For local vegetable growers to use soil seedlings in nursery, especially for soil seedlings in continuous cropping fields, it brings many problems of soil-borne diseases, or winter seedlings regardless of the season, the soil temperature is difficult to rise, etc., and it is difficult to meet the needs of breeding. Seedlings. This method uses the flue-cured tobacco floating nursery substrate developed by the Yunnan Tobacco Company (available from all over Yunnan) to build a simple nursery bed and a nursery nursery, which can produce higher-quality seedlings and avoid self-contained substrates. A series of problems caused by the detection of physical and chemical properties have led to lower production costs and can be free from time and space constraints. After seedlings are transplanted and planted, the nursery pool can be removed at any time. After several years of use, we believe that this method is a kind of soilless production technology that allows farmers to use high-quality seedlings, low investment, quick results, no restriction on seasons, and simple technology. . The introduction is as follows. 1, choose the right matrix The nursery substrate plays a role in fixing the root system, protecting the root system, and promoting the growth of the root system. It requires good matrix permeability and strong water retention. There is a certain degree of cohesion. Clean, pathogen-free bacteria, moderate pH, no toxic substances, can meet the nutritional requirements of flower seedlings in a balanced and lasting way. We use a special floating seedling substrate for flue-cured tobacco developed by the Yunnan Tobacco Company. After testing, the physical and chemical properties of the flue-cured tobacco meet the requirements. When loading the plate, first gently spray a small amount of water on the substrate while stirring, mix evenly, and put the humidity into the group, free fall can be dispersed. 2, the choice of plug At present, there are many types of plugs on the market in China. It is better to use a 72-hole, square-shaped plug with 50mm x 280mm inverted pyramid type. This shape of the hole is more conducive to the root development of the seedlings to the deep, fully developed, the root of the winding situation is also less, the hole in the medium uniform, easy to manage. 3, plate pressure hole Directly with the matrix into a pre-sterilized plug tray, the amount of filling should be sufficient. Use your finger to gently press the material on the surface of the material that has just been filled with a small amount of material, so that the phenomenon that the finger is pressed into one half cannot occur. Otherwise, the filling of the medium is insufficient, and after the water is poured, the substrate will sink and harden. Filler should be uniform. Otherwise, the hole will show uneven wet and dry phenomenon. Not conducive to seed germination and seedling growth. After filling, the substrate is leveled with a small wooden block. Then, on the plug of the re-assembled substrate, use a plate of empty seedlings to align downwards and evenly and forcefully, so that the substrate in the seedling tray is pressed down by 1cm, and then pressed hard with a bamboo stick of 1cm in thickness to make a 0.5 point. Cm deep holes, so that the matrix can be compacted 1cm, and a recessed 0.5cm deep hole in the center of each pocket can be used as a sowing position. 4, build beds, scaffolding, sand filling, watering In nursery sites where sprinkler irrigation equipment is provided, directly placing the pre-packed and treated seedling trays under the sprinkler heads can be done. In the nursery sites where there is no sprinkler equipment, plan to prepare the number of plugs used for sowing. Leave 10cm spacing between the plugs and establish a nursery pond. The height of the pool is 10cm. Surrounding bricks, membranes are laid, and bamboos are used to bend the arches. Shape, cover insect net (summer) or mulch (winter). Put the tray along the margins of 10cm and 10cm apart. Be careful to fill the gaps between the trays and the trays and sides with a clean river sand and water the ponds so that the height of the water is the height of the trays. 2/3, using infiltrated water absorption, 12 hours can fully infiltrate the substrate before it can be sown. 5, warm soup soaking, germination: The selected seeds are soaked in hot water at a temperature of 55-60°C for 15 minutes, while stirring, they are soaked and uniformly heated. After 15 minutes, cold water is added to bring the water temperature down to 30°C and dip for 4-6 hours. Seed the seeds a few times to remove the mucus from the seed surface. After 6 hours, pick up the seeds, dry them slightly, and wrap them in a towel or gauze, and germinate at a constant temperature of 28°C for 2-3 days until the radicle length reaches 0.5cm. Broadcast in the seedling tray. In the middle, it is necessary to wash the seeds with warm water every day to prevent the seeds from becoming rotten. 