Li Dongcai cold-ripening fertilizer materials pay attention to more

Chinese Cabbage and Radish Harvesting

As the saying goes: "If you don't cut vegetables, you must suffer." Chinese cabbage must be chopped and harvested in time before being frozen. Heading south and drying for 2 to 3 days, it will be sold and refurbished. After freezing, it can be used as a protection against freezing. It can be stored in a circular pile on the inside and out of the head. When the outside temperature is lower than 0°C, it is stored in the pit. Radishes and carrots should be harvested before the frost arrives. Twist the rice dumplings, cover them with tweezers, ensure they are not frozen and heat, dig up the storage pits in advance, and store them in the pits from November 15 to 20; open celery, rape, and Vegetables, parsley and other leafy vegetables should be harvested before and after the winter to prevent freezing.

The greenhouses do a good job of pulling and harvesting

Tomatoes, cucumbers, peppers, eggplants and other thermophilic crops grown in autumn greenhouses should be pulled in time, and the unripe tomato fruits can be stored in the greenhouse for ripening; for cold-resistant cabbage, spinach, lettuce, rape and other crops to do Good insulation and cold-proof measures, close the air inlet and doorway, cover the 1-meter-high grass curtain or old insulation around the booth at night, and keep it warm in the best commodity period.

Solar greenhouses strengthen cold insulation

For greenhouse door, window, back wall, rear roof, etc., where thermal insulation is weak, heat insulation and cold-proof measures should be taken early. The rear window and exhaust fan are sealed with foam boards, straw curtains and other materials; the curtains are installed at the entrance, and a 5-meter-long windshield is set at the entrance of the greenhouse; the cold-proof channels are filled into straw, leaves and other insulation materials in time. In the shed, the front roof is covered with a 100 cm-high agricultural film to prevent cold; the overlying roof is covered with 2 or 3 layers of straw or old insulation; the back wall is used for soil or old straw to increase insulation. Sex, two layers of agricultural film or non-woven fabrics are set in the shed at night.

Warm vegetables increase light and cold vegetables in batch sowing or planting

Greenhouse lettuce, rapeseed, spinach, capsicum, cherry radish, fennel, buckwheat and other fast-growing leafy vegetables and root vegetables can be seeded or planted in batches to supply the winter market one after another. Among them, spinach, fennel and cherry radish are directly sowed; lettuce, rapeseed and capsicum are transplanted by seedlings. For crops such as celery, radish, cabbage, cauliflower, etc. during growth, proper management of environmental conditions, cultivating loose soil, topdressing, watering, pest control, etc. must be done.

For greenhouse grown autumn tomatoes, cucumbers, eggplants, sweet peppers and other autumn and winter eel warm crops, to adjust the appropriate temperature, light, air humidity and other growth conditions, in particular, to increase the light, the film should be often scrubbed and cleaned, increased Transmittance; To timely ventilation and ventilation, strengthen pruning, auxiliary pollination, sparse fruit thinning, scientific fertilizer, watering, timely control of pests and other management, to promote plant growth robust, multi-results, fruiting results.

The overwintering winter spinach, shallots and other overwintering roots and leeks are used to freeze the water and cultivating loose soil. The frozen water is best suited for the timing of “freezing and freezing at night” (that is, freezing in the ice at night and opening during the day). After thawing the frozen soil, the cultivator loosens the soil and forms cracks on the surface to ensure safe wintering of the seedlings.

Shed room vegetable flush fertilizer seven attention

First, the use of less volatile or less volatile fertilizer for ground flushing. The amount of ventilation in the shed is relatively small, it is easy to collect harmful gases, and harmful gas poisoning occurs. Therefore, volatile fertilizers should not be used for ground flushing.

Second, the application method should be appropriate. When fertilizing fertilization, the solid fertilizer should be dissolved into water in advance to make it into mother liquor, then flush with water (organic fertilizer should be used for 10 days in advance, and the supernatant should be flushed with water). Do not directly spread chemical fertilizers, and then water irrigation facilities, so as to avoid uneven fertilization, local concentration is too high, the phenomenon of burning root.

Third, the fertilizer concentration should be appropriate. The amount of water used for fertilization is generally large, and fertilizer is highly diluted when fertilized. If the amount of fertilizer is insufficient, if the fertilizer concentration is too low, the fertilizer efficiency will be poor, and the effect due to fertilizer will not be achieved. If the fertilizer is excessively large, or if the amount of water used for fertilizer application is insufficient, the concentration of fertilizer solution is too high, then the burned root is prone to occur. . For volatile fertilizers, when the concentration of fertilizer solution is too high, the amount of harmful gases that volatilize into the air is relatively increased, and the chance of harmful gas poisoning also increases. Generally speaking, when watering with the normal amount of water, the solid fertilizer can be applied at about 120% of the conventional amount of surface fertilizer. After the liquid fertilizer is mixed with the fertilizer solution, the water is slightly cloudy. The special flush fertilizer sold on the market can be carried out according to the instructions.

Fourth, the amount of water should be appropriate. When flooding fertilization, flooding should not be flooded to avoid or reduce the loss of nutrients in fertilizers. However, it is also not possible to water too little to prevent fertilizers from being excessively high. The specific amount of watering should be determined according to the type of soil, the type of cultivation, and the period of vegetable cultivation. The proper amount of water is that after watering, the water will be able to wet the soil in the main distribution area of ​​the root system. Can be inserted into the ground after the watering with a wooden stick, check the wet conditions of the soil to determine the appropriate degree of watering.

Fifth, pay attention to balanced fertilization. Some peasant friends looked for a fertilizer and used it as a "universal fertilizer." This resulted in excessive use of a single nutrient and physiological disease in the vegetables. The correct method is to balance the fertilization and alternate application of various fertilizers according to the different stages of growth and development of vegetables.

6, pay attention to prevent gas after fertilization. In winter, the greenhouse is closed for a long period of time. If no attention is paid to ventilation after fertilization, indoor sheds tend to accumulate harmful gases, which may lead to gas damage to vegetables. Therefore, in the winter when it is cloudy, care should be taken to avoid the use of unfamed chicken manure and fertilizers with high nitrogen content. Bioorganic fertilizer can be applied to strengthen the root system. In addition, when it is necessary to top-dress the vegetables during the latter part of the growing season, you can choose to have a fine sunny morning and catch a small breeze after dressing. In the event of gas damage, prompt remedial measures should be taken: First, loosen the soil and strengthen ventilation so that harmful gases can be emitted to the shed as soon as possible, and the wind should be properly ventilated even on cloudy days, released sooner or later, placed at noon, or placed at low temperatures. Put it at high temperatures. The second is to spray plant growth regulators to promote the recovery of damaged crops as soon as possible.

Seven, red fertilization should not be commonly used. Excessive fertilization and excessive fertilization will cause adverse phenomena such as soil compaction, rooting, and wilting of vegetable crops in greenhouse vegetable plots; nitrogen fertilization and potash fertilizer are the main reasons for fertilization, phosphorus content is low, and trace elements such as calcium and magnesium are minimal. Balance; Fertilization effect is limited to the soil surface, with mulching, shed indoor temperature is relatively high, a large number of surface roots, if you encounter low-temperature cold flow or with some inferior fertilizer, often prone to burning root phenomenon, causing rot . In addition, misuse of fertilized fertiliser can also lead to lengthy vegetables, reduced quality, reduced fertilizer utilization, and exacerbating soil salinity in greenhouses.

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