How do you grow square watermelons?

How do you grow square watermelons? Compared with the traditional round watermelon, the square watermelon is pressed by the mold, so its internal tissue is denser, sweetness is higher than the round watermelon, and it has the advantages of convenient transportation. In addition, you can also write on watermelons, no matter what kind of words, patterns can be written on.

Planting method of square watermelon

1. Variety selection: large fruit type, strong disease resistance, thick skin and sparse planting varieties should be selected in square watermelon cultivation. We mainly choose Xinong 8, Xincheng, Zhengza 5 and other varieties.

2. Seedling raising method

Preparation of ① nutritious soil: 7 parts of vegetable garden soil that have not been planted in 3 years, 1 part of fully mature human, livestock and poultry manure, 2 parts of plant ash, 100g of 50% carbendazim wettable powder, 3 kg of calcium superphosphate and 500g of 3% phoxim granules are mixed evenly.

② seed treatment: dry the seeds for 1 day, remove the abnormal miscellaneous seeds and shrunken seeds, rinse the seeds with clean water for 1 hour, rub them with hands, wash the mucus, then soak the seeds in normal temperature for 6 hours, stir once every 3 to 4 hours, remove the seeds, dry the water, spread the seeds on a towel or gauze which is wrung dry, cover it with 1 layer of gauze to make a germination bed, and then cover it with 2 layers of gauze for 2 days. 70% to 80% seeds germinate, pick up buds in batches and sow seeds in batches.

③ sowing and seedling management: using nutrition bowl to raise seedlings. Load the nutritious soil in the nutrition bowl, leave 1-1.5 cm on it, press it slightly, pour through the water, put in the germinated seeds, 1 in each hole, cover with nutritious soil, cover with plastic film, and buckle the arch shed. Remove the plastic film in time after emergence to prevent burning the seedlings. It is ventilated on a sunny day, the temperature is kept at 2832 ℃, and the humidity is maintained at about 75%. Watering should be carried out in the morning on a sunny day, mastering the principle of not being dry or wet. The prevention and control of diseases and insect pests at seedling stage can be combined with watering. The seedlings were refined one week before planting.

3. Timely planting

① soil preparation and fertilization: select fields with high topography, smooth drainage and leeward to the sun, turn deeply, fine rake, set up, open manure ditches, apply 3000 kg of mature farm manure, 25 kg of ternary compound fertilizer, 10 kg of superphosphate and 50 kg of rotten rapeseed cake per mu to make a bed 3 meters wide.

② planting: the seedlings can be planted when they grow to 2 leaves and 1 heart. It is appropriate to use single-row planting, plant row spacing of 3 meters × 0.4 meters, pouring enough fixed root water, and putting in a certain amount of fungicide at the same time.

Field management of square watermelon

1. Topdressing in time: seedlings should be checked and replanted, and the age of melon seedlings should be similar to that of field seedlings, and attention should be paid to the control of underground pests such as ground tigers and maggots. When the melon vine grows to 30 cm, apply melon fertilizer in front of the vine, applying 10 kg of urea, 5 kg of ternary compound fertilizer and 50 kg of rapeseed cake per mu.

2. Pruning and pressing vines: double vines are used to prune, that is, to retain the strong lateral vines that occur at the base of the main vines and autonomous vines, leaving melons on the main vines. Generally, press the vine for 3 or 5 times, and stop pressing the vine after sitting down.

3. Water management: the spreading stage and expanding stage should be promoted, and the flowering and fruiting period should be controlled.

4. Retained melon and upper mold: artificial pollination can be carried out, and the 2nd and 3rd female flowers on the 1220 nodes of the main vine can be selected. If the melon fails to sit on the main vine, the melon can be selected on the 2nd and 3rd female flowers on the spare side vine. When the melon grows to the size of the fist, it can be molded. The mold is a square glass container, 40 cm long, 25 cm wide and adjustable in size. Under the pressure of the mold, the watermelon becomes square and then the mold is widened properly. If carried out for 2 or 3 times, the square watermelon with uniform color and correct shape can be grown. When watermelon 7 is ripe, the mold is removed and 8 is harvested.

5. Pest control: methyl topiramate and carbendazim can be used to control anthracnose, scab, powdery mildew, Fusarium wilt and aphids.