Sheltered watermelons are generally planted in mid-April. The management points after planting and planting are described below.
First, colonization
1. Prepare before planting. Combined with soil preparation, 5000-6000 kg of organic fertilizer per acre, 20 kg of diammonium phosphate, 15 kg of potassium sulfate, and 7.5 kg of urea, 70% Pusch after mixing, and 30% concentrated planting.
2. Colonization. In the night when the temperature stabilized above 12 °C colonization. The first row of 150 cm wide trenches, 60 to 70 cm wide, along the ditch watering, drying for 2 days, will be concentrated in 30% of the base fertilizer applied to the ditch, mixed with the soil, the groove made of 60 to 70 cm wide , 10 cm in height, in the pod on the 50 cm spacing by planting water seedlings, water infiltration after the cover soil, side seedlings side button shed, shed film width of 2 meters, arch height of 50 to 60 cm, four weeks after planting with soil pressure .
Second, post-planting management
1. Watering. After the planting of the seedlings, the seedlings are poured and then the seedlings are poured. Flowering does not water, such as drought can be poured in water before flowering, in order to promote flowering and fruit setting, timely watering melon after sitting, keep the surface see dry see wet.
2. Fertilization. When the melons have an egg size, combined with watering acres of topdressing urea 8 kg, potassium sulfate 7.5 kg, when the melon enters the expansive stage when combined with topdressing urea 8.5 kg.
3. Temperature management. Enclosed arch shed after planting, kept at 30 °C ~ 34 °C during the day, 15 °C ~ 18 °C at night, keep the seedlings at 28 °C ~ 30 °C during the day and 14 °C ~ 16 °C during the night, exceeding 32 °C to vent. With the increase of the outside temperature, the ventilation volume is gradually increased. When the temperature exceeds 18°C ​​at night, it can be ventilated until the film is removed.
4. The cultivator. Combine ventilation and remove the membrane, perform 1 or 2 times of cultivator, remove the membrane and place the melon vine in the oyster.
5. Plant adjustments.
(1) Pruning: After the watermelon stretches, it must be “rootedâ€, and the quail should be poured down. The cultivating soil on the back side of the root can be used to make the vine spread to the vine, and the double vine (or triple vine) pruning should be adopted. The vine spread leaves 1 (or 2) strong side vines at the base of the main vine.
(2) pressure vines: With vine growth, can be used to spread vines, and the vine straight fixed, promoting adventitious root growth.
(3) Make sure to stay in the melon area: It is advisable to leave the main ranch with the second female flower. If you are not sitting, you can leave the third female flower.
(4) Snoring and topping: After the main vine is sitting, leave 15 to 18 leaves in the upper part of the melon to pick up the heart, leaving 8 to 10 leaves to pick in the other side branches.
6. Artificially assisted pollination: When the second to third female flowers bloom, male flowers can be picked off at 6 to 8 o'clock in the morning and painted with female stigmas. A male flower can be applied to 2 to 3 female flowers.
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