1. Scion selection Scion should be selected from female trees that grow robustly, produce high yields, have good quality, and have no transmission pests and diseases. The selected scion should grow robustly, have abundant buds, annual head or secondary branch with a thickness of 0.4-0.6 cm. . After collection, it should be properly preserved and sealed. After the wax seal, the scion should be stored in a cold room with a temperature of 0°C to 5°C and a relative humidity of about 90%.
2. Grafting time and methods Spring branching is the best method for the replacement of winter jujube trees. Generally, two methods of connection are used: splicing and cutting.
The picking can be carried out within two weeks before the budding of the winter date tree. First cut the anvil at a distance of 5 to 10 centimeters from the surface, and the section should be flat. Then use a grafting knife to cut 2.5 to 3 centimeters of incision from the exact center and cut the scion into 2 to 3 centimeters. This is a double horse ear (thicker on the outside) and the base of the scion is cut. Near the triangle, the bud is located in the upper part of the narrow side of the wedge-shaped face. After the scion is cut, quickly insert the rootstock cracks so that the thick side of the cut noodles is aligned with the rootstock to form a layer, and the scion noodles are exposed 2~3mm outside the mouth, that is, slightly white. After grafting, the grafting site and the scion incision are tightly wrapped with plastic strips, which not only evaporates moisture, but also fixes the scion.
The skin graft can be carried out after the sprout of the winter jujube tree until the end of May. When grafting, cut the rootstock on the appropriate site (5 to 10 cm from the low ground and 2 to 4 cm thick from the grafted graft) and plunge from the bottom up with a pruning shear to reach the xylem. Open the skin, a triangular rift. Then, at the lower end of the scion, 2 to 3 cm, incline and incline a 2 to 3 cm long single slope, which is a horse-shaped shape. The base section of the noodles is nearly in the shape of a “1†shape. Insert the noodles into the xylem of the rootstock and insert the rootstock gently. Cortex can be. The top of the inserting noodle is slightly white. The lashing method is the same as the tying method.
3. Management after grafting Because the nutrients are relatively concentrated, some sprouts will be produced at the base of the rootstock. To ensure that the nutrients absorbed by the root can fully supply the growth of the scion, the sprouting should be maintained for 3 to 4 days, and 2 to 3 times can be removed. . In the grafting process, the second branch was selected as the scion, and one part of the scions survived and grew directly into the date head, while the other part sprouted and grew into the date hanging. As long as all 0.5 cm from the base is cut off, it usually takes about 7 days to grow the dates. In spring there are often strong winds. When the grafted seedlings grow to 20 cm in length, the grafted seedlings produced by the skin-splicing method should be tied with a wooden stick or bamboo pole in time and the new shoots should be tied and fixed in an appropriate manner to avoid wind deflection. . Tied support must be continued for two years and checked at any time. Pick-up seedlings generally do not need to tie. When the grafted shoot grows to 8-9 secondary branches, it is picked up to promote secondary branch growth. After grafting, the jujube tree is young and young, which is very vulnerable to pests and diseases. In the germination stage, spraying 1 to 2 times 25% Diflubenzuron No. 3 2000 times, can effectively prevent and control juvenile Mosquitoes. When grafted seedlings survive, they thrive, require large amounts of fertilizer, and should be topdressed and watered in time, and should be cultivated and irrigated after watering. Pay attention to checking the status of scion survival in a timely manner. If there are no living scions, make timely adjustments.
A Soxhlet extractor is a piece of laboratory apparatus[1] invented in 1879 by Franz von Soxhlet.[2] It was originally designed for the extraction of a lipid from a solid material. Typically, Soxhlet extraction is used when the desired compound has a limited solubility in a solvent, and the impurity is insoluble in that solvent. It allows for unmonitored and unmanaged operation while efficiently recycling a small amount of solvent to dissolve a larger amount of material.
Unimedsume Trading Co., Ltd , https://www.ums-labmed.com