Seabuckthorn has strong ecological adaptability and is resistant to high temperature, drought, salinity, indulgence, and sand burial by wind erosion. It is the first tree species in China's “Three North†region to maintain water, soil, wind, and sand. The application of all-optical auto-spraying device will briefly summarize the technical points of the tender branch cuttings of seabuckthorn seedlings for reference.
Seed setting
Select leeward sunny, no building or tree shading, high terrain, near the water source, power supply place according to the length of the double-arm length circle set the seedbed, around the brick into a ring, in order to facilitate the operation, the middle of the bed laying brick Road, width 35 cm. In order to maintain the permeability of the seedbed, 10 cm thick river pebbles are laid on the bottom of the seedbed, 10 cm of coarse sand is covered in the middle, and river sand is 10 cm to 15 cm in the upper layer. After the cuttings are sprayed intermittently, the seedbed can have sufficient moisture while maintaining air permeability, while the sand layer has enough oxygen for root development. Our all-optical automatic spray device is a double-arm rotary scanning sprayer and a digital display automatic control instrument produced by the Chinese Academy of Forestry.
Gutters need to be repaired around the seedbed to prevent bed area water from affecting the survival rate. Also set up wind barriers around.
Cutting seedlings
Establish a good seed harvesting garden before cutting, which is the basis for improved breeding. Whether or not cutting shears are appropriate is the key to the success of cuttings. In general, the overall requirement for cuttings is that the shoots are in the semi-lignification stage (soft, continuous, easily peeled, with xylem inside).
The effect of cloudy strips is best. The specific time should be cut in the morning or after sunset. The survival rate is high in the top and middle branches of the crown, the growth of the seedlings is large, and the quality is good.
The tender branches cut from the mother tree are susceptible to dehydration and wilting, and a large number of shoots piled together are prone to hot flashes and affect rooting. Therefore, after cutting the twigs, they must be bundled with the bundles and transported immediately to the cool place for moisturizing. If the strip is taken far away, the twigs collected shall be placed upright in a water container, and the lower part shall be immersed in water, placed in a cool and shady place, and shaded and transported in time for cutting. Cutting ears should avoid direct sunlight, should be carried out indoors, ear length 10 cm to 15 cm, cut smooth, prevent cracking skin, and remove the lower 2/3 leaves, according to 50 bundles put in a cool place to spray water Moisturizing.
The cuttings treated with rooting powder had fast rooting, good roots, and fast seedling growth. The specific usage is:
ABT rooting powder using the concentration of 100-200mg/L, soaked cuttings of the lower 3 cm, soaking time of 2 to 3 hours, indole butyric acid 50-100mg/L, time is 12 to 14 hours, naphthaleneacetic acid 5-15mg/L, The time is 2 to 3 hours and the rooting effect is very good.
The cutting bed should be flattened and smashed. The bed is sprayed with a 0.3% potassium permanganate solution 1 to 2 days before cutting. The liquid volume is 1 kg/m2. The cuttings shall be kept away from sunlight and exposed at a spacing of 2 cm and 7 cm, with a cutting depth of 2 cm to 2.5 cm. The branches shall be erected and filled with sand to compact the pores. To spray the water with a jug or spraying with a spray device every few minutes, keep the cuttings always moist and fresh.
Seedling management
After the twigs of seabuckthorn leave the mother's body, they consume more water due to respiration and transpiration, and need a lot of water to supplement. In particular, at the early stage of cutting, the air humidity of the cutting bed should be 80% to 90%. After the entire seedbed is cut, it is necessary to spray according to the technical requirements of the all-light spray cutting. In the initial stage of cutting, the spraying interval is usually 3 to 4 minutes, once every 30 seconds, and the interval time can be extended to 6 to 8 minutes after 7 days. 10 After the day, it is sprayed 10 to 15 minutes. It should be reminded that not as much water as possible is better. In order to maintain the temperature of the plugger bed in the range of 22°C to 28°C without affecting the water loss of cuttings, it should be sprayed as little as possible, which is conducive to rooting and less disease.
Twig cuttings are in high temperature season, and the humidity is high and susceptible to bacteria, affecting survival. On the day after the end of the cutting process, 0.125% to 0.2% of the drug carbendazim was sprayed and sterilized, and then the drug was applied 5 to 6 days later until all the seedlings had their roots. In order to meet the rooting requirement, 3 to 5 days after the cutting, the foliar dressing should be started. 0.3% urea and 0.2% potassium dihydrogen phosphate solution (the amount of liquid medicine per square meter of 0.25 kg) can be sprayed, and the nutrient solution is sprayed. The cuttings were sprayed for 30 minutes and then sprayed. The spray was sprayed every 4 to 5 days before rooting. Sprinkles were sprayed once a week after rooting. After the cuttings were all rooted, diammonium was added once the roots were nearly lignified.
Twig cuttings usually take about half a month to root, and root development is complete when one and a half months to two months. Generally, 5 cm and 10 cm apart from the plant are transplanted into the hardening plant. Remember not to root when transplanting, and timely irrigation to make soil and root system close. In order to prevent high temperature and moisture, the transplant bed should be covered with shading facilities and ventilation should be taken. After transplanting for half a month, the seedlings should be withdrawn after normal growth, and then the seedlings should be fertilized, watered, and weeded as usual.
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