Temperature and humidity control In winter, in order to reduce heat loss, increase temperature and soil temperature, the shed film should be as tight as possible. Temperature is the main factor, and it is flexible according to the external climate conditions.
If the air humidity in the greenhouse is less than 50%, it directly affects the photosynthesis of pepper and the absorption of mineral nutrients. When the air humidity in the shed is greater than 70%, it will cause long peppers, and it is beneficial to the germination and infection of various pathogen spores. , causing the disease to become epidemic. Therefore, ventilation should be carried out to promote the exchange of high-humidity air in the shed with low-humid air outside.
Reasonable close planting will be ploughed and sun-dried in time before harvesting, applying 2-3 tons of decomposed farmyard manure per acre, one pack of compound fertilizer, and one pack of calcium as base fertilizer. The reasonable planting density of pepper is 50-60 cm in row spacing and 30-40 cm in plant spacing. It is planted in a single row and planted about 3000 plants per acre.
Field management
1. Temperature: no ventilation within one week after planting, mainly for heat preservation, the growth temperature of pepper (sweet pepper, crispy shell) is 20 °C-25 °C; the night temperature can not be lower than 10 °C, the temperature rises, the seedling period is exposed Membrane ventilation time is 9-10 points, and the cover film should be closed after 15-16 pm.
2. Moisture: Capsicum is more resistant to drought and is not resistant to drought. To obtain high yield, it is necessary to strengthen water management. If the drought occurs during the flowering period, it should be timely irrigated to keep the soil moist.
3, topdressing: (1) light application of seedling fertilizer: after planting survival, 1000 kg of human excrement per acre, or urea 5-6 kg, combined with cultivating irrigation. (2) Stabilize the application of flower bud fertilizer, appropriate application of phosphorus and potassium fertilizer, and promote multi-branch results, applying 15-20 kg of urea per acre, 10 kg of calcium and 10 kg of potassium sulfate. (3) Re-application of flower and fruit fertilizer: combination of nitrogen, phosphorus and potassium fertilizer, 2000 kg of manure per acre, 15-20 kg of calcium, 15 kg of potassium sulfate, 20-25 kg of cake fertilizer or 2 kg of compound fertilizer plus 2 kg Zinc sulphate, hit the pond, water after the application, pay attention to the root of the plant 8-10 cm, so as not to burn roots, or the fertilizer directly contact the rhizome to cause rot.
Pest control for growing greenhouses for most of the time, especially in winter, provides suitable environmental conditions for the wintering and reproduction of pests and diseases, which will make vegetable pests and diseases increasingly serious. Therefore, the prevention and control of pests and diseases is the key to the success of greenhouse cultivation of vegetables.
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