1. Increase the temperature difference between day and night. The temperature in the shed should be controlled at around 35°C during the day and around 18°C ??at night. Maintaining a temperature difference of more than 10°C is beneficial to the accumulation of sugar in photosynthetic products and increases the sugar content of the melon. 2. Apply more phosphorus and potassium fertilizers and control nitrogen fertilizers. The soil has high nitrogen content and insufficient potassium fertilizer, causing vigorous vegetative growth of the plant and hindering the transfer of photosynthetic products to the fruit, thereby reducing the quality of the melon. Therefore, phosphorus fertilizer and potash fertilizer should be increased, and the amount of nitrogen fertilizer should be controlled to achieve the purpose of increasing the sugar content of melon and improving its quality. 20 kilograms of potassium sulfate compound fertilizer can be applied per mu with water, and 500 times of potassium dihydrogen phosphate solution can be sprayed on the leaves to supplement phosphorus and potassium fertilizer. 3. Reduce the amount of watering during the middle and later stages of fruit expansion. Reducing the amount of watering during this period will not only increase the sweetness of the melons, but also reduce the proportion of cracked melons. Because the water supply situation in the middle and late stages of development is also directly related to the sugar accumulation and conversion in the melon fruit. The plant absorbs more water and accumulates less sugar. The melon is bland and tasteless, so the amount of watering should be reduced as much as possible. No watering 8 to 10 days before maturity is good. good. 4. Maintain good ventilation and light transmission conditions. Good ventilation and light conditions must be maintained in the shed to promote the full expansion and development of the fruits and the accumulation of sugar. Old leaves, yellow leaves, diseased leaves, etc. that have no photosynthetic ability at the bottom of the plant should be removed in time, and the air should be released in time during the day to ensure that the plant absorbs sufficient carbon dioxide to meet the photosynthesis requirements. ----------Appropriate cultivation methods will also increase sweetness 1. Land selection, soil preparation, and fertilization.

Melon tolerates drought but not waterlogging, and likes sandy soil but not clay soil. It is best to choose sandy loam soil with high terrain and good drainage. It is best to use corn, wheat, etc. as the first crop, and avoid soybeans and melons. If conditions permit, it is best to plow the ground in autumn to a depth of 20 centimeters, and rake it flat and finely, which is conducive to moisture conservation. In spring, top slurry, ridges, and farmyard manure should be applied.

The root system is well developed and the ability to absorb nutrients from the soil is strong. Under normal growth conditions, the absorption ratio of nitrogen, phosphorus and potassium is 2:1.3:7, and the entire growth period is

The demand for nitrogen, phosphorus and potassium is also different. The seedling stage does not require much fertilizer, but it requires more nitrogen and phosphorus during the spreading stage. The demand for potassium gradually increases after the melon is set, and the fruit expansion reaches its peak during the fruit expansion stage.

Additional application of phosphorus and potassium fertilizers in conjunction with nitrogen fertilizers can increase melon production, increase sugar content, and reduce disease incidence. Therefore, scientific formula fertilization must be applied, and base fertilizer should be applied first. Due to soil fertility and

Depends on the quality of farmyard manure. Generally, 4,000-5,000 kilograms of fermented chicken manure and sheep manure, 15 kilograms of diammonium phosphate, and 25 kilograms of potassium sulfate are applied per acre, because melons are sensitive to chlorine

, you should be careful not to use potassium chloride fertilizer. When preparing the land, apply it deeply at once, close the ridge, and the ridge width is 90 cm. Spray phoxim to kill underground pests, and then cover it with mulching film to protect the moisture. Wait until colonization.

