Identification of Cistanche and confusion
ã€Citrus Cistanche】: It is a flat cylindrical shape, slightly curved, 3 to 5 cm long, 2 to 8 cm in diameter, and brown or grayish brown on the surface. A dense, wattled array of fleshy scaly leaves, usually with a broken tip. Weight, hard, slightly flexible, not easily broken, cross-section brown, light brown spotted vascular bundles, arranged in wavy ring pattern. The gas tastes sweet and bears bitterness. [4]
ã€Plants and flowers of Cistanche deserticola】: It is irregularly shaped like a flat cylindrical shape, a flat spindle shape, a flat oval shape, or a flat round shape. It is 6 to 8 cm long and 4 to 6.5 cm in diameter. Its surface is red-brown, grayish brown or brown. Tan, more twisted. The fleshy scales, densely imbricate and imbricate, are densely scattered in the upper part and lower, and the apex of scales has been cut off. The width of the base is more than 1 cm. The entire scale is slightly elongated and about 1 cm high. Weight, quality, toughness, no toughness, hard to break, cross-section granular, mostly gray-brown, some outer hard black glial sample. Dark brown spotted vascular bundles are numerous, irregularly scattered, and some have small cracks. Gas slightly, sweet and bitter.
ã€Salmon raw Cistanche deserticola】: Cylindrical, ovate to oblong-lanceolate, 1–2.5 cm long and 4–8 cm wide. Spikes are cylindrical, sepals short, ovate-lanceolate. The skin is yellow-brown, with indeterminate stomata, hard and inflexible, and light brown vascular bundles on the cross section, arranged in a chrysanthemum pattern. Gas slightly, taste slightly salty bitter.
ã€Grass Cinnamon】: Single stem, straight, 15 to 35 cm long, 0.5 to 1 cm in diameter, dark brown or brown, with longitudinal gutters and white short-wool. Leaves alternate, scaly or lanceolate, slightly wrinkled, 0.8-1.5 cm long, yellow-brown. The upper part of the stalk is spiked, 5 to 10 cm long, having hairy, lower flowers evacuated, upper flower intensive, flowers shrinking, showing a lip after flattening, 1.5 to 1.8 cm long, yellowish brown or pale purple. Some spikes have pods in the lower part of the ear, oval, about 1 cm long, brown. Hard and brittle, easy to break, cross-section white, with an irregular brown ring in the middle. Odorless, tasteless.
[Xiamen Shadong Cistanche]: Flat conical or spindle-shaped, 30 cm long. It is 5-9 cm wide, with sparse scaly leaves on the lower part of the stem, dense upper part, and broad stem and broad stem. Weight, quality, hard to break, brown and black section, a bit like vascular bundles scattered, some hollow. Gas slightly, sweet and slightly bitter.
Venlo structure is a popular one at present. This architecture uses horizontal girder as main bearer, forming a stable structure with columns. There is consolidation between horizontal girder and column, and hinge is used to connect column and foundation.
In Venlo greenhouse, foundation is made of reinforced concrete and the side wall is made of brick or reinforced concrete plate. The steel frame always use hot dip galvanized light steel. Roof beam adopts horizontal girder structure and using herringbone connection. The horizontal girder bears 2 or more roofs, which is made of aluminum alloy. This material is used as roof structure material and also glass inlay material. Other beams using gutter style to minimize the section. Delighting material of the roof and side wall using the hollow double-layer or multilayer PC board.
PC board is mainly made of PC/PET/PMMA/PP materials, it need sun screen coating to resist ultraviolet resist and ageing, and it is also required to be anti condensation and antidrug.
As a kind of light material, use PC board can greatly reduce the weight of greenhouse structure, and corresponding reduced the size of the steel frame, which saving the cost of steel.
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