When will pingyin rose blossom?

Pingyin rose is famous all over the world and enjoys a long-standing reputation. Among them, the top rose and the big corolla are the best. Let's talk about when pingyin rose blooms. Come and have a look!

When will pingyin rose blossom? It usually blooms from the end of April to the end of May. About a month, it is generally called "the first flower". The flower production in this period can account for 90% of the whole year, and the flowers are large and of good quality. Sporadic flowering began in late June and continued until the end of September. We usually call it mid-late flower, and the flower output at this time accounts for 10% of the whole year. And the flowers are small and nutritious, and it is very easy to attract insects in hot weather.

Cultivation management in pingyin rose.

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The whole plant or mother plant dividing method can be used before germination or after defoliation in spring and autumn, especially in autumn. That is to say, dig out the stems with vigorous growth and many tillers by roots, remove the attached soil and keep as many fibrous roots as possible. Depending on its growth, it is cut into several independent new plants, generally 2 ~ 3 per plant. 1 ~ 3-year-old plants are suitable for ramets. The rose seedlings cultivated by the method of dividing plants have good quality and high survival rate, and can bloom in large quantities in two or three years after planting.

Burying method is to use the aboveground stems of roses to artificially turn them into underground stems, sprout new roots and buds on their nodes, and make them into one or several new plants. The method of burying strips is generally carried out after defoliation, before hibernation and before soil freezing. 1960 In the early spring, the Rose Research Institute successfully tried to raise seedlings by burying strips, and 500 plants emerged that year.

Rooting method Rooting method is to use the characteristics that pingyin rose roots can grow new buds after being cut off, plant some horizontal roots near the plant cluster, or use the roots that have been cut off during fertilization and seedling raising. These cut underground tissues have strong germination ability, and good new plants can germinate as long as suitable soil moisture conditions are created.

Grafting method 1963 began to try grafting seedling method in March, and 1966 was successful. Grafting method can be carried out in spring, summer and autumn with cutting roses as rootstock. Grafting includes bud grafting, branch grafting, embryo grafting and stigma grafting. Bud grafting has the advantages of scion economy, easy healing, firm joint, high survival rate, simple operation, high work efficiency, long grafting period and easy to make up for non-survival. It is the most widely used breeding method in pingyin rose.

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As the saying goes, "plant trees for life, don't let the trees know." As long as the thin tube is intensively cultivated, it can be planted all year round. Autumn defoliation to spring germination is the suitable period, and the best period is defoliation to freezing. There are specific requirements for planting in different seasons.

Planting in spring is carried out in early spring after soil thawing and before rose germination. Late February to early March is the suitable time for planting in spring. At this time, the root system of the rose has begun to grow, and the branches above the ground have not germinated. After transplanting, the root system is damaged, the broken root heals quickly, new roots are easy to grow, and the survival rate of transplanting is high. Planting in spring ends before the roses germinate, otherwise the survival rate will be affected.

Summer planting summer planting is to transplant roses in the growing period of roses by using the characteristics of continuous rainy season, moist soil and high air humidity. At this time, it is in the hot season, roses are in the peak season, and the evaporation of branches and leaves is large. When planting in summer, we must seize the favorable opportunity of continuous rain in summer, otherwise the survival rate will be low. This method is only suitable for mountainous areas that are dry in winter and spring.

Autumn planting time is generally from mid-June 65438+1October to1early October165438+1October. At this stage, the rose leaves have begun to fall off, and a large amount of nutrients flow back to the root system, which increases the nutrition of the root system. However, due to the high ground temperature, the root system is still in the growth stage, and the root system is damaged after transplanting. The broken root can be completely healed before winter, and new roots can be issued. According to the field investigation, the damaged roots of Chinese rose plants transplanted in the middle and late June of 65438+February1October all healed, and a large number of new roots emerged. The survival rate in the second year is above 95%, followed by the later transplantation. Therefore, transplanting in autumn should be advanced appropriately, otherwise the root system will not recover well, the absorption capacity will be weakened, the upper and lower moisture will be unbalanced, and the rose branches will dry up easily in winter, causing some branches or the whole plant to dry up and die.

Planting density and deep intensive production are mainly close planting, with row spacing of 2m ~ 2.5m and plant spacing of 0.8m ~1.2m.. For wide planting, the row spacing can be selected according to the interplanting crops, with 3750 ~ 4950 plants per hectare. The plant spacing of rose beside the weir is 0.8 m ~ 1.2 m, and the row spacing of rose in bud stage should be relatively reduced. In the early stage of high planting density, the yield is fast and the income is early, and the dense planting garden should be sparse after five or six years. The depth of planting soil generally requires 25 cm ~ 30 cm. If it is too deep, it will not grow vigorously, so it is necessary to keep the depth of planting soil when transplanting seedlings. The grafted part of seedlings should be higher than the ground, and should be watered when planting. Those plants planted in late winter will produce large mounds in the rhizosphere. Next spring, scrape under the grafting site. After planting, it should be cut off from the ground (or grafting site) 15 cm ~ 20 cm. In this way, in the second year, it germinates quickly and has many branches. There are three roses in each hole, arranged in a triangle.