2. Seed selection and seedling cultivation

The seedlings are sown 30 days before planting in the open field or in a greenhouse, usually in early April, around Qingming Festival. First, select some variegated and deformed seeds as cleanly as possible

sensoryly. Dry the seeds two days before soaking. After being exposed to sunlight, the dormant state will be broken and the sprouts will germinate neatly, which is conducive to the growth of the seedlings. , seedlings are strong, and the seeds that have been dried in the sun should be soaked in hot water of about 55℃ for 6-8 minutes before germination. Pay attention to the water temperature not being too high. Soak the seeds for 4-6 hours after the water temperature naturally cools down. After soaking the seeds, remove and wash the mucus, and then pour 3-4 times the amount of seeds into a chemical to soak the seeds. Commonly used chemicals include the following. Soak 0.1% potassium permanganate for 2-4 hours, 600-700 times solution of 20% fukunin,

Soak for 2-4 hours, 500 times solution of 70% thiophanate methyl or 1000 Soak in 50% carbendazim solution for 30-40 minutes, you can choose any one. When soaking in the agent, the seeds should be stirred frequently to ensure that the seeds absorb the agent evenly. Germination: Wash the seeds soaked in the medicinal solution with clean water and put them in a basin. Cover them with a towel and place them on the kang for germination. The required temperature is between 28-32℃

, and 16-24 hours is enough. All buds emerge. Sowing: Nutrient bowls are commonly used to raise seedlings. The nutrient soil in the nutrient bowls is composed of field soil, decomposed farmyard manure and an appropriate amount of phosphorus

Potassium fertilizer and chemicals. Corn stubble soil should account for 50% of the field soil. , 30% peat soil (or bottom of the pile), 20% decomposed pig manure and chicken manure; about 250 kilograms of fine soil plus potassium dihydrogen phosphate

0.5 kilogram, 0.5 kilogram of seedling mother agent, stir well Install the pot. After the nutrient pot is installed, transplant the seedlings, place them in a straight, tight position, and water them once. After the water seeps out, cover them with fungus or touba soil

A layer of 0.2 cm thick, and then put 2 seeds in it. After germination, the seeds should be covered with medicinal soil to a thickness of 1 cm. After all is completed, cover them with mulch film, fasten the shed, and remove the mulch film after the seedlings emerge.

3. Management during the seedling period

Management during this period is very important. In order to ensure strong and good melon seedlings during planting, attention should be paid to warming and insulation. The daytime temperature Keep the temperature at 30-35°C.

It is best to keep the temperature above 18°C ??at night and not lower than 15°C. Try to shorten the temperature difference between day and night as much as possible. The seedlings can emerge after three days. After the seedlings emerge, the temperature in the shed must be properly controlled. During the day, Keep the temperature above 25℃

and above 18℃ at night. If the temperature is too low or too high, it will cause damping-off disease in the seedling stage. When the seedlings grow to three leaves, they need to prevent leggy growth. 7-7 days before planting. Start cultivating the seedlings after 8 days

Uncover the shed during the day on a sunny day and cover it again at night. Watering must be strictly controlled during the entire seedling period. Small seedlings cannot be watered. Do not water unless there is drought. Do not pour cold water. It is best to replenish water. It is best to add 6000 times of liquid love to make the seedlings take root quickly.

4. Planting

When planting, first use an eye drill to make holes on the film-covered ridges about 40 centimeters apart, and then place the nutritious melon seedlings in the planting holes. After the melon seedlings are planted, water should be poured regularly

After the water seeps out, the holes should be sealed and covered with arch film. The brackets are generally made of bamboo strips, bamboo slices, tree strips, etc., with a spacing of about 1 meter and not too wide. To prevent wind blowing, the film can be buckled in a single or double ridge, depending on the conditions. The edges must be compacted after the film is buckled. Melon seedlings generally do not need to be slowed down.

5. Field management

During this period, the sun is abundant and the temperature is high during the day. The ventilation must be good. The vents of the shed should be opened after 8 a.m. and 4 p.m. Seal it before opening, and vents should be opened every 10 meters on the leeward side of the shed. As the temperature rises, the temperature in the shed should be controlled within 30-35°C to ensure the normal growth of melon seedlings.

If cultivated according to the above methods, the sugar content of the melon produced will definitely increase