Bulbous fennel enjoys cool climate, strong adaptability, cold resistance and heat resistance, easy cultivation, and suitable for cultivation in winter protected land. Cultivation of greenhouse broccoli in northern China is generally planted in late January-early February, with a seedling age of about 30 days. Harvesting begins from late April to May. Its post-planting management techniques are as follows:
First, prepare before planting
1. Greenhouse disinfection Before the planting, 40% Nova emulsion 800 times solution or 25% Triadimefon 400 times solution is sprayed in the greenhouse.
2, fertilization to do pods to obtain the high yield of bulbous fennel, per acre Shi quality decomposed organic fertilizer 3000 kg or 300 kg of puffed chicken manure, NPK fertilizer 30kg, potassium sulfate 25kg, zinc fertilizer 1kg, boron fertilizer 1kg. (The soil is sterilized by applying 50% of Fukami's 1kg and 80% of carbendazim to 1kg per acre.) Then we turn the tillage and make it into a 10cm high and 65cm wide sorghum.
Second, planting
Select sunny morning. Two rows of bulbous fennel were planted on the well-built sorghum plant. The rows were 25 centimeters apart, and the row spacing was 40 centimeters. The plant spacing was 25-30 centimeters, and about 6000 plants were planted per acre. The greenhouse cultivation should not be too dense, otherwise it is prone to decay of bulbs. When planting should not be too deep to prevent slow seedlings.
Third, management after planting
1, watering planting when planting water, slow seedlings after pouring water, start seedlings 7-10 days, strengthen the ploughing, promote the development of the Department. Leaf sheaths are combined with cultivator for fertilization. Afterwards, keep the soil moist, especially when it enters into the period of leaf sheath hypertrophy. At this time, the water requirement increases, and the number of times of watering should be appropriately increased. Watering bogey suddenly big and small, so as not to cause the ball.
2, fertilization
The first top-dressing: When seedling height 30cm (7-8 leaves), Mushi biological compound fertilizer 10kg or urea 10kg, potassium sulfate 5kg.
The second top-dressing was carried out when the bulbs began to swell, and the dosage was increased by 30% over the first increase.
The third top-dressing: the rapid expansion of bulbs was carried out with the same dosage for the first time.
3, temperature management
After planting until the easing of seedlings, maintain a relatively high temperature, in order to promote the early slow seedling survival, during the day 20-25 °C, 15 °C at night. After the seedlings are moderately cooled, they can be prevented from growing indefinitely, during the daytime at 15-20°C and at night around 10°C. The optimum temperature for bulbous fennel growth is 15-20°C, and poor growth occurs when it exceeds 28°C. Therefore, pay attention to ventilation and heat preservation to ensure that the plants grow well. In early spring greenhouse cultivation, attention should be paid to early insulation. Late autumn cultivation should pay attention to the early shade, ventilate cooling, late attention to insulation, in order to ensure the normal growth of bulbous fennel environmental conditions.
IV. Disease Prevention
1, powdery mildew can be sprayed at the initial stage of the disease, 120, or Wuycin 200-300 times, or 40%
Fuxing EC 8000 times, or 15% Triadimefon 1000-1500 times. Once in 7-10 days, spray 2-3 times. Can also be sprayed with 5% chlorothalonil powder, available 1kg per mu.
2. Control of Botrytis cinerea in Agriculture: Pay attention to ventilation and reduce air humidity. Use sorghum to cultivate and avoid flooding. Chemical control: can be sprayed with 50% Triflumne 500 times solution or 50% Turbodosus suspension 1000 times solution. Plants flourish or even cloudy days, the best choice for dust or aerosol control.
3, root rot agricultural control: the use of decomposed organic fertilizer to reduce the root cause; pouring water, and pay attention to water after shallow cultivator. Chemical control: prevention before planting, before transplanting, 50% carbendazim 500 times liquid irrigation planting points, each hole 0.25kg liquid. At the beginning of the disease, 50% carbendazim 500 times solution or 10% double effect lingzhi agent was used to irrigate the roots. Irrigation liquid per strain 500g.
V. Harvesting
When the bulb fennel grows above 250g, it can be harvested. Harvesting affected the yield too early, and bulbs were harvested at too late and the quality was reduced. After harvesting, the root plate was cut to remove yellow leaves, leaving about 5 cm of petiole in the upper part of the bulb, and the rest were all cut off.
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