ã€Morphological characteristics and varieties】 Black-leaved Magnolia Bud is a perennial herb. It is a hybrid of A. sanderiana and A. lowii. Short stems, often 6 to 4 leaves. The arrow-shaped shield is 30 to 40 centimeters long and 10 to 20 centimeters wide. The tip is sharp and sometimes caudal. The petiole is long, light green, and there are 5-7 large dentate nicks on the leaf margin, trifurcation of the main vein, and lateral veins leading to nicks. The leaves are thick green, veins are silvery white, and there is a very narrow silver-white ring around the leaf margins. It is very eye-catching and the back of the leaves is purple-brown. Common species belonging to the same genus are A. sanderiana, also known as Avalon. The leaves are long and arrow-shaped. The silver-green leaves are shiny, with grayish veins, and the main lateral veins are prominent. A. Iowii, a large leaf-shaped, broad-hearted, pale brown-green leaf with gray-green veins. A. longiloba leaves (A.longiloba), leaf-shaped, leaf length 30 to 50 cm, petiole slender erect, dark green leaves, veins silver gray green. Mortefontanensis (A. mortefontanensis), leaf length 50 cm, long arrow-shaped, pale blue-green, with silver, green veins. Watson (A.watsoniana), leaf-shaped, wrinkled, leathery, blue-green leaves, with silver, white veins, purple back. A. korthalsii, leaf blade shaped, pale green, with silver veins. A.macrorrhiza, large and thin leaves, shield-shaped, petiole long, dark green. A. macrorrhiza var. variegata, with dense green leaves, milky white and light green patches. Tortoiseshell (C. cuprea), also known as the big flower leafhopper, has a heart-shaped leaf, the middle ribs and pinnate veins are dark green, obviously concave, and the back of the leaves are purple. In addition, there are A. cucullata, A. jodora, and A. plumbbe. ã€Biological characteristics】 Black leaf Aegicenia quintana is native to tropical Asia. Hi warm, moist and semi-negative environment. The optimum temperature for growth is 25-30°C, and the temperature in winter is not lower than 15°C. From March to September, it is 22 to 27°C, and from September to March, it is 16 to 22°C. Temperature below 15 °C, stagnant growth was dormant. Among them, A. lenticularis has a strong cold tolerance, and it can tolerate low temperatures below 10°C, but cannot be lower than 7°C. Black leaf Aegicenia kansui is resistant to water and moisture. In the growing season, the pot soil should be kept moist. The air humidity is 70% to 80%, which is beneficial to the growth and development of leaves. The leaves of K. dybowskii were soft and drooping when the basin soil was dry, but they quickly returned to their original state after watering, and they were also resistant to drought. The black leafy lotus buds are half-shade, avoiding strong light exposure. In the semi-negative environment, the leaves are fresh and shiny, with clear veins and dark green leaves. For example, under strong light, rough foliage, gray leaves, blurred veins, and sometimes burn spots on the leaves. The soil is well-drained, fertile, loose leafy or peat soil suitable. [propagation method] commonly used ramets and tissue culture. Breeding: From April to May, the mother plants are lifted from the pots, and the small tubers next to the mother plants are planted separately. If there is a wound when the tuber is peeled off, it can be smeared with grass ash or sterilized with sulfur powder to prevent it from being rotted when wetted. Tissue culture propagation: The leaves, stems and tubers are used as explants. If using a blade, under sterile conditions, disinfected with 75% alcohol for 15 seconds, then surface-sterilized with 0.1% Hg solution for 8 to 10 minutes, rinsed with sterile water 4 to 5 times. The leaves were cut into 0.5 cm square pieces and inoculated. The callus induction medium was supplemented with MS plus 6-benzylaminoadenine 1 mg/l and 2,4-D 1 mg/l. After 30 days, clustered shoots were differentiated. After another 25 days, the clustered shoots grew into small seedlings, cut into 1/2MS plus naphthaleneacetic acid 0.5 mg/L rooting medium, and became intact after 20 days. [Cultivation and Management] potted black leaf Guanyin lotus commonly used 15 to 20 cm pots. Because the roots of Aegicenia vibratum are developed, the substrate is a mixture of culture soil, peat soil and coarse sand. Pelvic floor tiles and broken bricks. During the period from May to September, when it grows vigorously, fertilizing once every half a month, it can also be used as a “family friend†20-20-20 general fertilizer, but the nitrogen fertilizer can not be excessive, otherwise the petiole will elongate, the leaves will become thin, and it is easy to fall down. After the winter leaves withered, the tubers were dormant and the pot soils were kept dry and stored in warm places. If the humidity is high and the temperature is low during tuber storage, the tubers are perishable. Black-leaved Buddleja Yam because of its large and thin leaves and few leaves, is not easy to damage. Therefore, the growth position of each leaf in the potted plants needs to be reasonable, and the requirements for high quality potted plants should be met. During the cultivation process, pay attention to the orientation and retention of the leaves, and make appropriate adjustments. [Pest and pest control] Common gray mold disease damage, the initial disease, with 59% thiophanate WP 1000 times spray. Under conditions of high temperature and high humidity, stalk rot is easy to occur and can be sprayed with 1000-fold solution of 70% thiophanate-methyl wettable powder. Insect pests were contacted with aphids to spread mosaic disease, and sprayed with 40% omethoate EC 1000 times. In addition, Spodoptera litura and cabbage caterpillars were harmed, and they were sprayed with 10% of insecticide-emulsion oil 3000 times. ã€Post-harvest treatment】 The black-leaf Guanyin lotus leaf is beautiful in shape, and the leaf color is dark green and very attractive. The potted plants embellish the living room, the study room and the window sill, which are more elegant and luxurious. Such as in the hotel, commercial teahouse and display windows, lifelike, even more interesting.