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Fertilizer and water management

In the germination stage, nitrogen fertilizer is mainly applied, combined with nitrogen and phosphorus, such as urea and diammonium phosphate, or biological bacterial fertilizer and organic compound fertilizer to promote the growth of young leaves. From budding to flowering, if fertilizer and water are insufficient, it will directly affect the yield and quality of flowers, make petals thinner, reduce oil content and cause a large number of buds to fall off. Experiments have proved that there is generally no shortage of fertilizer and water from germination to flowering in spring. If the soil is dry during this period, it should be watered once before the flower picking period to avoid affecting the flower picking. Shooting period of branches and leaves: In the middle and late June, summer roses begin to grow. At this time, appropriate nitrogen and phosphorus fertilizers should be applied in conjunction with intertillage to supplement the consumption of nutrients by flowering, which is beneficial to the growth of roots and new shoots. Nutrient storage period: from mid-August to mid-June of 10, branches and leaves gradually stop growing, and a large amount of nutrients return to the root system, and the root system is at the peak of growth. In this period, organic fertilizer and biological fertilizer should be mainly applied, with little or no available nitrogen fertilizer, and soil moisture should be properly controlled to prevent later growth. Dormancy period: Enter dormancy period after defoliation in autumn. During dormancy period, base fertilizer can be deeply applied for winter irrigation. In short, the management of fertilizer and water should at least ensure "three times the fertilizer and four times the water" every year.

Eliminate pests and diseases

The main diseases in pingyin rose are rust, branch blight and mosaic. Rust is a kind of disease with high incidence and great harm. Prevention and control methods:

(1) Strengthen fertilizer and water management, balance fertilization and timely irrigation to promote healthy growth of plants and improve disease resistance.

(2) Drug control. Spraying 3 ~ 5 degrees sulfur mixture or 400 times 75% chlorothalonil before germination in spring can control the occurrence of rust, kill some eggs and reduce pests. Before the onset of disease after flowering, Bordeaux mixture can be sprayed for 2 ~ 3 times to prevent it, and copper master, thiophanate-methyl, virus A and mancozeb can be used alternately. Spraying Bronze Master, 50% carbendazim, triamcinolone acetonide and thiophanate methyl in August and September has a good effect on discs with serious rust.

The main pests that harm pingyin rose are scarab, weevil and red spider. Scarabs and weevils (commonly known as cowboys) mainly harm flower buds, tender buds and tender seedlings, and in serious cases cause extinction. Red spider mainly harms young leaves and buds.

Control measures: In the first half of April, when scarabs and weevils were unearthed, poisonous baits mixed with phoxim or trichlorfon were released in the garden to trap and kill adults. From mid-June to late August, spraying 0.3 degree sulfur mixture or 3000 times acaricide to control red spider.

Pruning and updating

Pingyin rose has a strong germination ability, flourishing branches and leaves, criss-crossing, often overcast, covering the sky. If it is not pruned in time and the ventilation is opaque, the branches will be thin and green and easy to get rust. According to different planting methods, different tree ages, water and fertilizer conditions and growth conditions, scientific pruning methods should be formulated to ensure that the old branches of the tree are not old, the branches are not dense, and the trees are ventilated and transparent. Generally 1 ~ 3-year-old short branches are production branches, and their flowering ability will gradually weaken after 4 years. It is necessary to prune and promote new branches properly. Pruning time is divided into winter and spring pruning and post-flowering pruning. Pruning in winter and spring is carried out after the leaves of roses fall and before germination. To realize light pruning of flourishing plants, those with weak growth potential and long age should be pruned again. After flowering, pruning is mainly to sparse over-dense branches and cross dead branches, and light pruning should be carried out appropriately. Pruning methods are divided into sparse pruning and update pruning. Thinning and pruning are mainly carried out in each growth period of roses, and the best period is after defoliation. The grafted roses become thinner at the base, and the budding roses become thinner all over the ground or a few centimeters underground. Mainly cut off diseased branches, residual branches, dead branches, over-dense branches, cross branches and ground branches, and keep vigorous branches. It is better to arrange branches in plum blossom shape on the ground of a single plant, and it is best to have 5 branches. Regeneration pruning method, branch rotation method, plant rotation method and whole garden regeneration method. Regeneration and pruning can be carried out in winter and spring and after flowering, and the best period is after defoliation. After flowering, the growth of regenerated plants is weak, and the flowers will appear early in the next year, and the yield will not increase much. After defoliation in autumn, the plants will grow vigorously in the coming year, with basically no yield and high annual output in the next year.

Selection and storage

Pingyin rose is generally open in early May, with a flowering period of about 1 month. Rosebuds are best picked when they are in bud. Roses should be picked at the highest oil content, that is, they should be picked at dawn, finished before 8 o'clock, and transported to the processing place before 10. The ideal weather is temperature 15℃ ~ 23℃ and relative humidity 55% ~ 23.

After the roses are transported to the processing place, they should generally be processed immediately and stored for no more than 2 hours. For long-term storage, alcohol, salt, alum and sugar can be used for different purposes. Buds are dried or dried.