Triploid gold willow cutting propagation
Triploid gold willow grows rapidly and does not flocculate in spring. The newly emerged shoots appear golden yellow, easy to reproduce and easy to survive. It is a suitable tree species for street trees. The cutting propagation techniques of Triploid Jinsiong will be introduced below.
Cutting selection and handling
The choice of cuttings and the choice of cuttings and cuttings are generally before the beginning of the tree germination every year in early March. If the premature selection is not conducive to the preservation in the cold winter season, the moisture and nutrients in the cuttings will be easily lost, and the cuttings will not be easy to survive; It is easy to take root and germinate in advance when it is stored. It is inconvenient for cutting and is not conducive to survival. It is usually intercepted from a mother of the same year old gold willow. You can choose to grow robust straight annual plants, cut off from the top 10 cm above the ground, or choose appropriate thickness of branches as a cutting from healthy plants. Cut off the branches, remove the excess side branches and the top part of the fine part can be cut off as a cutting. Each cutting is about 6-8cm in length. The upper end of the cutting is selected to be at the top of one lateral bud, and the lower cutting is at a 45-degree angle between the two lateral buds, which is beneficial to the absorption of water after cuttings to form dense layers and callus. It is conducive to rooting. Each cutting should retain at least 5 to 6 lateral buds. If the number of lateral buds is too low, it is not conducive to rooting after cutting.
The preservation of the cuttings should be graded after cutting. The cuttings of similar thickness are divided into one category, and each number is bundled neatly with a string after a certain number. Grading the cuttings is conducive to placing cuttings of similar quality on the same plot during cuttings, which facilitates the subsequent plant maintenance. Because the quality of the plants grown by different quality cuttings is not the same, the thick cuttings grow relatively quickly and the trunk is thicker; while the relatively weak cuttings are relatively thin, and require different methods of conservation in the later period of conservation.
Cuttings must be preserved in sand after baling. Sand traps can maintain the moisture in the cuttings to the maximum extent and delay the germination of the cuttings. In order to maintain the moisture in the cuttings, the tips of the cuttings can be waxed before sanding, and the tips of the cuttings can be lightly licked in the molten wax to make the top cross section evenly covered with a thin wax liquid. . Wax can not be too thick too much, otherwise it will affect the budding germination. In sand traps, the cuttings should be placed in a bunker, covered with clean sand, and watered at the same time.
Cutting
Site preparation for cutting propagation The selected plot should be flat and regular, with loose and fertile soil, good drainage for irrigation, good light, and the former plant is best not a plant of the family Salicaceae in order to prevent soil-borne diseases. The soil should be deep-turned before entering the winter of the previous year. Deeply turning the land is conducive to the ripening of the soil, killing the pathogenic bacteria and eggs hidden in the soil, and improving the physical and chemical properties of the soil. Ten days before the cutting, the deep-turned plots were sited. The site preparation can remove the remaining roots and weeds from the plot, and the ground can be leveled and rake. In the 3 to 4 days before the cutting, the cutting land is irrigated once. The appropriate cutting season is from the end of March to the beginning of April, and the cuttings should be selected. Sunny and windless weather. When the cuttings are removed from the sand pits, the cuttings should be examined to see if the cuttings have germinated. If the cuttings have begun to germinate, the callus and new roots are already present at the bottom, and it is best to use the method of first inserting the grooves and then inserting them. If not rooted, it can be cut directly. When cutting, it is best to draw a straight line on the ground or use a string to mark straight. The spacing of the cuttings was 15cm60cm, the cuttings were flat and upward, and they were inserted into the soil obliquely downwards. The top of the cuttings exposed the ground 1 ~ 2cm, leaving a pair of lateral buds as well. After the cuttings are inserted, apply the feet to the soil on both sides to make them firm and upright, and check whether there are any inserts inserted in the opposite direction. After the cutting is completed, the irrigation is performed again. After the irrigation, the cuttings that are washed down or fallen by the water will be straightened, and the soil will be backfilled in the place where the soil is sunk to ensure the normal growth of the cuttings.
Post-cutting maintenance
One week after cutting, no watering is required. Frequent watering easily leads to high soil moisture content, poor air permeability, and is not easy to take root. If it is too dry, it can be properly irrigated. Golden willow cuttings have a high survival rate. In the middle and late April, the top buds of the cuttings will germinate. If the apical buds germinate in large areas one after the other, it means that the cuttings have begun to grow into roots. After germination of the apical buds, only one or two lateral buds were initially retained, other sprouts were wiped out, and only one vigorously growing lateral branch remained as the main branch. After entering the month of June, the trimming of the branches should be carried out to remove the lateral branches of the plants from 1.0 to 1.5 m above the ground to ensure the growth of the main branches. After transplanting, it will be gradually transplanted within 2 to 3 years to ensure its growth space, and at the same time pay attention to the control of pests and diseases. In the early stage of survival, due to the fact that the planting is too dense, it is easy to cause diseases such as aphids and rot, and organic fertilizers may be added to increase the resistance of the plants and remove the plants with pests and diseases. The plants can be dried in combination with transplanting, and the height of drying is generally about 3.5m.
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