Alfalfa growth and development requires acidic soil. Because the soil in the north is mostly alkaline, the potting soil should be mixed with humus soil such as decomposed pine needle soil. The root system of Rhododendron is a fine root of whisker, which has strict requirements on fertilizer concentration and water quality. When fertilizing, it should follow the principle of appropriate amount of time and thin fertilizer. In order to promote the growth of branches and buds before flowering in spring, phosphate fertilizer can be applied once a month.
Apply 1-2 times of nitrogen and phosphorus mixed fertilizer after flowering. Apply 1-2 times of phosphate fertilizer during the gestation period from September to October. In the growing season, flowering period, more fertilizer and water requirements, winter dormancy, slow growth in summer, to control the fertilizer to prevent rotten roots. Rhododendrons prefer a humid and cool environment. The northern climate is dry and should be watered and sprayed in time to maintain high air humidity. Watering the flowers with water and rain is better. If you use common water, you need to add a small amount of ferrous sulfate and vinegar. Watermelon or tomato can also be cut into small pieces for good effect on improving soil quality and flower quality.
Plastic trim
In order to speed up the plant's full bloom, Du Fu often promotes new branches by picking the heart. For flowers and affecting flower shape, it can be budded early, which not only makes the flowers bloom in the same year, but also helps the plants to grow and bloom in the coming year. Du Fu's germination is strong, and the branches seriously affect the growth and development of the plants, reducing their ornamental and commercial properties, so they need to be adjusted by pruning. Pruning is generally carried out in the spring after flowering and autumn, cutting off dead branches, oblique branches, long branches and some cross branches to avoid nutrient consumption, so that the whole plant is full of flowers.
Flowering control
Rhododendron carries out flower bud differentiation in autumn, and can control the flowering period artificially by refrigerating and warming. To make the rhododendron flower in advance, it can be moved to the greenhouse for cultivation, the temperature is controlled at 20-25 ° C, and water is often sprayed on the branches and leaves, maintaining a relative humidity of 80% or more, so that it can bloom after one and a half months. To delay the flowering of azaleas, the rhododendrons that form the flower buds can be kept at a low temperature, kept at a temperature of 2-4 ° C, watered when the basin is dry, and moved out of the summer and autumn, and can bloom after 2 weeks.
The breeding method of alpaca can be propagated by sowing, cutting, grafting and layering.
Sowing and breeding
Rhododendrons are high in string, high in seed, high in germination rate, and can be used to obtain a large number of offspring, and the plasticity and viability of seedlings are important, which is an important means of introduction and breeding.
Seed germination technique
The hazelnut and net seeds stored at room temperature or low temperature (4 ° C) for more than 3 months were incubated with the culture dish and the flowerpot seedling method. The results showed that the seed was germinated by cryopreservation and seed germination. The rate is as high as 96%. The germinated seeds are transplanted into flower pots and covered with about 1 cm thick humus soil. The seedlings grow strong and tidy, and the survival rate is high. From March to March of the next year, the seedlings of the alpaca were placed in a greenhouse at 20-25 °C, and placed outdoors from April to September. The growth rate of the seedlings increased, and it was able to grow normally without falling leaves in winter.
Seed collection: When the autumn fruit is greenish brown or yellowish brown, it can be harvested, placed indoors to dry, until it cracks, shake the seeds, and store in a dry place indoors. Sowing in the second spring.
Seeding method
Use shallow basins, wooden boxes or in the ground bed, and lay out the well-drained coarse-grained soil. The surface layer is 2 cm with orchid mud or humus soil (all need to be disinfected). After the seeds are removed, a thin layer of fine soil is applied. Or add 0.5-1 cm shredded water moss on the orchid mud, the seeds are directly broadcast into the moss, without covering. Then the water is moistened with water, covered with a film or glass plate, placed in the shade.
Management method
Before the emergence of the seedlings, keep the soil moist. Generally, at 15-20 ° C, about 20 days of emergence, the germination rate is 75-85%. The cover can then be removed, paying attention to ventilation and increasing seedling resistance. Spray dry with a sprinkler when drying, do not wash down the seedlings.
Cutting propagation
Cutting propagation is the most widely used method. The advantages are simple operation, high survival rate, fast growth and stable traits.
Cutting
Take the twigs that have just been lubricated in the same year, with the armpits, flatten the hairs, cut off the lower leaves, and leave the top 4-5 leaves. If the branches are too long, the tops can be cut off. If you can't carry it with you, you can wrap the base with a damp cloth or moss, put it in a plastic film, put it in the shade, and store it for a few days.
time
Jiangnan is cutting before the mildew rain season, and the survival rate is the highest. Xiqiao is from late May to early June, and the donkey is from early to mid June. Dongpu and Xiayu are from mid-June to late June. At this time, the cuttings are tender and tender, the weather is warm and humid, and the survival rate is over 90%.
method
A small amount of potted tubing is available, and a large number of available beds are inserted. The medium can be used with orchid mud, Huangshan soil, river sand or hard rock, perlite, etc. It requires less germs, no weeds, and no fertilizer. Insert l/3 to l/2 of the cuttings, spray them with a fine pot and place them under the shade. The bottom of the basin needs to be raised by one brick; the bed is 20 cm deep, and the bottom of the bed is filled with a 7-8 cm thick drainage layer to facilitate drainage.
management
Within a month after insertion, the focus is on shading and watering, so that the cuttings are always fresh. Avoid heavy rain when it rains, and pay attention to drainage in the rainy days. Spray l/1000 tobuzin to prevent black spot disease. In the hot season, increase the ground and leaf surface water spray, pay attention to ventilation and cooling. About 1 month; after the long roots, the top of the shoot, if the formation of flower buds, should be removed. After 9 months, the shade will be reduced, and the seedlings will be gradually strengthened. In October, thin fertilizer can be applied. You can go to the basin in the next ten days. If an electronic leaf automatic spray device is installed on the cot, the medium is made of vermiculite or perlite, and no shading is required. Under full sunlight, rooting takes place in more than 20 days, and the survival rate is over 95%. It can be transplanted in 2 months.
Seedling technique
The deciduous rhododendron grows faster. When it grows 2-3 true leaves, it can be transplanted for the first time. The plant spacing is 2-3 cm. After the autumn, it grows to 2-3 cm high, and it is again transplanted into a 3-inch small pot, and three plants are in a pot. In the second year, depending on the growth, the seeds will be subdivided. Generally, flowers can be seen in 3-4 years. Evergreen rhododendron is transplanted for the first time after autumn and transplanted again in the next autumn. In the seedling stage, it is necessary to avoid glare, heavy rain, strong wind, the soil should not be too wet, and the watering is still sprayed.
Table Legs,Folding Table Leg,Aluminum Table Legs,Adjustable Height Table Legs
Wenzhou Zhaoxia Hardware Co.,Ltd , https://www.zhaoxiahardware.com