Cucurbita pepo planted in greenhouse can be cultivated twice a year. Seeding and seedling raising in early spring can be carried out from 1 month to February, planting in late February to early March, listing in mid-late April and pulling seedlings in early June, which can be listed early to seize the market. Autumn and winter crops can be sown in late August, planted in late September, and harvested in early 1 1 month, which can be delayed until late April of the following year, occupying the market share in winter and creating better economic benefits.

I. Variety Selection and Seed Treatment At present, there are early green generation, black and beautiful, emerald and banana with yellow skin in large production area. Generally, 500 grams of seeds are needed per mu. Before sowing, soak the seeds in warm water at 60-62℃ for 10- 15 minutes, disinfect them, then soak the seeds at room temperature for 8- 10 hours, drain them, wrap them in wet gauze, and put them at 25-28℃ for 48 hours to accelerate germination.

Second, seedling technology 1, sowing. Firstly, the seedbed soil is prepared, and the proportion of nutrient soil for seedling cultivation is half organic matter and half fertilizer garden soil. Secondly, tray sowing, that is, fully mixed bed soil is put into plastic cups, after irrigation, each cup is sown with 1 germinated seeds, and the soil is covered with 20 cm thickness. In order to improve the ground temperature, the shed was buckled in advance and a hotline was laid on the nursery bed.

2. Seedling management. From sowing to emergence, the temperature is 25-30℃ during the day and 16-20℃ at night, and all seedlings can be produced after 3-4 days; In order to prevent the seedlings from overgrowth after emergence, the temperature should be lowered, and the temperature should be 20-22℃ during the day and 10- 12℃ at night, which can not only make the seedlings grow healthily, but also promote the differentiation of female flowers. In the late stage of seedling raising, the seedlings were exercised at low temperature, with the temperature of 18-20℃ during the day and 6-8℃ at night. When raising seedlings in plastic cups, we should master the principle of controlling temperature but not water. When the seedlings show drought, they should be irrigated, usually 2-3 times during the seedling raising period. In order to make the seedlings grow orderly, we should adopt the method of moving the seedlings upside down. The big seedlings should be placed on the south side of the greenhouse seedbed, and the smaller seedlings should be placed in the middle of the seedbed with better light and temperature. When the seedlings are inverted, the distance between seedling pots can be appropriately increased to make the seedlings neat and robust.

3. Strong seedling index. Plant height 15- 16cm, stem diameter 0, 4-0, 5cm, with 2-3 true leaves, short internodes, compact plant shape, well-developed root system and no pests and diseases. In order to achieve the target of strong seedlings, the soil lump should be large (10- 12cm), the seedling age should be short (the average seedling age is 30-35 days), and the temperature should be low (18-22℃ during the seedling raising period and 8-1at night).

Third, field management technology 1, soil preparation and fertilization. Cucurbita pepo has a well-developed root system and strong water absorption and fertility. Every 667 square meters, 3-4 tons of fully decomposed organic fertilizer and 20 kg of phosphorus diamine are applied, and the soil is turned twice, with a depth of 20-25cm. In the fertilization method, two-thirds of the organic fertilizer can be collected by combining centralized application with universal application, and one-third of the organic fertilizer can be applied in strips or holes. Then make a ridge with a width of 60cm, a width of 40cm and a height of 15cm, and then cover it with plastic film.

2. Post-planting management. In early spring, when the ground temperature of 10cm is stable above 8- 10℃. The temperature is stable above 3℃, and the temperature above 20℃ during the day is maintained for about 5-6 hours. Planting can be started in early February, with the row spacing of 1 m and the plant spacing of about 40 cm, and 2000 plants can be planted per mu. Choose "cold tail and hot head" in sunny morning.

When planting, the hole is opened and filled with water, sealed with wet soil, and watered again after 2-3 days; After the seedlings survive, choose sunny days and conduct furrow irrigation once. After irrigation, the surface will be dry, and intertillage the furrows once to loosen the soil. Autumn and winter crops should be planted in early September, and it should be done in cloudy afternoon. After planting, in order to prevent seedlings from dying due to high temperature, shading nets can be covered to prevent high temperature and strong light, so as to promote seedling delay.

During the flowering and fruit-setting period, the temperature is 20-25℃ during the day and above 15℃ at night; During the fruit expansion period, the daytime temperature is 20-23℃, and at night, 13- 15℃. In terms of water and fertilizer management, from seedling stage to flowering and fruit setting, intertillage is the main method to conserve water and control water and fertilizer, so as to prevent overgrowth or "crazy seedlings" caused by excessive soil water and fertilizer.

When the roots and fruits begin to swell, diammonium phosphate15-20kg should be topdressing every 667m2 in combination with irrigation, and topdressing should be carried out for the second time when the second and third fruits swell, and topdressing should be carried out with 20kg of urea every 667m2. Pay attention to the fresh air and dampness after irrigation and topdressing to prevent the occurrence of gray mold.

3. Keep flowers and fruits. When squash is planted in greenhouse, it is necessary to carry out artificial pollination. The method is: "Every morning at 6- 10, the male flowers are picked and the corolla is removed, and the stamens of the male flowers are gently smeared on the stigma of the female flowers, so that artificial pollination can be completed, and each male flower can be given 3-4 female flowers. Treating stigma and fruit stalk with 20x 10 -6 2,4-d or 60x 10-6 anticonvulsant can prevent melon from melting and promote fruit expansion. Spraying 0, 1% Sukening liquid on the stigma of young fruit can prevent gray mold from harming young fruit.

4. plant regulation

(1) hanging vine. Summer squash is planted in winter and spring for good ventilation and light transmission. Each plant is hung with nylon rope to make the plant grow upright.

(2) Pruning leaves. Cucurbita pepo is mainly composed of main vines, and the side branches should be removed as soon as possible; Cucurbita pepo has large leaves and long petioles, which are easy to shade. The diseased leaves, yellow leaves, residual leaves and old leaves should be removed as soon as possible, which can promote ventilation and light transmission and prevent the infection of diseases.

(3) update the pruning. In the late growth stage, the middle and lower leaves are aging, and the plant growth potential is weak. Therefore, the middle and lower leaves should be removed, and the upper 1-2 lateral branches should be selected to replace the main vine after topping.

4. Picking zucchini takes fresh and straight young fruits as products. When the young fruits reach 0.5- 1.0 kg, they should be harvested and put on the market. In particular, two fruits should be harvested early to prevent "seedling falling" and ensure high yield. After the young fruits are harvested, they are wrapped in fringed paper and boxed for listing.