Watermelon is an annual herb. The fruit of the gourd watermelon. Hi-temperature dry climate. Suitable growth temperature 25 ~ 30 °C, 6 ~ 10 °C vulnerable to cold damage. In the months when the average monthly temperature is above 19°C in the months of the year and more than 3 months, open cultivation is feasible. It is a long daylight plant, hi strong light, light saturation point of 80,000 lux. Suitable for dry and hot climates, strong drought resistance, requiring good drainage, deep sandy loam soil. The fruit is crisp, sweet, juicy and rich in mineral salts and vitamins. It is the main summer fruit for the summer. Watermelon clears heat and relieves heat, and it has an adjuvant effect on treating nephritis, diabetes and cystitis. Pericarp can be pickled, tamped, jam and feed. Seeds with 50% oil content can be oiled, fried, or used as pastry ingredients.
There are watermelon cultivation in both north and south of China. The melons are round or elliptical, and the skin has dark green, green, white or green serpentine. Juicy and sweet, red, pink, yellow or white. Watermelon is called "the king of melons" because it was introduced from the Western Regions in the Han Dynasty. It is called "watermelon." Watermelon tastes sweet and juicy, refreshing and thirst-quenching. It is a fruit of midsummer. Apart from not containing fat and cholesterol, watermelon contains a lot of glucose, malic acid, fructose, protein amino acids, tomato and vitamin C. It is a kind of nutritious, Pure, food safe food.
Several points of watermelon selection
The higher the single quince weight and the higher the yield, the better the yield, the yield, the maturity of the watermelon cultivar, the environment, and the cultivation conditions. Under normal cultivation conditions, the early watermelon varieties weigh 4 to 6 kilograms per mu and produce 2500 to 3,500 kilograms per mu. The middle and late ripened watermelon varieties weigh 4.6 to 7.5 kilograms and produce 3,000 to 4,000 kilograms per mu. Waterless watermelons generally have a large size, high yield, and are relatively late-maturing. Indeed, there are also some “silly big†watermelon varieties that like to use large amounts of water and fertilizers. Although the yield of these varieties is high, the quality is often poor and the market prospects are not good. Therefore, the melon farmers must be cautious in buying those watermelon varieties that highly promote monoculture weight and yield.
The higher the sugar content, the better. Under normal cultivation conditions, the mature watermelon has a sweet sugar content of 10%. The sugar content is more than 12%, except that the high-quality small-sized watermelon and the unsalted watermelon have a sugar content of 12% or more. There are few varieties of watermelon. Moreover, the sugar content is not only related to the watermelon variety, but also has a great relationship with the external environment and cultivation conditions and the maturity of the watermelon. Therefore, the propaganda for the high sugar content of some watermelon varieties cannot be believed.
The shorter the whole growth period and the shorter the fruit development period, the better the number of days for the whole growth period of the middle and late-maturing watermelon varieties is based on the number of days required for the local spring dew-breeding and fertility process. The number of days from direct seeding to harvesting for the live direct seeding; The number of days until harvest, plus the number of seedling days. The number of days for the whole growing period of the early-maturing watermelon varieties was based on the number of days required for the local spring shed or double-film covering cultivation process, ie the number of days from the time of planting to the first batch of melons to harvest, plus the number of days at the seedling stage. The fruit development period refers to the number of days from the opening of the second female flower of the watermelon vine to the maturity of the melon. The maturity of watermelon varieties was divided according to fruit development period: 25-30 days for fruit development, early maturation, 30-40 days for medium maturity, and greater than 40 days for late maturity. The general maturing period of the early maturing variety is 80-90 days, the maturing variety is 90-95 days, and the mid-late maturing variety is more than 95 days. Small watermelons are earlier matured and their whole growth period is shorter; no watermelons are more mature and have longer growth periods. For those watermelon varieties that claim to be very precocious, the melon farmers must be clear to the breeding unit.
Ways to improve the watermelon rate
Stems timely picking. For plants that thrive, it is necessary to pick up the stems when the size of the mouth of the young melons and the color of the melons are slightly darkened. Plants that grow vigorously tend to pick up too early and are prone to cracking melons and reducing the rate of becoming melons.
Timely temperature pollination. It is the pollen activity that determines the rate at which watermelons sit. After the watermelon blossoms, pollen vitality can last for about 3 hours under sunny conditions, so pollination should be completed within this period of time. The correct course of action should be to start pollination in good weather around 8 am and try to finish the meal before 11 noon. When the temperature of the shed exceeds 33°C, it should be allowed to cool.
Gently melon guava anti-fructification. Prosperous plants appear, the vines are stout, and the young cubs grow slowly after sitting and are very prone to melon phenomenon. If the end of the young melon, that is, near the growing point, is gently pinched from the stem of the 2-3 leaves of the young melon, so that the vine can be pinched and flattened, which can reduce the transport of nutrients to the growing point and prevent the melon from growing.
Watermelon Nutrition Analysis:
1. Watermelon can be cleared of heat and heat, in addition to irritability and thirst: watermelon contains a lot of water, in acute fever, fever, thirst, sweat, irritability, eat a piece of sweet and sandy, full of water, the symptoms will be immediately Improve; 2. Sugar and salt contained in watermelon can diurete and eliminate inflammation of the kidney, protease can convert insoluble protein to soluble protein, increase nutrition of patients with nephritis; 3. Watermelon also contains substances that can lower blood pressure; 4. After eating watermelon, the urine output will obviously increase, which can reduce the content of bile pigment and make the stool smooth, which has a certain effect on the treatment of jaundice; 5. The fresh watermelon juice and fresh rind skin increase the skin elasticity, reduce wrinkles, increase luster .
Watermelon supplement information:
1. Exactly the watermelon raw and cooked: One hand care watermelon, one hand gently tapping, or tapping with the index finger and middle finger, ripe watermelon, knocking will produce a more boring voice, immature watermelon knocking sound crisp; The law is "muffled" for the ripe melon, "crunchy" for the raw melon, but some melon skin is too thick, knocking up and listening to muffled, but not necessarily cooked melon. 2. Skills to cut ripe watermelon: The ripe watermelon rinds are thin and large, and the knife burst open when it touches lightly. It is very ugly, and it is not easy to go down; If you use chopsticks, poke a 78cm at the bottom of watermelon. The left and right holes, turn a few times, then pull out the chopsticks, use a knife to cut through the hole, cut the watermelon in the same way as usual, cut the watermelon. 3. Watermelon is an excellent fruit in summer. Seeds can be used as tea food. In cooking, watermelon can be used to make ice bowl, watermelon cheese, watermelon cake and so on. 4. Watermelon is a summer fruit, and should not be eaten in winter. It should follow the law of the season. 5. Do not eat watermelon that has just been taken out of the refrigerator.
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