Valentine's Day roses are mainly red, symbolizing passionate love and passion. Besides, there are white, yellow, orange and pink roses. But do you know that there is a mysterious black rose in the rose family, which is very popular among young people in recent years because of its unique personality. At first glance, it's unremarkable, but after careful taste, I find her mysterious and beautiful. At present, there are two kinds of black roses on the market, one is called "black magic". The other is called "Black Beauty", with a slightly smaller pattern, but more exquisite and unique, with a thick black and red color and a velvet luster of black gold.
In fact, black flowers in nature are very rare, especially real black flowers do not exist. The main reason is that black flowers can absorb all the light waves in the sun, and the temperature rises rapidly in the sun, so the tissue of flowers is easily damaged. So we often see red, yellow, orange, white and other colors of flowers. This is because these flowers can reflect red, orange and yellow light waves with more heat in the sun to avoid burning delicate flowers. It is a kind of self-protection function of plants, but black flowers do not have this ability, so they are gradually eliminated in the long-term evolution process. So the black flowers we see are actually dark red or purple flowers close to black, that is, "red is black, purple is black" in daily life, so are black peonies, black tulip and black chrysanthemums, and so are black roses.
Grape black rose
Original name: Black Rose
Variety Source: Black Rose is a table grape variety bred in California in 1950s, and its parents are (Damace Rose× Seedless Purple) and Rifelli. It is cultivated all over China.
Botanical characteristics: green shoots, no fluff. Young leaves are thin, lavender and shiny, with sparse fluff on the upper surface and no fluff on the lower surface. Mature leaves are large, nearly round, of medium thickness, dark green, 5-lobed, shallow-lobed, wavy, with smooth surface, sparse white hairs on the back, large jagged edge and slightly dull. The petiole depression is oval. Petiole purplish red, shorter than midvein, short internode. Amphoteric flowers.
Fruit characteristics: the spike is large, with an average spike weight of 700g, conical, small shoulders and compact and beautiful spike shape. The fruit is large, with an average grain weight of 8.0g, rectangular, deep purple, thick and tough skin, thick fruit powder, thick and crisp pulp, soluble solid content of 17.0% and acid content of about 0.6%. The fruit is rich in flavor, sweet and sour, and slightly irregular in color.
Growth and fruiting habits: the tree is robust, vigorous, resistant to stress, and not strict with soil, water and fertilizer. Average per branch 1.37 ear. The ear is planted in the 4th ~ 6th node, and the yield is high, but the fruit is easy to get sunburned, and it is easy to crack due to uneven moisture before ripening. In Huailai area of Hebei Province, it germinates in late April, blooms in early June, fruits are colored in early August and ripens in late September. It takes more than 160 days from germination to maturity, and it belongs to late-maturing variety.
Key points of cultivation: black rose has large ears and grains, which is easy to cultivate according to local conditions. Suitable for cultivation in arid and semi-arid areas of northwest and north China, suitable for scaffolding or T-shaped hedge shaping and mixed pruning of medium and short branches. This variety is prone to sunburn and fruit cracking before maturity, so attention must be paid to it in production, and technical measures to prevent sunburn and fruit cracking should be taken in time to avoid losses to production.