Grape management technology in greenhouse from January to March I. Greenhouse Film Management and Temperature and Humidity Control 1Sealing film for buckling shed The cultivation of single film mulching is usually sealed in the middle and late January, while the cultivation of double film mulching can be sealed from late December to early January.Cover the apical membrane first, then the envelope, avoid closing at the same time; double-film cultivation in the envelope after 15 days or so is preferable. 2Sleep breaking treatment The most important thing is to look at the ground temperature when to start using the relevant hypnotic agents, such as monocyanamide. 3Temperature and humidity control After mulching, the temperature should be in harmony with the ground temperature.In the first week, low temperature management was carried out. The temperature in the shed was controlled at 15-20 C in the daytime and 5-10 C in the night. In the second week, the temperature in the shed rose to 15-20 C in the daytime and kept 7-10 C in the night. In the third week, the temperature in the shed gradually rose to 20-25 C in the daytime and kept 10-15 C in the night.Slow heating up After germination, the suitable temperature for greenhouse should be 22-28 C in daytime, no less than 10 C at night and 60-70% humidity in greenhouse, 70% humidity in air and 70% humidity in soil during shoot growth period, no less than 10 C in night and no more than 30 C in day, 15-28 C in flowering period and 50-60% humidity in greenhouse. 4Management of greenhouse film When the temperature in the greenhouse is higher than 32 C, the skirt film should be raised to ventilate and cool down in time. When the temperature in the greenhouse falls below 25 C at 15:00 p.m., the skirt film should be put down for heat preservation; when the new shoots grow to 2 cm, the whole garden will be covered with plastic film; when the temperature in the greenhouse is above 30 C, the skylight should be opened to ventilate and cool down in time. When the humidity in the shed is too high and fogging, ventilation and dehumidification should be done in time to prevent the occurrence of rotten buds, rotten flowers and aggravated diseases caused by high temperature and humidity in the shed.Before the arrival of low temperature, the greenhouse should be closed as soon as possible, and cold-proof materials should be covered outside the greenhouse, or smoking and heating measures should be taken in the greenhouse to ensure the growth of branches and fruits. II. Management of Fertilizer and Water 1Watering PrecoatingFull irrigation should be carried out in greenhouse, i.e. mulching water. After mulching, timely irrigation should be carried out according to the soil and air humidity in greenhouse. The relative water holding capacity of soil should be maintained between 70% and 80% during the germination period, and the air humidity in greenhouse should be maintained above 90%. Budding stageThe whole garden should be irrigated once in time, that is to say, sprouting water should be irrigated to ensure that sprouting is neat; according to the soil moisture, small water should be irrigated regularly, and large water should not be flooded.After sprouting Shoot growth periodWater requirement is large, soil moisture should be controlled at 70%-80%, so as to avoid drastic changes in soil moisture. Irrigation of flowering water once according to soil moisture can keep soil moisture 60%-65% during flowering period. Excessive water during flowering period can cause a lot of falling flowers and fruits, unless the soil is too dry, it is not suitable to water during flowering period.10 days before the flower 2Fertilization From germination to flowering, the nutrients needed for grape growth are mainly stored in the past year.At this time, the leaf development is not mature and photosynthesis will not be carried out. There is no need to use mineral element fertilizer after germination. Fulvic acid fertilizer can be used to promote root growth. New shoots begin to growAfter topdressing, the weak leaves were sprayed with 0.2% potassium dihydrogen phosphate and 0.2% urea to promote the growth of branches and vines; 10 days before flowering, fruit fertilizer was applied, mainly nitrogen fertilizer, with appropriate increase of phosphorus fertilizer, 50 grams of nitrogen fertilizer + 200 grams of phosphorus fertilizer could be applied to plants, but orcha