Nine new measures for greenhouse wintering tomatoes
Isolation of the ground temperature inside and outside of the greenhouse Conduction at the intersection of the film and the ground on the outside of the front of the greenhouse, 50-60 cm wide, 1-2 cm thick, and the length of the foamed plastic sheet in the greenhouse are laid out according to the topography, which can effectively block the temperature inside and outside the greenhouse Conduction. The straw curtain is covered with film insulation. After the grass is placed on the curtain at night, the straw curtain is covered with a layer of polyethylene film. The width is equal to the length of the straw curtain. The length is equal to the length of the greenhouse, and the film is covered with sand. Bag compaction. This will prevent the rain, snow or fog from wetting the straw curtain and the ability to remove the snow from the snow and increase the temperature in the greenhouse by 2-3°C. Greenhouse hanging film reflective film hanging in the greenhouse north wall hanging aluminum reflective film, regardless of the cloudy day can increase the indoor light intensity, indoor temperature will be increased by 2 °C, and can improve the distribution of light, increase the sorghum tomato lower blade The light intensity of the fruit and the intensity of photosynthesis increase the effective accumulated temperature required for fruit color transformation. The operation line is filled with wheat stubble and then digging the soil slightly along the operation line, cultivating ridges to both sides, which can increase the area of ​​light, which is conducive to the growth of roots. The operation line is filled with 10-15 cm thick wheat straw or crushed straw, which is conducive to reducing the humidity inside the greenhouse, increasing the permeability of the soil, increasing the temperature of the ground, and increasing the concentration of carbon dioxide. Using aerosols and dust to prevent diseases and insects from overwintering and overwhelming, tomatoes are mostly caused by high humidity and low temperatures during the rainy days. Therefore, the premise of prevention is not to increase indoor humidity. The use of aerosols and dusts to control pests and diseases is effective, while not increasing the humidity in the greenhouse. The watering and fertilizing measures at low temperature shall not be watered as much as possible on consecutive rainy days. The watering shall be carried out at noon on sunny days, and it is preferable to use small water for irrigation. Fertilizer should not use chemical fertilizers, and it is best to use active biological fungi with water, and spray foliar fertilizer (active amino acid foliar fertilizer, boron fertilizer, calcium fertilizer, and potassium fertilizer), plus 1% glucose solution. To supplement the supply of nutrients under conditions of low temperature and low illumination, to reduce the occurrence of low-temperature physiological diseases. Remove excess leaves in time to remove diseased leaves, old leaves, yellow leaves, and lateral branches. Remove them from their bases and avoid leaving a small section. When the fruit grows to the green stage, all the leaves below the ripe fruit can be removed according to the tomato growth. Then spray a broad-spectrum fungicide, so as not only to prevent the old leaves consume nutrients, promote fruit enlargement, but also can promote plant ventilation and light, and help fruit coloring. Auxiliary pollination tomato is a self-pollination crop, fruit setting is greatly affected by environmental conditions, can take auxiliary pollination measures. Method 1: In the treatment of inflorescences 2 days before the inflorescence, under the condition of low humidity in the greenhouse, the vibrational inflorescence assisted pollination. Method two: During the cold season, the inflorescence may be pollinated 1-2 times per day after 9 o'clock on the sunny day. To promote the early listing of low-temperature cultivation of tomatoes is often due to a long color conversion period leading to fruit color yellow, poor storage. Spraying 2-3 times with “Red Fruit 88†is beneficial to fruit coloring, increase commodity rate, and can be listed 1 week in advance. China Agricultural Network Editor