The connection method is also called tongue connection. The scion and rootstock seedlings are made by cutting tongues under the cotyledons. After harvesting, the root buds of the rootstocks are removed and planted in a nutrient bowl (or in nutrition cubes). Each of them uses its own root system to absorb nutrients. After the grafted plants survive, the scion roots are cut off and become a grafted plantlet. Its specific operations should be carried out according to the following procedures:
1 Shed room preparation. Winter cucumbers, winter cucumbers, winter cucumbers, etc., are usually used to build grafted seedlings in indoor nurseries in winter, and about 15 days before sowing, the floor of the greenhouses should be leveled, enough basal fertilizer should be applied, deep soil preparation should be done, and irrigation should be done. Then the surface, the surface, the film surface, all kinds of building materials are sprayed sterilization. Immediately after sealing the greenhouse for ten days or so, the highest temperature in the greenhouse can reach above 60°C, killing various germs. For many years, the sheds that grow vegetables are planted in the soil before the high-temperature stuffy sheds are sterilized, or they are sterilized in combination with high-temperature stuffy sheds and smoke.
2 seedbed setting. Grafting cucumber to set 3 seedbeds. One is a cucumber sowing bed, the second is a pumpkin sowing bed with black seed pumpkin as the rootstock, and the third is a seedbed for planting grafted seedlings. Cucumber seedbeds and rootstocks pumpkin seedlings are built into east and west directions with widths of 120 cm and 7 cm above the ground. The length can be determined by the number of nurseries. The cucumber seedbed is best built near the entrance to the shed to facilitate ventilation. The pumpkin seedlings need high temperature, the seedbed should be built inside the shed. Grafted seedlings are planted in beds that are 150-200 cm wide and about 10 cm above the ground in a north-south direction, depending on the amount of seedlings. The nutritious soil of these three seedbeds should be mixed with 3 fertile sumtian soils and 1 decomposed manure, and 400-500 g urea and 5-6 kilograms of plant ash should be added to each cubic meter of nutrient soil. Into the shed room to build a bed.
3 seed treatment. The cucumber seeds were exposed to sunlight for several hours to accelerate the water absorption process of the seeds during soaking. The seeds were then soaked in water at 55°C. When soaking, keep stirring and keep stirring until the water temperature drops to 25°C. Use your hand to remove the mucus from the surface of the seeds and pour out the water. Soak it in warm water at 25°C for 6 hours. Then remove the seeds and place them in a clean gauze bag that has been scalded with boiling water. Cover the film and place it in an environment of about 25°C for 1-2 days. Wait until 70% of the seeds have exposed white buds (embryos, roots). When you are ready to sow. In order to prevent the occurrence of cucumber seedling damping-off, blight, and epidemic diseases, it can also be soaked for 6 hours and soaked with 72.2% Prolacacin or 25% metalaxyl WP 800 times for 0.5 hours. Germination. When soaking seeds in hot water, special attention should be paid to the amount of water not to be too much. It is advisable to submerge the seeds and keep stirring so as not to burn the bad seeds.
Seed soaking of pumpkin seeds, such as black seed pumpkin seed or No. 1 anvil, is basically the same as that of cucumber seed. The difference is that the time for soaking the pumpkin is 5-6 days longer than that of cucumber, and the soaking water temperature can be increased to about 70°C. The amount of water used is generally 3 times the amount of seeds. After the seeds are poured into hot water, they are stirred until the water temperature drops to 30°C. The mucus on the seed coat is removed and replaced with warm water at 25°C for 8-10 hours. The temperature of germination is 25-30°C, and the buds can usually be exposed after 36 hours. It is also possible to sow directly after sowing without the germination stage.
4 wrong time sowing. Different grafting methods require different seedling ages. After the emergence of cucumber, the growth rate is slow, and the rootstock grows faster with the pumpkin. To make the two kinds of seedlings reach the appropriate time for grafting, the sowing date should be changed. By the method of connection, cucumbers must be sown first, and cucumbers must be sown 5-7 days after sowing, which can make the two kinds of seedlings coarsely commensurate (that is, the thickness of the hypocotyls is similar), easy to graft, and the survival rate is high.
During the sowing process, soil pharmacy disinfection on seedbeds should be carried out. The method is to apply 50% seed dressing double powder 7g or 25% metalaxyl wettable powder 9g per square meter seedbed, add 70% mancozeb WP to 1g, mix fine soil 7-8 kg and mix well. Before the soil is sprayed with water to make the seedbed soil wet. When the sprayed water penetrates, take 1/3 of the well-mixed soil and spread it evenly on the surface of the seedling bed, and sow. Take a distance of 3 cm.
5-7 days after sowing of the cucumber, black seed pumpkin or anvil stock pumpkin should be sown. The sowing method is basically the same as the sowing of cucumber. The difference is that the bigger the pumpkin sowing density is, the better the purpose is to make the young stem (hypocotyl) of the pumpkin seedling grow thin and long, which is favorable for the grafting of cucumber seedlings in the next step. It is generally required that the length of the young stem of the pumpkin reach about 8 cm. Even if the nursery is built in the greenhouse, it needs the mulch film and then a small shed.
5 grafting time. When cucumbers reach 2/3 of the seedlings, they must peel off the mulch. After releasing the saplings, remove the coverings on the small sheds or open the vents in the greenhouses. Then cool the seedlings with ventilation to cool the bed to 23-25°C. The seedlings are stout.
The tools needed to pick up the cucumber seedlings should be prepared in advance on the day before grafting. The main tools include blades, bamboo sticks, graft clips, washbasins and clear water.
6 by the connection technology. The connection method is simple, practical, easy to operate and has a high survival rate. The specific method is: use bamboo sticks to remove the two kinds of seedlings, use pumpkin seedlings as rootstock, first remove the top of the pumpkin seedlings (tick with a thin bamboo sticky end), with a blade from the cotyledon section 1 cm below, since The knife was downward at a 45-degree angle. The depth of the oblique cutting was half of the diameter of the stem and was no more than 2/3. After the cut, it was gently held on the left hand, and then the cucumber was taken from the lower part of the cotyledonary node 1.5 cm from bottom to top. Under a 45-degree angle, the young stem is cut obliquely upwards and half deep. Then the two kinds of seedlings are docked to the incision and immediately clipped with a grafting clip and then transplanted into a grafting seedbed.
7 grafted seedlings planted. With a small shovel in the nursery grafted seedlings on the seedlings, according to the line of 10 cm to row, draw a 5 cm deep ditch, drenched water. When water infiltrates to 2/3, gently insert the two roots of the grafted seedlings into the soil at a distance of 10 cm. Fill the grooves with soil (cannot bury the grafting clips, and do not stick dirt and water at the edge). While planting, cover the shelter film and place a straw shade on top of the greenhouse.
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