Pingyin rose is famous at home and abroad for its bright colors, large flowers, thick petals and rich fragrance. There are more than 50 varieties of roses in Pingyin, among which 3 varieties are mainly used in field production, namely Pingyin double-petal red rose, rich-flowered rose and purple-branched rose. Purple branch rose is a new variety cultivated by pingyin rose Institute. It belongs to the four seasons rose, with large petals, double petals and purplish red flowers. The diameter of the flower is .. l 1 cm, and the weight of a single flower is .. 3.5g It blooms from the end of the month to1October. Strong firmness and no rust. In those days, the branches were few or spineless, and turned purple after falling leaves. In May alone, the yield of flowers per mu can reach 500 Jin, which is an ornamental variety. Four seasons rose is a kind of tufted shrub, which belongs to Rosa of Rosaceae. In the natural environment, purple-branch roses bloom in Shandong at the end of April and the beginning of frost every year. In summer, the temperature is high, and the number of flowers decreases obviously in July and August, the most in May, followed by June and September. Four-season roses are resistant to pruning and easy to blossom, and almost all the branches that germinated in that year have blossomed. Four-season rose likes light, has strong adaptability, fast growth, many tillers, resistance to pests and diseases, cold tolerance, drought tolerance and barren tolerance, and grows normally in slightly acidic and slightly alkaline soil.
Four-season roses have developed roots. Because of its wide adaptability to climate and region, the four-season rose is suitable for planting and popularization in the vast areas of north and south China. Roses are also planted in Gansu, Xinjiang, Beijing, Zhejiang, Inner Mongolia, Sichuan, Shanxi and other places. Most of the rose varieties in these places come from Pingyin. 1, planting time
Roses can be planted all year round. In spring, it is carried out after the soil is thawed and before the tillering buds of purple-branch roses. After sprouting, cut up the branches of the seedlings and transplant them with clods. Choose rainy weather in summer, remove leaves and cut short branches. Nutrition pot seedlings can be selected locally. The best planting time in autumn is .. 65438+ mid-October to ..165438+1late October. ..
2. Soil conditions
Rose of Four Seasons is barren-tolerant and adaptable, and can grow normally in slightly acidic to slightly alkaline soil. The suitable soil is calcareous soil, and the soil ... P H value is ... 6.08.5.
3. Planting density
The planting density of four-season roses depends on the fertility of the soil. If the soil fertility is ashamed, the planting density that reaches a higher output value in a short time will be higher, and the planting density that does not reach it will be lower. Usually, the plant spacing is .. 1.5m-2m, or it can be 1.2m ~ 1.5m, but this density makes it difficult for later management.
4. Planting method
Pay-off at fixed points according to planting requirements, arrange shapes and dig holes. The cave is about 40 cm long, wide and deep, and the topsoil and subsoil are placed separately. Backfill the topsoil first, and then put the subsoil. Soil can also be disinfected with potassium permanganate and applied with organic fertilizer. The planting depth of purple rose is deeper than that of seedlings. Fill the remaining soil into the hole, then gently lift the seedling to the height of emergence, so that the root system of the seedling is stretched, then water it once, and water it again the next day according to the situation, and enter normal management after the seedling survives and is stable; Before freezing, the soil can be cultivated to prevent freezing injury. 1, fertilizer and water management
Although the four-season roses are drought-tolerant and not barren, they must meet certain fertilizer and water conditions in order to maintain a high output value.
According to the growth characteristics of roses in four seasons, apply fertilizer at least three times a year. The first germination accelerating fertilizer and the second fertilization after flowering can be combined with ammonium dihydrogen phosphate, and the dosage is .. 50 grams per square meter each time, and applied at different points. The third time is to apply base fertilizer in autumn, after defoliation and before freezing. This time, organic fertilizer was applied and the ditch was opened.
2, intertillage weeding.
According to the soil moisture, hoe the ground, raise the ground temperature, keep the moisture, and weed in time.
3, plastic trimming and updating
The most suitable pruning time is from defoliation to germination, and the dead branches, weak branches, insect branches, over-dense branches and old branches over three years are pruned. Retract perennial branches that are too high and too long. After flowering, pruning is mainly based on ventilation and light transmission, mainly thinning out over-dense branches and dead branches.
4, pests and diseases and their prevention and control
Disease and its prevention and control
The diseases of roses in four seasons mainly include powdery mildew and black spot.
Powdery mildew: Powdery mildew mainly harms the new shoots and young leaves of purple-branch roses. May 5- 10/0 was more severe. Poor ventilation and light transmission, continuous rainfall and excessive humidity will make roses seriously ill.
Preventive measures: improve ventilation and light transmission conditions through shaping and pruning to prevent roses from growing white; Spray carbendazim, bacitracin, etc. In the growth period, the proportion of liquid medicine is generally 5 00-.600 times according to the requirements of drug instructions. Black spot disease: Black spot disease mainly harms the leaves of purple branch roses, and when it is serious, the leaves of roses fall off. From July to September, the disease is serious, with low terrain, poor drainage and poor ventilation and light transmission, which is beneficial to the disease. High temperature and rainy weather are the main conditions for the epidemic of diseases.
Prevention and control measures: ① Pay attention to the sanitation of green space and remove garbage in time. (2) Reasonable close planting, improving ventilation and light transmission conditions through shaping and pruning. ③ spraying. 5 0% bacitracin or. 5 0% carbendazim. 00-600 times from early May to mid-June. 65438+ 10 month.
Pests and their control
The pests that harm roses in four seasons mainly include scarabs, longicorn beetles and red spiders.
Black velvet gill scarab: it mainly harms the new shoots, tender leaves, buds and flowers of purple branch roses.
Prevention and control measures: ① Trapping and killing with purple light; ② Spraying beta-cypermethrin. 2,000 times solution or. Effect of 4 0% omethoate 800 times solution on rose bush.
Yellow-banded blue-sky cattle: the stems and roots of purple-branched roses are damaged by larvae, and the stems and roots of the damaged plants die after being hollow.
Prevention and control measures: ① Manually remove insects and plants and burn them; ② Spray .. 4 0% omethoate .. 8 00 times solution or beta-cypermethrin .. 2 000 times solution as control. ..