Snow is the twentieth solar calendar of the Chinese lunar calendar. As the temperature drops, it gradually falls below 0°C, and the number of hours of sunshine shortens day by day, leaving everything in the open and losing its vitality and turning into severe winter. Agricultural fields in vegetable fields are mainly carried out in greenhouses, while the storage of winter vegetables is well done.

Storage of autumn vegetables

There are two ways to store a live cellar and bury it. Cabbage can be stored in both live and underground storage. When buried in soil, watering should be stopped 7-10 days before chopping. Try harvesting chopped vegetables as sunny as possible. Drying can be done in advance by digging without drying, and the thickness of overburden can be increased according to changes in outside temperature. Live cellar storage is better in the early evening. In the initial stage of the cellar, the vegetables are dropped once every 3-4 days. It is necessary to pour three times and adjust the temperature and ventilation to better manage the storage. For radishes, carrots, spinach, parsley and other vegetables stored by burial methods, 3-5 days ahead of storage trenches, when the outside temperature dropped to 0 °C when buried storage, after the gradual increase in the thickness of the cover soil according to the temperature decreases.

Do a good job of solar greenhouse insulation cold

1. Take scientific measures to improve the cold resistance of plants

The method of grafting seedlings is adopted: tomatoes, cucumbers, eggplants, summer squash and other crops are taken in the manner of grafting seedlings on rootstocks to enhance their ability to resist cold.

The use of variable temperature management to improve the cold resistance of the plants: after the seedlings were planted, the temperature-changing management method was adopted, ie low-temperature management one day, high-temperature management method on the other day, and the cold resistance was used to improve the cold resistance of the plants.

2. Strengthen the cold insulation of greenhouse

The suitable growth temperature of thermophilic crops such as tomato and cucumber is 23°C-28°C during the day, 15°C-18°C during the night, and 18°C-22°C in the ground temperature. Therefore, we must do everything possible to increase the indoor temperature. According to the thermal insulation performance of the greenhouse planted, early measures are taken to protect the weak insulation areas against cold and heat. The main points are the front roof, the south foot, the back slope, the back wall, the surrounding ground, the doorway, the rear window, and the vent. Cold insulation. Multilayer coverings can also be used in the shed to increase the temperature. About 40 centimeters from the roof in the shed, iron wire is used as a bracket, and a non-woven fabric or agricultural film is covered on the bracket, which can effectively prevent heat loss in the shed and reduce cross-flow heat dissipation. To master the principle of opening at night and opening during the daytime during sunny days.

Doing crop management in the shed

1. Adjust the appropriate temperature and humidity

Timely opening and closing tuyere to adjust the temperature and humidity, sunny days to maximize the temperature within the shed, strict control of the air release time, the morning with 23 °C -30 °C, 26 °C -23 °C in the afternoon, 15 °C -18 °C at night is appropriate. The indoor air humidity is adjusted according to different crops. Tomatoes and eggplants are suitable for 45%-60%; cucumbers and sweet peppers are suitable for 60%-80%. In case of overcast days, dry rice hulls, wheat bran, sawdust or other finely divided straws should be prepared in advance, and a layer of ground between the rows of crops should be used to absorb excess moisture in the shed.

2. Plant adjustment and fruit management

Plant adjustment: timely removal of side branches and lower old leaves, diseased leaves, and enhanced ventilation. Timely cultivating loose soil, increase ground temperature, increase soil permeability, and promote root growth.

To promote fruit setting and fruit thinning: Reasonably adopt the measures of flower spray and fruit protection, and use spraying agents such as "High Yield Agent No. 2" or "Fructoin" to control the product safety. When tomatoes are pollinated using bumblebee pollination or pollinator, they should ensure that the temperature in the shed reaches 15°C or more. Otherwise, other methods should be used to promote fruit setting. Remove excess fruit and malformed fruit as soon as possible. After the fruit matures, harvest it in time to avoid licking.

Scientific watering: Watering should be done on a sunny morning, and do not water on a cloudy or snowy day. Using watering methods such as drip irrigation, micro-spraying, or under-membrane irrigation can improve ground temperature and water conservation. Set a storage tank (or storage tank) in the greenhouse to increase the temperature of the irrigation water; do not use too much water at the time of watering, and use the principle of “water pouring for small water” and “see dry see wet” for water management. Minimize the air humidity in the shed. According to the weather, plant growth, watering methods and soil to determine the watering time and watering. Tomatoes and eggplants are usually driped for 4-6 days and watered once per mu, and the amount of water per mu is 3-5 squares. Membrane submerged irrigation is used to water once every 10-12 days, and water per mu is 10-12 squares. Cucumber, The sweet peppers are drip-irrigated every 2-5 days, and the amount of irrigation water per mu is 3-6 squares; the subsurface irrigation method is used to water every 7-10 days, and the amount of irrigation water per mu is 10-15 square meters.

Rational fertilization: According to the characteristics of the crop's fertilizer requirements and plant growth, topdressing can be done to achieve balanced fertilization of NPK and trace elements, with particular emphasis on the application of potash fertilizers, and the selection of liquid fertilizers that are easily absorbed is the best. Every 10-15 days, topdressing once, drip irrigation water each time topdressing "Christmas tree" and other water-soluble fertilizers 2-4 kg; under the film of dark irrigation water, each topdressing NPK fertilizer content of more than 40% of fertilization 7-10 kg. Every 10 days or so, the fertilizer is sprayed on the leaf surface, which can spray 0.3% potassium dihydrogen phosphate and trace elements such as boron, zinc, and copper. It can also spray "Rayleigh 2000" alginate and other functions. Fertilizer, with special attention to more spray on the back of the leaf.

Tomato Products

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