6, point sowing bud After germination, the seeds were sown in a seedling tray with tweezers. When sowing, pay attention to the seeds are laid flat and the radicles are down. Because the surface of the seed is mucus, it is easy to stick the glutinous rice dumplings. Pay attention to subconsciously hung the radicles of the seeds when they are hung in the holes in the bamboo sticks in the substrate. Each hole is sown. Seeds sprouted. 7, after the broadcast coverage Most crop seeds need to be covered after sowing. Meet the environmental conditions required for seed germination. Ensure its normal germination and emergence. Coverage should not be too small. Too little to lose meaning. The seeds will be uncovered. However, it should not be too thick or too thick to prevent the seed from being buried deeply, affecting the seedling emergence rate, which should be three times the seed diameter. Overlying the substrate, laying flat, gently compacting, and then covering the substrate with 1cm of river sand, gently compacting, can effectively prevent "wearing a cap unearthed." 8, post-broadcast management In the use of infiltrating substrates, watering is generally not required after sowing, keeping the bed temperature at 28-32°C during the day and 17-20°C at night. For 2-4 days, the seedlings can basically be released. Take care to check if there is a cap emerging and, if so, carefully peel the seed coat from both sides. The daytime bed temperature was 22-25°C after night emergence and 15-17°C at night. 9, prevent the leggy It is generally believed that high-quality plug seedlings should have a well-developed root system, a moderate height, timely flowering, and no pests and diseases. Apprenticeships are often the biggest problem in plant nursery, so they must be controlled and proficient. 1 temperature control In general, spring and winter in the post-emergence grasp at 18 ~ 21 °C. In the summer after the emergence at 25 ~ 28 °C. 2 Moisture is generally controlled at about 70% relative humidity. Relative humidity is too large, will make plug seedlings grow. Therefore, it is necessary to increase the temperature and enhance ventilation, and strive to reduce the relative humidity. 3 Increase lighting and maintain adequate lighting in the facility. 4 fertilizer. Fertilizer caused by the excessive application amount of nitrogen fertilizers leads to plant growth. Especially in cloudy weather. Ammonium nitrogen fertilizer makes the plug seedling grow weak. Nitrates of nitrates such as potassium nitrate and calcium nitrate make the plants grow robustly. Therefore, in winter, to control the height of plug seedlings, fertilizers containing low ammonia nitrogen are applied. At the same time for plug seedlings. The seedling period needs less nutrients and does not require special fertilizer. 5 chemical regulation. In addition to being controlled by the environment. The most direct method of controlling the leggy is to use growth hormones such as paclobutrazol, B9, but the use of the concentration should be strictly controlled. 6 For seedlings that are already leggy, they can be planted deeper on the implant and keep the cotyledons 2 cm above the surface. 10. Prevent pests and diseases timely The main diseases of melon vegetable plug seedlings are damping-off and blight, and the insect pests are mainly aphids and whitefly. To prevent and treat damping-off and blight, the general measures are to disinfect the substrate before sowing, control watering, release air after watering, and reduce air humidity. At the beginning of the disease, 800 mg of carbendazim or 800 mg of dexamethasone and 70% of dexamethasone were sprayed at 800 times. Aphid and whitefly use hanging yellow armyworm board or yellow slats (25cm4Ocm) (available in agricultural materials stores, the price is extremely low), 3O ~ 4O blocks / 667m2 excellent effect, because of its mobility, spray each The control effects of these agents were poor. 11, seedlings are planted Using infiltration seedlings, the roots develop rapidly and need to be seeded as soon as possible, appearing in the first heart leaf, and the cotyledons fully flattened to be divided into seedlings. After 2-3 true leaves, when the seedling height is 15-10cm, it can be planted in Daejeon. Plug cultivation is not subject to seasonal restrictions, roots are more robust, can be transplanted with fleas, there is no seedlings after transplantation, the survival rate is high, plants are robust, greatly shortening the nursery cycle, but also improve the propagation coefficient. It is an economical and environmentally friendly practical seedling raising technology and has a good application prospect. Vibrators For Women,Vibrator Dildo Vibrator For Women,Rabbit Vibrator Women,Vibrator Massager Adults Shenzhen Dongchen Hey E-commerce Co.,Ltd. , https://www.xxsexytoy.com