1, watermelon seeds sowing method

(1) soak seeds to germinate

Watermelon seeds before sowing sunshine for 2 days, and then seed disinfection, and then 55 ℃ warm water to soak the seeds, will be processed seeds washed, placed in the thermostat 40 ℃ high temperature sprouting 6 hours, 33 ℃ at a constant temperature to germinate, when the root of the embryo grows to 0.5 cm when you can sow.

(2) Preparation of seedbeds

Watermelon seedbeds selected leeward and sunny, high and dry terrain, easy to manage plots, early spring nursery in the greenhouse or greenhouse, autumn delayed nursery should be built after the awning, the nutritional requirements of sparse, no pests and diseases, the proportion of nitrogen, phosphorus and potassium fertilizers, slightly sticky.

(3) timely sowing watermelon early maturing varieties of the previous year in mid-December to late March sowing, mid-maturing varieties of April to June sowing, after the fall delayed sowing in mid- to late-July, sowing 1 day before watering, sowing the seeds flat in the nutrient mantle, 1 per mantle, covered with a fine and then add a film.

(4) temperature management watermelon seed bed after the daytime temperature control at 28 ~ 35 ℃, 20 ~ 25 ℃ at night, to be 80% of the seed break * seedling during the day to maintain 20 ~ 25 ℃, 15 ~ 18 ℃ at night, after the emergence of the first true leaves to maintain the daytime 25 ~ 28 ℃, transplanting 1 week before the start of seedling refining.

(5) water management watermelon seedlings out of the ground before the general no longer watering, cotyledon period should be controlled watering, the true leaves after the exhibition can increase the amount of watering. In addition, pay attention to uncovering the film ventilation, to prevent high temperature and high humidity. Autumn extension of watermelon seedlings period of high temperature and dryness, should pay attention to the water supply.

2, watermelon seeds planting technology

(1) Selection of land fertilization

watermelon planting should be selected deep soil, loose soil, drainage and irrigation convenient sandy loam, base fertilizer to organic fertilizer and cake fertilizer, inorganic fertilizer as a supplement, generally accounted for the total amount of fertilizer 60-70%, nitrogen, phosphorus, potassium reasonably match, micro-fertilizer according to the case of bottom application or spraying.

(2) timely planting

Watermelon early varieties of seedling age of about 1 month to grow 2 to 3 true leaves can be planted, medium maturity varieties of seedling age of 20 to 25 days, late varieties of seedling age of 7 to 10 days can be planted, wide bed planting 2 rows, narrow beds planted 1 row, transplanting side of the film.

(3) the whole vine

watermelon is generally used in the three-tree branching way, the main vine 8 ~ 9 leaves when the main vine and two strong side vines, vine growth to 50 cm when combined with the whole branch with soil pressure vine, and then the interval of 3 ~ 4 sections and then pressure 1 time, each vine *** pressure 2 ~ 3 times, the melon vine evenly arranged.

(4) sit melon turn melon

watermelon choose to stay on the main vine of the 2nd, 3rd female flowers or side trails of the 1st, 2nd female flowers sit melon, in case of low temperatures or cloudy and rainy weather should be used to artificial pollination, the fruit is fully grown should be turned in time to turn the melon, turn the melon turn in one direction, turn each time about 1/3.

(5) water and fertilizer management

Watermelon young watermelon grows to the size of an egg, depending on the plant's growth potential to apply melon expansion fertilizer, generally acres of 45% nitro-sulfur-based or potassium sulfate-type controlled-release fertilizer 15 to 20 kg, the lack of water should be in the lower temperatures of the morning and night night irrigation, while the rain after the timely drainage of water in the field.

(6) timely harvesting of watermelon harvesting should be carried out in the morning, long-distance transportation or storage in the eight ripe harvest, suburban day sales in the nine ripe harvest, the general early varieties in the pollination of about 30 days, the middle-ripe species of about 35 days, late-ripe species of about 40 days of harvest.

(7) pest control of watermelon, the main diseases are wilt, anthracnose, virus disease, powdery mildew, epidemics, etc., the main insect pests are small tigress, aphids, red spiders, yellow guardian melon, melon maggots, submerged leaf fly, etc., to strengthen the prevention and control in the process of planting management.