In the process of conventional papaya seedlings, seedlings are not transferred. Two to three seeds are sown in each seedling cup, and one seedling is selected after seedling selection. The utilization rate of seeds is very low. Move seedlings in the early stage of nursery to ensure that each seedling can grow into a strong seedling, improve seed utilization, can reach 90% to 95%, at the same time can eliminate diseased plants, effectively prevent cross-infection. The technical points are: the matrix of the tray seedlings should be loosened, the nutrition cup matrix should be air-permeable and solidified, and the root system must be protected when the seedlings are set, and it can not be subject to great harm.
1 Preparation of nursery substrate
1.1 Prepare the tray seedling substrate preparation Tang mud is crushed and sieved to particles smaller than 0.5cm, and then mixed with the mushroom residue of the stacking 2-3 months according to the volume ratio of 4:6, and mixed with ternary compound fertilizer 10kg, add water To moisture content of 65% to 75%, piled up and sealed for 15 days to use. Seedling Plug Specifications: Polystyrene plug (Specification: 72cm20cm7cm, 4.5cm4.5cm square cone hole).
1.2 Nutrition cup mud is prepared with permeated ice, good air permeability, slightly sandy loess or wall mud, 40kg per 1m3 of Jialetian exquisite organic fertilizer, 8～10kg of ternary compound fertilizer, 15kg of lime, 70% citric acid Bujin 80-100g and herbicide cable 100g, mix and stack for 15 days until use. Nutrition cup specifications: high 10 ~ 12cm, diameter 7 ~ 9cm (bottom and side left drainage holes).
2 The matrix is ​​loaded and the cup is inserted into the cavity of the plug tray for use.
Put the cup of nutritive mud into a nutrient-cultivation cup or similar plastic bag, and put about 3/5 cups of mud, ready for use.
3 Seed sowing seeds to be sown with warm water (18 ~ 25 °C) soaked 1h, picked up, and then 50% carbendazim 500 times soak 10 ~ 15min, picked up with water rinse 2 ~ 3 times, and then soaked for 12h, Take up, dry, and wrap it in a sterilized wet towel and place it in a thermostatic chamber at 30 to 32°C. After about 72 hours, the seeds began to bloom one after another. The whitening seeds could be sowed in the plug tray. Each hole was sown with 3 to 4 seeds and sown continuously for 4 days. The rest of the shoots were sown without sowing, and 5 to 6 seeds per hole were planted. Every time you sow a thin layer of 1～2cm thick soil, cover the net yarn and drench the water.
After sowing, keep the soil moist and avoid drying. After emergence, leach 1 times 50% carbendazim 800 times, do not apply fertilizer, keep the soil moist, this time each seedling has 1 ~ 4 seedlings.
1 Preparation of nursery substrate
1.1 Prepare the tray seedling substrate preparation Tang mud is crushed and sieved to particles smaller than 0.5cm, and then mixed with the mushroom residue of the stacking 2-3 months according to the volume ratio of 4:6, and mixed with ternary compound fertilizer 10kg, add water To moisture content of 65% to 75%, piled up and sealed for 15 days to use. Seedling Plug Specifications: Polystyrene plug (Specification: 72cm20cm7cm, 4.5cm4.5cm square cone hole).
1.2 Nutrition cup mud is prepared with permeated ice, good air permeability, slightly sandy loess or wall mud, 40kg per 1m3 of Jialetian exquisite organic fertilizer, 8～10kg of ternary compound fertilizer, 15kg of lime, 70% citric acid Bujin 80-100g and herbicide cable 100g, mix and stack for 15 days until use. Nutrition cup specifications: high 10 ~ 12cm, diameter 7 ~ 9cm (bottom and side left drainage holes).
2 The matrix is ​​loaded and the cup is inserted into the cavity of the plug tray for use.
Put the cup of nutritive mud into a nutrient-cultivation cup or similar plastic bag, and put about 3/5 cups of mud, ready for use.
3 Seed sowing seeds to be sown with warm water (18 ~ 25 °C) soaked 1h, picked up, and then 50% carbendazim 500 times soak 10 ~ 15min, picked up with water rinse 2 ~ 3 times, and then soaked for 12h, Take up, dry, and wrap it in a sterilized wet towel and place it in a thermostatic chamber at 30 to 32°C. After about 72 hours, the seeds began to bloom one after another. The whitening seeds could be sowed in the plug tray. Each hole was sown with 3 to 4 seeds and sown continuously for 4 days. The rest of the shoots were sown without sowing, and 5 to 6 seeds per hole were planted. Every time you sow a thin layer of 1～2cm thick soil, cover the net yarn and drench the water.
After sowing, keep the soil moist and avoid drying. After emergence, leach 1 times 50% carbendazim 800 times, do not apply fertilizer, keep the soil moist, this time each seedling has 1 ~ 4 seedlings.
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