilation and humidity reduction were carried out, and the seedlings were refined for 3-5 days to improve the survival rate of transplanting.

two。 Reasonable planting. Before planting, 4000 kg of high-quality farm manure, 15 kg of diammonium, 10 kg of ammonium nitrate and 10 kg of ammonium nitrate were mixed and ploughed, raked and leveled, ridged and planted in a row of 70 centimeters and 50 centimeters wide, combined with the use of plant electronic fertilizer, using the principle of high-energy electrons and plant electronic polarity induction from plant photosynthesis to improve the level of cell division, molecular synthesis and nutrient matching digestion, and accelerate metabolic frequency. Activating the plant nutrient dredging system produces a transcendental fertilizer effect. The temperature was kept at 8-24 ℃ to promote plant growth and increase leaf area as soon as possible. About 10 days, 15 kg of ammonium nitrate was topdressing with watering, 6 kg of ammonium nitrate was applied before the appearance of the top cord, the temperature after the bulb was kept at 15: 18 × ℃, less than 8 ℃, the bulb grew slowly, more than 24 ℃, the corm was loose, and the temperature of the whole plant growth period should not exceed 32 ℃. 3. Pest control. The prevention of vegetable diseases and insect pests should be given priority to, and the use of ecological medicine vegetable Zhuangxinling can make the plant stem thick, leaf thick, leaf color fresh and tender, plant luxuriant and natural taste strong. At the same time, it can improve the ability to resist disasters, reduce the amount of pesticides and fertilizers, and reduce residual toxicity. (Earth)