First, scientific and efficient management of water
1, pay attention to grasp the irrigation time: the winter greenhouse watering is generally selected sunny, should not be in cloudy snow days; day should be selected in the morning, generally should not be in the evening. Otherwise it will cause the humidity in the greenhouse to be too large and cause disease. Watering should not be selected at noon, so as to avoid high temperature watering affecting the physiological function of the root system.
2, pay attention to control the irrigation water temperature: the winter greenhouse irrigation is suitable for the direct irrigation of underground well water, irrigation water temperature is best not less than 2 ~ 3 °C, avoid direct use of river water, reservoir water and cold water irrigation in the pond. Planting vegetables in winter is best to use warm water at 20~30°C.
3, pay attention to grasp the amount of irrigation water: greenhouse vegetables, a serious shortage of water will lead to wilting and leaf scorch, too much moisture due to soil oxygen can easily lead to root rot suffocation, aboveground stems and leaves yellow and even die. In winter greenhouses, the irrigation temperature is low, the amount of air to be blown out is small, and the water consumption is low. Therefore, it is necessary to use small water for irrigation. The amount of water must be consistent with the degree of crop water consumption and soil evaporation as well as the degree of patience of the crop root system, neither excessive nor water shortage.
4. Pay attention to the selection of irrigation technology: Micro-irrigation can effectively control the air humidity in the shed, reduce the occurrence of pests and diseases, and maintain effective light and heat resources; micro-irrigation can also effectively control the amount of water, reduce soil deep leakage and fertilizer loss, and improve soil structure. And ventilation, promote crop growth and development. Therefore, it is better to use micro-irrigation in greenhouse vegetables.
5, pay attention to strengthen post-irrigation management: irrigation day, in order to restore the ground temperature as soon as possible, generally closed greenhouse to quickly increase the indoor temperature. After the ground temperature is raised, the crops that prefer air drying should be ventilated in time to reduce the temperature to a suitable range. Many times of cultivating should be carried out. When the seedling grows up, the cultivator will easily hurt the roots and it is generally no longer cultivator.
Second, safe and efficient fertilization
The safe and efficient fertilization of greenhouse vegetables should have the following five technical aspects:
1, farmyard fertilizer to maturity. Greenhouse vegetables should be fully cooked when applying farmyard fertilizers. Because there is no decomposed farmhouse fat and bacteria and eggs, it is easy to spread the disease after it is applied to vegetables. In addition, if the farmhouse fertilizer is put into a greenhouse and then decomposed, ammonia burning burn vegetable seedlings will be produced. Therefore, the farmyard fertilizer must be fully decomposed and then fertilized.
2, fertilization method should be scientific and reasonable. The base fertilizer is best applied one week before the colonization of vegetables. And mix well with the soil. Fertilizer can be planted 7 to 10 cm away from the plant ditch or hole chase, top dressing immediately after top dressing, watering, do not sprinkle fertilizer directly on the ground or plants, so as not to volatilize fertilizer or burn vegetable seedlings. The top-dressing fertilizer should be in the peak season of vegetables and vegetables, and finally in the cloudy or late evening. The fertilizer should be sprayed on the back of new leaves and leaves to facilitate the absorption of vegetables.
3, the amount of chemical fertilizer should be appropriate. Since fertilizers in greenhouses are not easily lost, excessive application of chemical fertilizers can cause an increase in the concentration of salts in the soil, which can affect the normal growth of vegetables and cause secondary salinization. Therefore, fertilization before fertilization, formula fertilization must not be blindly applied.
4, the application of trace fertilizer should be appropriate. Although the demand for trace element fertilizers on vegetables is small, its role in the metabolism of vegetables is very great. The commonly used micronutrients include boron, molybdenum, zinc, and iron fertilizers. Micro-fertilizer is used as base fertilizer and can also be used for seed dressing, soaking or top dressing. The range between the appropriate amount of fertilizer and excess fertilizer is relatively narrow, so the amount must be accurate to avoid causing fertilizer damage.
5. Use plant growth regulators properly. The use of good plant growth regulators will promote the production of vegetables. However, each regulator has a certain range of conditions and scope for its application. In particular, it is necessary to grasp the time and concentration of use, and it cannot be sloppy, otherwise it cannot achieve the effect of increasing the yield of vegetables.
Third, safe and efficient killing
1. Disease prevention and treatment
(1) Dust application
This method saves labor, labor, and medicine, and distributes the powder evenly. The commonly used pharmaceutical agent is 5% chlorothalonil compound powder, with a dosage of 1000 grams per acre/667 square meters, sprayed in the morning or evening, and administered once every 7~9 days.
Continuous application of 2 to 3 times, can effectively control cucumber downy mildew, anthrax, black spot disease, powdery mildew and tomato gray mold, early and late blight.
(2) Fumigation of aerosols
This method applies a uniform, high-efficiency, low-residue pesticide and requires strict sealing of the greenhouse. The commonly used fog agent is 45% chlorothalonil aerosol, 200-250 grams per acre / 667 square meters dosage, 7-10 days fumigation once, 4 to 5 times throughout the growth period, against cucumber downy mildew , powdery mildew, pathogenic bacteria and tomato early and late blight, gray mold, leaf mold, etc. have special effects.
