5. Seedling management
(1) Pre-management
The daytime temperature of spring and summer nursery seedlings is maintained at 25°C～28°C and 15°C～18°C at night. The seedlings are unearthed to the cotyledons and the true leaves are exposed. The daytime temperature is maintained at 22°C～25°C and nighttime at 16°C～18°C; 3 to 5 days without ventilation. Keep seedlings at 25°C to 30°C during the day and 18°C ​​or more at night.
Autumn tomato nursery, during the day, high temperature weather should be shaded, the bed temperature should not exceed 30 °C, rain cover the film rain; sowing after seedling bed soil to keep moist.
(2) seedlings
2 to 3 true leaves division seedlings. The seedlings were divided into nursery beds spread with nutritious soil, with a spacing of 10 to 12 cm and a spacing of 10 cm; they were also divided into 10 to 12 cm diameter nutrient bowls. When using grafting cultivated rootstocks divided into direct nutritional mortar.
(3) management sub-postemergence
During sub postemergence Huanmiao midday shade should be appropriate, the bed temperature during the day and 25 ℃ ~ 30 ℃, the night 18 ℃ ~ 20 ℃; 25 deg.] C during the day and about Huanmiao, night 15 ℃ ~ 18 ℃. One week before colonization, gradually remove the cover for seedling exercise.
6. Grafting
(1) Grafting method is generally used for grafting method and time. Rootstock 5 to 6 true leaves, scion 4 to 5 true leaves, grafted about 5 mm thick.
(2) The suitable temperature for the healing period of grafted seedlings after grafting is 25°C～26°C during the day and 20°C～22°C during the night. The air humidity during the healing period is kept above 95%. After 3 to 4 days after grafting, the plants were completely shaded and gradually saw light in the morning and evening. As the wounds healed, the coverings were gradually removed and then transferred to normal management after survival. After the grafted seedlings survived, the sprouts of the rootstocks were promptly removed.
V. Soil fertigation
For each 667m2, apply 5000 to 7000 kg of organic fertilizer with good quality, 50–60 kg of NPK fertilizer (15—15—15), and 100 kg of superphosphate. After fertilizing, plough deep into the soil to make a sorghum with a spacing of 110 cm. The width is 50 cm. Fertilizer should meet the requirements of NY/T496 and NY525.
Sixth, colonization
Planting a trench and planting a trench, with 2 rows per plant, generally 35 to 40 cm in early-maturing varieties, and 45 to 50 cm in late-maturing varieties. Nutrient seedling nursery, planting depth to the top surface of the nutrition block is flush with the surface or slightly deeper. Seedling nursery, should be poured 4 to 5 hours before planting a permeable, more with soil, reducing root injury. When grafted seedlings are planted, the grafting interface should be more than 3 cm above the surface.
Seven, field management
1, humidity management
After 5 to 7 days after planting, the seedlings were watered once, then the water was controlled and the seedlings were appropriately planted. Grafting seedlings should not be planted after planting. After the first fruit is in the ground, it is combined with topdressing to remind the fruit and water. During the entire result period, the soil should be kept moist and the water should be even to prevent it from drying out. At the end of the result, irrigation is usually done every 3 to 5 days. After heavy rain, it should be drained in time to prevent rot.
2, top dressing
After easing the seedlings, topdressing a “accelerating seedling†fertilizer, topdressing 10-15 kg of urea per 667m2. When each ear begins to swell, it will be top-dressed. Generally, every time every 667m2 of NPK fertilizer (15-15-15) will be 20-25kg, or 500kg of decomposed manure, or 80-100kg of cooked cake. The topdressing is stopped 30 days before pulling.
3, plant adjustment
(1) Stretching and tying the vines with a pedestal, and placing the vines in the shade of the leaves in the truss to avoid burning the fruit.
(2) Pruning method
Single stem pruning: only retain the main shaft, remove all the lateral branches that grow within the leaf axils. Late-maturing varieties should adopt single stem pruning.
Double dry pruning: In addition to the main shaft, the first side branch under the first inflorescence is retained, and the other side branches are all removed. Early maturing varieties use double dry pruning.
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