Watermelon fire mushroom nursery has the characteristics of rapid temperature rise, uniform temperature, low cost and easy operation. The robust watermelon seedlings can be cultivated in January and February when the temperature is very low. Its seedling raising effect is similar to the electric hotbed.
First, build a seedbed. First, dig a pond that is 4.5 meters long and 1.6 meters wide and 0.2 meters deep. At the same time, dig a fire pit that is 1.3 meters long from north to south and 1 meter wide and 1.5 meters deep at the end of the pond. Then, dig a 0.4-meter wide ditch around the bottom of the bed pool. The end of the burning fire pit is 0.4 meters deep and 0.2 meters deep from the end of the burning fire. The two north-south ditches form a natural slope. Cut the middle soil into a pit that is 5 cm deeper than the original pool bottom at the end of the fire pit, and the other end is inclined to the bottom of the excavated trench. In the middle of the bottom of the burning fire pit, a small ditch with a depth of 16 cm and a width of 16 cm is used to heat the fire, and dig to the other end along the south and north sides of the ditch. Then they respectively turn to the center and turn along the central slope. Burn back one end of the crater.
In the wall of the burning fire pit on the side of the seedbed, in the face of the central area of ​​the pond, an arch-shaped hole with a semicircle on top, 0.6 meters in height, 0.45 meters in width and 0.3 meters in depth is dug inwards. Above the inside of the cave, dig a 0.13 m diameter fire pit in the direction of the top fire pit in the pond to connect it with the fire pit in the bed pool. Cover the fire in the bed pool with tiles or other objects and wipe it tightly with mud so as to prevent water leakage, fill the earth and restore the original bed bottom height. The middle two fire paths should extend beyond the bed at the end of the fire pit and communicate with the chimney on the bed wall. Finally, a perimeter wall was built around the pond. The northern wall was 40 centimeters high, the south wall was 10 centimeters high, and the eastern and western ends were beveled walls.
Second, preparation before broadcast. After the seedbed is constructed, the seedbed is drained with nutrients or filled with nutritious soil for "water blockage". Nutrient soil uses 2/3 of the field soil that has not been planted in the melon crop, plus one-third of the fermented yak horse feces, or the screened field soil and half of the circle fertilizer. 0.5 kg of urea (or diammonium phosphate) is mixed in each cubic metre of bed soil, mixed and filled into a bed with a solid thickness of 10 cm. 3 days before sowing, sow the seedbed with warm water. When the water seeps through the bed, the soil is not sticky. When the mud is not sticky, block the area and mark it as 10cm. See the main soil and fill in the gap with sand. Then cover the membrane. , heating and heating.
Third, timely sowing. The sowing time should be based on the cultivation method and the required seedling age. General early-maturing watermelon should be sown in mid-February. Seed soaking and germination before sowing. When the seedbed temperature rises to above 16°C in 5 centimeters, the treated seed can be seeded into the soil or nutrient bowl before and after noon on a sunny day. The thickness of the cover soil is 1 cm. After sowing, cover the film, seal it, and cover it with straw to protect it from cold at night.
Fourth, warming management. After sowing, keep the bed temperature around 30°C. After most of the emergence, keep the bed temperature at 20-25°C during the day and 15-20°C at night. It can be maintained at 22-28°C during the day and 15-20°C at night. After emergence, grass seedlings should be exposed early cover, increase the light in the bed, if the bed is found to be too dry after the emergence of real leaves, can be sprayed in sunny water at noon 30 °C warm water, immediately after the film is covered with water. If no fertilizer is found, 2% urea water can be sprayed on the leaf surface.
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