(1) Spray control
1 For fungus downy mildew, epidemic disease, anthrax, powdery mildew, etc., 75% chlorothalonil or 64% antiviral MA, 25% metalaxyl wettable powder 500 times, 7~10 One day spray, even spray 3 to 4 times.
2 For bacteria caused by bacterial leaf spot, disease, etc., 70% chlorothalonil wettable powder 500 times, or 0.3% agricultural streptomycin 20010-6, 30% DT bactericide 300 times in the early stage of disease. Spray, control effect is above 90%.
(3) Toxic disease and squash virus disease caused by pathogens, based on the elimination of aphids, migratory locusts and other transmission insects, in the incidence and before the onset of treatment with 20% of the virus A wettable powder 500 times spray control.
(3) liquid irrigation
For the blight and verticillium disease transmitted by soil, rain, seeds, etc., 50% carbendazim wettable powder 400 times, or 70% thiophanate-methyl wettable powder 800 times, can be used for prevention and treatment. 200-250 ml per strain of irrigated liquid was irrigated once every 10 days for 3 to 4 consecutive times.
(4) Soil treatment
Regardless of the land on which the recommended conditions are applied, the soil is treated with chemicals before sowing or planting of vegetables, which can effectively control Sclerotinia, Blight, Verticillium wilt. Per square meter with 40% pentachloronitrobenzene or 25% carbendazim wettable powder 10 grams, mixed fine soil 1000 grams, sprinkled into the soil surface or into the soil.
2. Pest control
In recent years, with the large-scale development of greenhouse vegetables, late autumn, deep winter and early spring greenhouse vegetables have become the wintering hosts of the white planthopper. The white tadpoles have occurred for about 10 generations a year, and they have been jeopardized on an annual basis. The hosts are widespread, breeding rapidly, overlapping in generations, alternately with each other, and drug resistance is increasing year by year.
White tadpoles gather adults and nymphs to suck sap on the northern side of the vegetables. The density of the larvae is small, and when the damage is light, dense white spots appear on the leaves, and when the leaves are severe, the leaves become dry. The secretory secretory secretions accumulate on the foliage, which often leads to the occurrence of mildew diseases and the spread of viral diseases, reducing the commercial value of vegetables. In the prevention and control of the planthopper, we summarized five effective methods for prevention and control.
(1) Purify the environment and reduce the base number. Bai Feiyi likes to eat vegetables, especially eggplant, melons, and beans, and does not like cruciferous vegetables and onion and garlic vegetables. In order to reduce the source of insects, crops or vegetable varieties that White Deaf Do not like should be selected around the greenhouse in order to purify the surrounding environment and reduce the overwintering base.
(2) Clean the countryside and burn it deeply. The residual vines after the harvesting of the vegetables in the sheds and sheds and the fallen leaves on the ground shall be cleaned and buried deep away or burned away from the shed to prevent them from moving in the immediate vicinity and avoid stacking around the sheds. Whitefly can withstand 0°C freezing. Therefore, the stems in winter are far away from the greenhouse and must be deeply buried and incinerated.
(3) Prevention is the main use of protective nets. After the shelter is covered, insect-proof nets are used at the entrances and exits to prevent people from entering and leaving the shed to ventilate and attracting a large number of adult white hoppers to fly into the shed.
(4) Dew Locust, yellow trap. As plastic fabrics continuously release toxic gases, ammonia, nitrous acid, and carbon monoxide are constantly generated in the sheds. Therefore, condensation in the sheds in the morning has a certain degree of toxicity. Therefore, after opening the haystack in the morning, do not let go of the wind. Instead, beat the plants and drove Bai Feiyi to fly and stick to the roiling dew.
You can also use the white locust to the yellow tropism, use 3050 cm thin wood nailed on the stick, coated with yellow paint, dried and coated with No. 10 engine oil, inserted in the plants, trapping and killing white fly cricket, wooden sticks omitted Above the plant, 2 pieces per 50 meters.
(5) Dew condensation prevention and improve the effect. To prevent and control whitefly, it is necessary to prevent and control the plant before the air is released in the greenhouse in the morning. When the leaves of the plants are wet, the whitefly is not easy to migrate and the nymph is not easy to jump. It is a good opportunity to prevent and cure the drug. The commonly used pesticides are 98% of Bataan, 90% of Braun WP or 10% of imidacloprid and other pesticides 2500-3000 times spray control, each time 7 days, alternating medication, continuous medication 3 times, vegetables in Drugs were stopped 15 days before harvest to prevent excessive pesticide residues.
We mainly export European Chinese onions, garlic and ginger.
Fresh yellow onion and red onion size 60-80mm 70-90mm 90-110mm 10kg/net bag, 20kg/net bag or 25kg/net bag (2019 new crop onion)
Peeled yellow onion and red onion size 60-80mm 70-90mm 90-110mm 10kg / box, 20kg / box, filled with nitrogen, storage time of 90 days.
Frozen onion, frozen onion cube, frozen onion ring 10kg/box or 20kg/box Save for 2 years.
We also offer garlic, ginger and peeled garlic
Our onions have been sold in the Netherlands, the UK, Poland, and Italy, and the quality is very good.
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