Firecrackers are Scrophulariaceae, Firecrackers is a perennial evergreen grassy plant, plant height of about 1 meter, slender stems are green, with longitudinal edges, with a majority of branches, branches in the rotation. Leaflets are opposite or whorled, and most of the leaves are reduced to small scales except for individual leaves that are oval. Conical cymules, calyx pale green, corolla long, red, apex obscurely two liplike, upper lip 2-lobed, lower lip 3-lobed, from May to August for full bloom. Firecrackers originating in Central America, like warm, moist and sunny environment, so as much as possible to accept the cultivation of sunlight in cultivation, that is, summer, and do not have to shading. Afraid of waterlogging, slightly drought-tolerant, watering to see dry see wet, neither long-term accumulation of water, nor too dry. When the air is dry, the plants can be sprayed with water to increase the air humidity. During the growing season, apply a thin diluted liquid fertilizer or compound fertilizer every 10 days or so. In winter, put it in indoor sunlight, control watering, stop fertilizing, and safely overwinter over 8°C. Change pots once a year in the spring, basin soil should be loose and fertile, and the sandy soil with good drainage and air permeability can be used after mixing 2 parts of rot leaf and 1 part of garden soil and sand, and incorporate a small amount of decomposed cake fertilizer as base fertilizer. . Firecracker flowers bloom on twigs and are resistant to pruning. Therefore, they are often trimmed during cultivation to promote multiple shoots. This can not only maintain the beauty of the plants, but also achieve the purpose of multiple flowering. The propagation of firecracker flowers can be carried out in the spring by dividing the mother plants from the flowerpots, dividing them into 2 to 3 clumps, truncating them appropriately, and then planting them separately. It is easy to survive. Cuttings can also be made from May to June. The cuttings can be used with mature stem segments from 3 to 5 knots, with the tips of the tips removed and the old branches that have been wooded below. Each segment is 7 cm to 10 cm in length, and the lateral branches are cut off. Insert 1/3 of the soil, put it in half shade, keep the soil moist and a certain amount of air humidity, take root from 20 days to 30 days, transplant and plant seedlings when 3 true leaves grow. The bright red flowers of the firecrackers bloom on the delicate branches, and they look like firecrackers that are ignited. They give people a warm feeling of celebration. Potted plants can be used to decorate balconies, patios, and interiors, as well as hanging pots for planting, hanging under porches, in front of windows, etc. In areas with warmer climates, it can also be planted on flower beds, beside rockery, near rocks, etc.
An amorphous carbon. Light, loose and very fine black powder with a very large specific surface area ranging from 10 to 3000m2/g is the product of incomplete combustion or thermal decomposition of organic matter (natural gas, heavy oil, fuel oil, etc.) in the absence of air. Specific gravity of 1.8-2.1 made from natural gas called "gas black", made from oil called "lamp black", made from acetylene called "acetylene black". In addition, there are "trough black" and "furnace black". Carbon Black is classified into "reinforcing carbon black", "conductive carbon black" and "abrasion resistant carbon black". It can be used as a black dyestuff for the manufacture of Chinese ink, ink, paint and so on. It is also used as reinforcing agent for rubber.
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