Roses with red branches: the branches are reddish, and most of the flowers are clustered into multi-flowered umbels. Fruit subglobose, crimson.
Rosa glabra: It has slender procumbent branches, 7-9 leaflets, oval, smooth and hairless. Conical corymb with fragrant white flowers. Fruit ovoid, purplish red.
1. Growth habit
Roses are temperate and subtropical plants. Produced in North China, Central China, East China, South China and Southwest China. Strong sex, like light, cold tolerance, drought tolerance, waterlogging tolerance. Suitable for fertile, moist, slightly acidic and neutral loam with good drainage. Strong pruning resistance and pollution resistance.
2. Breeding method
Cutting propagation is the main method, and sowing, grafting or layering propagation can also be used. Cutting was carried out in late winter and early spring, with 1 year-old robust branches as cuttings, cut into 12~ 15 cm, and the insertion depth was 1/2, and the bed was loose sandy loam. After insertion, water should be sprayed frequently to keep the bed soil moist, which is convenient for rooting and survival. Sowing is used to cultivate rootstocks or hybrid varieties, so it is advisable to sow in spring as soon as possible. The layering is easy to take root and survive, suitable for rainy season. Buried branches and vines should be properly girdled.
3. Cultivation management
(1) potted plants
Prune properly when planting and put it in a cool shed, which can be carried out in spring and autumn. Potted soil should be fertile and loose, with good ventilation and water permeability. Generally, humus soil or mature pastoral soil should be mixed with appropriate amount of sand for cultivation. Usually keep the basin soil moist, but not too wet. Water more in summer and less in autumn. Soak soybean meal many times during the growth period, and dry cake crumbs can be applied as base fertilizer during the winter dormancy period. Pruning can be done before germination in early spring. If there are flower racks and lattice facilities, pruning, pruning and coring should be done properly before and after flowering, so as to improve ventilation and light transmission conditions and facilitate flowering and fruiting. If the buds are too dense, they should be properly thinned. Old piles of roses can be used to make bonsai.
(2) ground planting
Courtyards are often used as fences, fences, flower stands and green corridors for climbing and greening. It can be transplanted in spring and autumn, but not in high temperature and drought period. Bare roots or soil can survive. Water properly when the growing season is dry, and pay attention to drainage during the rainy season. The combination of fertilizer and water is suitable for mature cakes, and spraying potassium dihydrogen phosphate liquid fertilizer during the flowering and fruiting period is beneficial to improve the fruit setting rate. In winter, compost is applied as a base fertilizer slightly away from the roots. Pruning should be carried out in early spring, long branches should be shortened and dense branches should be sparse to avoid nutrient consumption and promote flowering and fruiting.
(3) Pest control
The main pests are aphids, moths, thorn moths, rose sawflies, red spiders and so on. Harm to leaves, leaf buds and flower buds. It can be sprayed with Derris liquid, trichlorfon 1200~ 1500 times liquid or Bordeaux liquid with 0.2 Baume degree. The main diseases are rose mold, black spot, powdery mildew, scorched leaf disease, canker disease, root nematode disease and so on. , spraying 1: 2: 200 bordeaux mixture can be controlled. Cut off diseased branches and burn them centrally.
observe
Rosa davurica is a kind of ornamental plant with gorgeous flowers, with sparse branches, lateral spreading, gorgeous colors, red seeds after flowering and red leaves in winter. In the Ming Dynasty, Gu Puyou said: "A hundred-foot-high rose branch fills the air into the bridal chamber; The dense leaves are green and heavy, and the flowers are red and brocade. "Poetry, praise the beauty of roses. Rose is a common vertical greening material in the courtyard. It can be planted as a flower stand, a green corridor and a garden gate. It can also be attached to walls and bamboo fences, with many branches hanging upside down, bright flowers and bright red fruits. Its potted bonsai can decorate balconies and halls.