Key points of delayed cultivation of Pepper in Autumn in greenhouse

With the popularization of greenhouse, the cultivation area of off-season pepper is expanding year by year. However, people lack the technology to postpone the cultivation of pepper in greenhouse, so the yield is low and the benefit is poor. Greenhouse chili pepper is a vegetable that delays pepper production to the cold season in late autumn through facilities, and the "wrong season" market is often more beneficial. Li Yuhong, an associate professor at the School of Horticulture at Northwest University of Agriculture and Forestry Science and Technology, reminded that the management of autumn extension of chili peppers in greenhouse is higher than that of summer crops.

? Water and fertilizer management

After watering planting water and slow seedling water, ploughing and loosening the soil in time, cultivating soil and sealing ditch, squatting seedlings properly after cultivating soil and sealing ditch, promote the root system to develop in depth and reach deep roots and luxuriant leaves. At this time, if there is too much water and fertilizer, it is easy to cause the overgrowth of plants and the decrease of fruit setting rate. When the first layer of fruit reaches 2cm in diameter, the plant stems, leaves and flowers and fruits grow at the same time, timely watering and topdressing, and applying rotten human feces or urea. After fertilization, the soil should be ploughed in time, which can improve the soil permeability and improve the fertilizer conservation capacity of the soil. In order to prevent the premature senescence of the plant, it is necessary to harvest the lower fruit in time, strengthen watering, keep the soil moist and topdressing in time, so as to facilitate the plant to continue to grow and blossom and set fruit. Results in the later stage, the management of water and fertilizer should be strengthened, and topdressing and watering could alternately promote pepper fruiting and increase yield.

? Temperature management

Plastic film should be covered at the beginning of October, that is, buckle shed. When the temperature outside the shed is higher than 15 ℃, it can be released day and night. The better the ventilation is, the stronger the pepper plant is, the less the flower and fruit drop phenomenon is. In the first ten days of November, the greenhouse is no longer ventilated at night, and the shed is tightly fastened to protect against cold and heat preservation. If the temperature outside the shed drops below 15 ℃ at night, the growth of pepper is slow, and the fruit expansion is also slow. The greenhouse film and greenhouse door should be covered strictly at night, and the greenhouse temperature can only be kept at 20 ℃ ~ 25 ℃ in order to facilitate the expansion of fruit. At night, before the minimum temperature of the outside world drops to close to 0 ℃, the temporary arch shed should be buckled immediately to prevent cold and keep warm. If it is too late to buckle the small arch shed, you can use plastic film to cover the pepper plant with another layer to avoid freezing the plant and ensure the growth of young fruit. At noon on a sunny day, ventilation should be carried out in the leeward for a short time to remove harmful gases in the shed, supplement oxygen and carbon dioxide, reduce the temperature in the shed and reduce the occurrence of diseases.

? Ploughing, soil cultivation and pruning

The pepper growing in the greenhouse grows vigorously, the plant type is tall, and the branches are easy to break. In order to facilitate ventilation and light, the plant can be fixed horizontally with plastic rope or bamboo pole on the outside of the ridge to prevent plant lodging. The over-thin side branches and the old leaves and fruitless side branches in the lower part of the plant can be thinned to save nutrients and be beneficial to ventilation and light transmission. In the early stage of growth, combined with the removal of weeds, the middle tillage should be shallow rather than deep, and the depth is 5cm to 6cm. When the height of the seedling is about 30 cm, the middle ploughing can be deeper, and 10 cm is suitable. Cultivate the soil once before sealing the plant to prevent the plant from lodging.

In addition, attention should be paid to the prevention and control of diseases and insect pests.