As customers have higher and higher requirements for animal reproduction and animal disease diagnosis and treatment, traditional diagnostic methods such as visual inspection, stethoscope listening, thermometer inspection, and percussion and hammering can no longer meet the needs of animal husbandry production and veterinary clinics. Today, B-ultrasound is playing a big role in human medical diagnosis, and in the future, B-ultrasound will also play a role in animal medicine. We should promote the use of veterinary ultrasound scanner step by step according to the actual situation, popularize the knowledge of the use of veterinary ultrasound scanner, take this as an opportunity, and use it as a ladder to improve the level of veterinary practice in our country. Veterinary Ultrasound Scanner,Vet Ultrasound Scanner,Veterinary Ultrasound Machine,Veterinary Ultrasound Equipment Mianyang United Ultrasound Electronics Co., Ltd , https://www.uniultrasonic.com
Scientific seedlings are selected from the seedlings of black seed pumpkin seeds every other year as seed stocks, sown for 2 to 3 days before sowing, and soaked with 5 to 10 mg/liter gibberellic acid solution. The first seeding method is based on the method of sowing. After seeding, the difference between the two sowing dates is 4 to 5 days. After the plugging method, the rootstocks are sowed first and the scions are then broadcast. The difference between the sowing dates is 4 to 5 days. Pre-emergence greenhouse insulation, rapid seedling-promoting, the general temperature maintained at 25 to 28 °C during the day, kept at 18 to 19 °C at night. Immediately after the cucumber seedlings unearthed, the temperature of the shed was controlled at about 20°C to prevent overheating of the seedlings. The squash seedlings, on the other hand, had higher temperatures and could be maintained at about 30°C. When the seedbed is watered, it is necessary to pay attention to the weather. Do not water it before cloudy days, especially before the cloudy season of the cold season, to prevent rooting.
Grafting correctly Choose good-grown guava seed grafted on sunny days and operate in a place without wind and direct light. By the method of connection, the first true leaf half exhibition of cucumber, the rootstock cotyledon flat or 1 leaf 1 heart when grafting; plug method, 10 days after the rootstock sowing, scion after sowing 5 to 6 days, cotyledon flat grafting. The front scion and rootstock must be properly watered to increase the temperature at night, and the hypocotyls should be extended to 7-8 cm so as to avoid contact with the soil after colonization. Remove the cucumber and pumpkin seedlings from the seedbed, remove the true leaves of the pumpkin seedlings, and place a knife 0.5 to 1 cm below the cotyledon section. The blade and the two cotyledon lines are parallel and 30 to 35 degrees diagonally below the stem. One-third to two-thirds of the stem diameter, section length 0.7 to 1 cm, and then cut obliquely at 1.5 to 2 cm below the cucumber seedlings, angle of 25 to 30 degrees, the depth of stem thick three In two parts, the length of the knife edge is the same as the length of the scion. The two incisions are embedded in each other so that the cucumber cotyledons are pressed against the squash cotyledons and fixed with grafting clips. Immediately after grafting, it was planted on a seedbed. The roots of the scions were buried shallowly and separated from the roots of the rootstocks in order to remove the roots of the scion in the future, and the interface of the graft was kept at a distance of more than 3cm from the soil to prevent contamination. The grafting interface of each seedling is in the same direction so as to cut off the roots after survival. After planting, pour enough water.
The grafted seedlings managed to create a microclimate environment with high temperature, high humidity and weak light within 3 days after grafting, which promoted wound healing. In accordance with the principle of "no apparent wilting, soft touch" principle, ventilation and shading. Specific to grasp a few links. (1) Temperature. The suitable temperature for graft healing is 25 to 30°C. Avoid glare at night and cover the shading. Gradually increase the time for light exposure. After 7 to 8 days, no shading is required. (2) Humidity. After grafting, the relative humidity in the seedbed was kept above 90%. After 2 days, ventilation gradually began to change and the humidity was reduced. However, the humidity in the bed soil and the nutrient bowl should not be too high, so that the roots would not be damaged. (3) cut off the roots. 8 to 10 days after grafting, the color of the scion is green, the leaves are tender, and the roots can be cut off at noon. One day before the root cut, the scion was first pinched by the interface of the hypocotyls of the scion, and was cut at 0.7 to 1 cm below the interface the next day to prevent fracture healing. (4) In addition to rootstock side buds. After the rootstock cuts off the growing point, a large number of indeterminate lateral buds will germinate, which will directly affect the survival of the scion. The adventitious buds formed on the rootstock should be promptly removed. It usually starts 1 week after grafting and once every 2 to 3 days.
Greenhouse cucumber science graft promotion
Grafting seedlings is to graft the seedlings of the cultivars onto the rootstocks, and a new seedling is formed from the rootstocks of the rootstocks and the seedlings of the cultivars. Grafting of cucumbers in greenhouses not only improves the ability of plants to resist soil-borne diseases and pests and continuous cropping obstacles, but also improves stress resistance and yield, but the technology must be mastered to be successful.
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