Hello, teacher, this is a croissant. Tell me about the cultivation techniques of croissants.

First of all, you need to choose high-quality cantaloupe varieties, and you must buy those varieties with guaranteed quality.

2. Grafting and seedling raising

Open-field planting generally begins in the middle and late April, and greenhouse planting generally begins to raise seedlings every year 1 month, and it can be listed around May.

In a greenhouse with heating facilities, 50-hole trays were used to raise seedlings, and sowing was carried out in early October of 165438+ 10. Soak seeds in warm soup to accelerate germination. The seedling growth of Cucumis melo is weaker than other melon varieties. In order to ensure that the stem diameter of croissant is the same as that of rootstock, scion should be sown 13 ~ 20 days earlier than rootstock according to the temperature in the nursery shed. Before grafting, the night temperature in the shed can be appropriately reduced to promote the thickening of the melon stems.

Pay attention to the incision angle when pasting grafting. The angle is too small, the butt joint area of incision is small, and the grafting clip is not firm; The angle is too big, and the rootstock incision is too long, which is easy to be infected with diseases. Strengthen the management of temperature, humidity and light after grafting. About 30 days after grafting, when four leaves are United or five leaves are United, grafted seedlings can be planted.

Special attention should be paid to the use of three chemicals in grafting and seedling raising:

Spraying 1 drug with 750 times of 40% chlorothalonil suspension the day before grafting to control fungal and bacterial diseases;

For the second time, after the small arch shed was demolished, 600 ~ 800 times of amino acid nutrition medicine and 68.75% fluorine bacteria propamocarb (Yinfali) suspension were sprayed;

For the third time, the day before planting, spray 25% azoxystrobin suspension concentrate 1000 times to prevent plants from being infected with germs due to mechanical injuries in agricultural activities such as planting.

3, buckle shed membrane hanging canopy, skirt membrane

Use non-dripping, light-transmitting and heat-insulating polyethylene film, and tie up the shed 20 days before planting to improve the ground temperature. 5 ~ 7 days before planting, the crown is hung at a height of 2m, and the skirt film is hung around it.

Step 4 plant

Before planting, prepare the soil and apply sufficient fertilizer. Generally, an acre of land needs 3000 kilograms of farmyard manure for ridging cultivation. Generally, about 1800 plants are planted on an acre of land, and the planting is selected in sunny days.

When the ground temperature 10cm is stable above 13℃ for three consecutive days, choose a sunny morning for colonization. Drip irrigation pipe is laid on the inner side of the shoulder of the ridge, with the plant spacing of about 40cm and the spacing of 140cm. About 2,300 plants are planted per mu, and the planting water is poured. After the seedlings are slowly loosened, the height is covered with plastic film.

After planting, if the soil in Gua Tian is wet, you don't need to water it. When the seedlings grow to about 10 cm, water them once, and then water them in sunny days. When watering, it can be combined with topdressing, and the topdressing is potassium nitrate compound fertilizer. In general, Gua Tian needs about 5 kilograms of compound fertilizer per mu.

5. Tian Tuan management

(1) temperature management

After sowing, the ground temperature is low, so the greenhouse should be kept closed. Even if the temperature in the greenhouse exceeds 38℃ for a short time, outdoor air should not be released, so as to increase the ground temperature as soon as possible and promote the slow growth of seedlings. After delayed emergence, the outdoor air should be released in time according to the weather conditions, and the temperature should be kept at 21~ 28℃ for more than 8 hours every day and at 12℃ at night.

Uncover the insulation quilt after sunrise on sunny days, and uncover it early on cloudy days. On sunny days, when the temperature in the greenhouse reaches 30 ~ 32℃, start to ventilate with small wind, and close the vent when the temperature drops to 28℃ (generally at13: 00 ~14: 00); When the temperature drops to 22 ~ 23℃, cover the insulation quilt to ensure that the temperature in the shed is above 12℃ when the shed is opened in the morning.

Try to raise the temperature in the greenhouse on a cloudy day or the day before the cold current comes. As long as the temperature is not higher than 38℃, ventilation is prohibited during the day, so that the temperature can be maintained and stabilized in a high range. Use high temperature to improve soil temperature, and use high soil temperature to stabilize indoor temperature at night.

(2) Fertilizer and water management

After planting, 1 time slow seedling water can be watered according to soil moisture, and no watering will be done in the future. When the length of melon embryo is 12cm, choose sunny morning combined with watering, and apply 5 kg of potassium nitrate compound fertilizer per mu (n: p: k is 1 6: 22, the same below), and then water it every 7 ~ 10 days1times according to the situation, and water it every mu for 6 ~ 0 times.

In full bloom, apply 5kg of potassium nitrate compound fertilizer per mu, water it 1 time for 5-7 days, 8-9 m3 per mu each time, and stop topdressing 7-010 days before harvesting.

Hami melon Hami melon needs high water, so it is necessary to keep the soil moist in the field. Generally, water is poured once every other week, and the amount of water is slightly less than that in full bloom. Potassium nitrate compound fertilizer should be watered once every two weeks, and each time it needs about 5 kilograms. Water control should be carried out before fruit harvesting.

(3) Plant regulation

Single-vine pruning method is adopted. When the main vine is 30 cm long, the vine is hung, and when there are about 22 leaves, branch vines are selected from 16 ~ 19 leaves as fruit-setting vines, and 1 leaf is picked after fruit-setting, and 3 melons are left for each plant. When the 20th leaf is left,/kloc-0 will be selected.

After harvesting the second crop of melons, pull out seedlings every other plant, leaving about 1 100 plants per mu. Leave 2 ~ 3 striped vines at the top of the remaining plants, leave 80cm for coring, and leave melons at will after drying the vines.

(4) Remove the canopy and skirt film.

With the increase of outside temperature, the canopy and skirt film will be gradually removed in the first half of March of the following year to increase the light transmittance.

(5) Pest control

Remove diseased leaves and fruits in time, remove diseased plants, take them out of the field for burial or destruction, and reduce the spread of pests and diseases. Strengthen the prediction of pests and diseases, seize the early use of drugs for pests and diseases.

Physical control methods such as yellow insect trap and insect net are adopted. The main pests are whiteflies and aphids. 70% imidacloprid wettable powder can be sprayed, and the dosage per mu is 1 ~ 2g. Or use 10% isoprocarb smoke agent to control smoking, with the dosage of 300 ~ 400g per mu.

You're welcome. Happy Mid-Autumn Festival [smiling face]