Adjusting the temperature and increasing the illumination of the zucchini after colonization should be maintained at 25°C~30°C during the daytime and 18°C~20°C during the night to promote easing of seedlings. The temperature should be appropriately reduced after easing the seedlings, and it should be controlled at 20°C to 26°C during the day and 12°C to 15°C at night to promote the robust growth of the plants. After the melons are properly raised, the temperature is maintained at 25°C to 30°C during the day and 15°C to 20°C at night. Increase the temperature difference between day and night to facilitate the accumulation of nutrients and the expansion of melon, in the case of maintaining the temperature within the shed, pull the straw sooner or later. In the rainy days, fluorescent lights should be turned on and light curtains should be hung. At the same time, photosynthetic fertilizer should be applied.
Strengthen the management of fertilizer and water When the root melon is 10 centimeters long, pour the first water, apply 25 kg of compound fertilizer per acre with water, and pour the first water 15 to 20 days later, and combine top dressing with watering. Watering is generally performed on a sunny morning, and it is not poured on cloudy days to prevent lowering of the greenhouse temperature and aggravating the disease. In addition, due to the low winter temperature and low ventilation, carbon dioxide fertilization can be managed.
Artificial pollination of squash is a dichogamous and pollinated crop, artificial pollination must be carried out under greenhouse cultivation conditions. Method: Every day from 9 to 10 o'clock in the morning, take the male flowers that are open on the day, remove the corolla, and gently apply the stamens of the male flowers to the stigma of the female flowers to grant pollen. Each male flower can grant 5 female flowers. Applying 20 ppm of 2,4-D to the female stigma or flower stalks at the same time can increase fruit setting. In addition, when the plants have too many flowers, they should be properly sparse so as to ensure the normal fruiting of the plants.
Hanging vines pruning against creeping zucchini, after planting saplings, at the top of each squash squash shed, along the north-south to pull the thin wire, and then fasten at the base of the stem, and then grow with melon vines, the melon vines tied in the hanging Rope can be. When the length of the vine spreads close to the roof, the collection of the lower melon should be promptly settled, and the lower old leaves should be removed to facilitate the prevention and ventilation. It is necessary to remove lateral buds in time to ensure the growth of the main vine.
Prevention and treatment of pests and diseases in greenhouses West cucurbits are mainly viral diseases, gray mold, aphids and whitefly. The virus is mainly prevention, eliminates the transmission of poisonous insect pests, and can be used to prevent and control the virus in the early stage of the disease. Virus mold is used to prevent and control the botrytis cinerea and moldy spirit; the powdery mildew can be controlled by sulfur rubber suspension; Can be used to control the carbuncle No.1, whitefly can be used imidacloprid, bufalin or yellow trap control.