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First, choose the appropriate varieties of thin-skinned melon is muskmelon strains, hi temperature hi light. In order to achieve early maturation and high yield, mid-early maturing varieties with high yield, disease resistance, low temperature resistance, and low light resistance must be selected, such as medium-early maturing varieties such as sapphire and Hongcheng No.5.
Second, soil preparation Fertilization multi-span greenhouse cultivation melon density is greater, the amount of fertilizer required more, therefore, must be enough base fertilizer. 15 to 20 days before planting, 667 square meters of high-quality rot fertilizer 5000 kg or more, combined with deep-turning 40 cm plus 50 kg of ternary compound fertilizer, 20 kg of potassium sulfate. After the ploughing, the deep ridges were formed and the ridge width was 60 cm and the depth was 33 cm.
Third, timely colonization on the basis of nursery, began in early March colonization. 15 to 20 days before planting, the soil is buckled and the ground temperature is raised. After the planting, a small shed is erected to promote easing of seedlings. The planting holes were determined according to the spacing of 60 cm, and 1,860 plants were planted per 667 m2.
Fourth, strengthen field management
1. Temperature regulation. In the early stage of planting, heat preservation and slowing of seedlings are mainly used. The temperature of the greenhouse is controlled at 28-32°C in the daytime; the night cover is uncovered on the small arch cover day after the seedling is slowly covered, and the grass cover or paper quilt, cotton is covered on the small arch cover in case of cold air or cold wave. It is protected by freeze protection. Grasshoppers must be uncovered in a timely manner and, as long as they are kept at a suitable temperature, they should be released as early as possible to prolong the duration of the light. The proper temperature management is implemented in the shed. During the daytime, the temperature is controlled at 25 to 30°C. The greenhouse is ventilated on sunny days, windy and windy on the windy day, and cloudy at noon on rainy and snowy days. 10 to 15 days before fruit ripening, increase the amount of ventilation, do not close the ventilation holes at night during sunny days, increase the temperature difference between day and night in greenhouses, in order to improve the quality of melon.
2. Fertilizer management. When planting, the seedlings should be poured with water and the seedlings should not be watered before flowering. Too many water-retaining components make the plants long and cause fruit drop and fruit drop. After fruiting, when the melon grows to the size of the egg, you can chase the fertilizer once and water it immediately after topdressing. For each 667 m2, 20 kg of compound fertilizer, 10 to 15 kg of urea, 10 kg of potassium sulfate or 800 to 1000 kg of diluted manure water are applied. Watering is stopped 7 to 10 days before harvest to increase the sweetness of the melon.
3. Plant adjustments. The use of double vine pruning, the main vine after topping the heart, choose to leave two healthy cranberries. After removing the vines of the vines and leaves before the 5th leaves, the leaves of the leaves of the leaves were chosen to stay at 6, 7 and 8 leaves. Sun Man leaves 2 leaves topping, and 6 to 8 leaves are picked after the fruit set. Sun Man removed early.
4. Hang vines. After the vine spreads, it is tied to the top of the greenhouse with one end of the tear film, one end is tied with a bamboo cull on the ridge, and the vine is wound on the film line to make it climb and spread the guava evenly in the shed space. When the melon grows to the size of an egg, one end of the film line is tied to the guati, and one end is tied to the roof of the shed, so that the guava vine and the vine are vertically arranged.
5. Assistant pollination. Greenhouse cultivation melon must be artificial pollination in order to ensure fruit set. Male flowers opened on the same day were used to pollinate the female flowers, and the pollen was gently applied to the female stigma. The pollination work should be completed between 8 and 10 am. It is too late. The stigma is less pollen-receptive and it is not easy to set fruit.
V. Diseases and Insect Pest Control The diseases of greenhouse melon mainly include seedling damping-off, anthrax, downy mildew, gray mold and powdery mildew. The use of 0.5% potassium permanganate, 1000 times Pulic irrigation on the seedbed can effectively prevent damping-off. The spraying and spraying of 600-800 beradavim-manganese zinc or thiophanate-methyl on the seedbed or plant can control the occurrence and spread of anthracnose, downy mildew, gray mold, and powdery mildew. Insect pests mainly include aphids, cabbage caterpillars, and spotted lilies, which can be controlled by net, avermectin and other highly effective and low-toxic agents.
Linked greenhouse thin melon fruit spring cultivation
Linked sheds are connected by two or more large arch sheds. In Dingtao County, Shandong Province, the area of ​​single sheds is as small as 0.5 hectares and as many as 2 to 3 hectares. The shed has high land utilization rate, which is conducive to large-scale production, suitable for standardized operation, and good lighting and heat preservation performance. The greenhouse cultivation of thin-skinned melons can be marketed 40 to 45 days earlier. The yield per hectare of 667 square meters (1 mu) can reach 3,500 kg, and the benefit is 8,000 to 10,000 yuan. The social and economic benefits are very significant. The thin-skin cantaloupe melon cultivation technique is as follows.