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Second, watermelon production technical advice (a) field pui pipe: For the transplanted melon seedlings, pay attention to temperature and humidity management, a week after planting, greenhouses and small ring sheds are generally not ventilated (sunny weather can be properly disclosed after nine o'clock Ventilate the greenhouse to adjust the temperature and humidity in the shed. Ensure that the temperature in the shed is maintained at 25 to 30°C during the day and 15°C at night to facilitate seedlings and rooting. Appropriate ventilation after a week should be based on the outside weather conditions and temperature inside the shed to open the door and open the small ring to regulate the temperature and humidity conditions, in order to facilitate the growth of melon seedlings.
(B) seedbed management: pay attention to antifreeze and warmth, in the temperature management should adopt two high two low management methods, such as temperature rise before emergence (daytime 30 °C, night 18 °C), the emergence of cotyledons to cool down (daytime 28 °C, 15 °C at night) The cotyledons were unfolded until Peyen (25°C during the day, 15°C during the night) before transplanting and cooled one week before transplanting (the temperature should be kept in a state similar to that of transplanting greenhouses); in terms of humidity management, generally during the whole emergence process No watering, after emergence, should be based on the weather conditions and the wet and dry condition of the seedbed, and appropriate water transfer in the afternoon on fine weather; in the prevention and treatment of diseases (such as anthrax, damping-off, etc.) pest (aphid) damage, in the adoption of agriculture On the basis of prevention and control, 800 times of anti-virus scorpion and 600 times of thiophanate-methyl were used to prevent and control disease, and dictopapyr was used to control 3,000 times.
(3) Preparation before nursery: (1) Preparation of nutritious soil: The rational allocation of nutritious soil is cultivating, which can effectively control the occurrence of disease at the seedling stage. There are two kinds of general nutrient soil formula, one is 90% of bed soil, 8% to 10% of organic fertilizer, 1% of superphosphate; the second is 94% of bed soil, 5% of cooked cake, 1% of superphosphate. After the materials were mixed well, nutrient soil was mixed with thiophanate-methyl 1000-fold solution to disinfect the nutrient soil. (2) Seedbed setting: At present, the temperature and the ground temperature are still relatively low, and it is necessary to use a warming line to raise seedlings. Generally, 88 cm seedlings are used to raise seedlings, and small ring sheds are placed on the greenhouse seed beds to increase the effect of keeping warm, moisturizing and warming.
(D) Daejeon preparation: On the basis of the winter turning of Daejeon, one month before transplanting, basal fertilizer should be used in combination with soil preparation, 2000 kg of organic fertilizer for Mushi, 50 kg of high-efficiency compound fertilizer, and 25 kg of phosphate fertilizer. Laying mulches, closing greenhouses to increase ground temperature. When the temperature below the membrane is higher than 10°C, choose sunny day and transplant timely, pour rooted root water and cover small ring shed (add one or more layers of plastic film according to transplanting time) to ensure normal growth of seedlings.
Watermelon current production technical advice
First, the current production situation As the temperature gradually warms up, Chongming County, West melon production into the nursery transplanting stage. According to a recent survey, the watermelon planting area in early spring is about 45,000 mu. Currently, the area of ​​transplanted watermelons is about 15,000 mu. The area to be transplanted is 20,000 mu. There are still about 10,000 mu of freshly planted or ready to sow. 70% of transplanted watermelons are in the seedling stage, and 30% are in the root growth stage.