mans

Awn is a perennial reed herbal . stem 1 to 2 m tall, glabrous or sparsely pilose below inflorescence. sheath Glabrous, longer than internode; ligule Membranous, 1 to 3 mm long, apex and posterior mask cilia; The leaves are linear, 20~50 cm long, 6~10 wide millimeter Sparsely pubescent and powdery below, margin rough. ^[1]

panicle Upright, 15 to 40 cm long, Principal axis Glabrous, extending below middle inflorescence, pilose between nodes and axils of branches; The branches are coarser, erect, no longer branched or basal branches with a second branch, 10 to 30 cm long; The small branches are triangular, the edges are slightly rough, the short stalk is 2 mm long, the long stalk is 4~6 mm long; spikelet Lanceolate, 4.5 to 5 mm long, yellow glossy, basal disc with white or yellowish filamentous hairs longer than spikelet; First glumes with 3~4 veins, upper side veins rough, apical acuminate, back without hair; Second glume often 1-veined, crassy, upper intercreased margin ciliated; first palea Oblong, membranous, ca. 4 mm long, margin ciliated; Second lemma significantly shorter than first lemma, apex 2-lobed, splinter Interawn with 1 awning, 9-10 mm long, brown, geniculate, slightly twisted awning column, about 2 mm long, second lemma about 1/2 the length of its lemma; stamen Three, anther Palma 2~2~2.5 mm long, brown, first pistil And mature; Column head Pinnate, about 2 mm long, purplish-brown, protruding from the middle of the spikelets on either side. caryopsis Oblong, dark purple. Fruit period 7~12 months. ^{[1] [8]}

The awn grows under the sparse forest of the ridge, in the thickets, in the mountains, hills and barren slopes below the altitude of 1800 meters, and often forms the dominant community. ^{[1] [10 ]}

awn North Korea , Japan And China. Distributed in China Jiangsu (Province) , Zhejiang (Province) , Jiangxi (Province) , Hunan (Province) , Fujian (Province) , Taiwan , Kwangtung , Hainan (Province) , Guangxi , Sichuan , Guizhou (Province) , Yunnan (Province) And other provinces. ^[4]

Awn should be propagated by stem cuttings or branch plants. ^[3]

The cuttings were taken from July to August. Temperature when cutting 20~35℃; Water the substrate adequately when it is first irrigated, and then maintain the relative water content of the substrate at about 80%. The equal volume mixture of turf and loam is put into (8~15) cm × (8~15) cm through 20 mesh sieve Feeding bowl Medium. Select robust stems with full bud points and cut small segments with a growth degree of 3 to 5 cm, each segment with 1 bud point. Insert the stem vertically into the substrate, with the bud point about 1 cm below the surface of the substrate. One section of culm was cut from each pot. ^[3]

The dividing time is from April to October. The temperature was 20~35℃ when the plant was divided. Water the substrate fully during the first irrigation, and then keep the relative water content of the substrate about 80%. The mixture of grass charcoal and loam was filled with (8~15) cm × (8~15) cm nutrients through a 20-mesh sieve, and the healthy plants were selected as the mother plants, the stalks were cut off, and the stubble height was 10~15 cm. Dig the mother plant with soil and divide it into several subplants. Keep more than 3 in each branch tiller . Plant the separate plants into suitable nutrient POTS. One branch was planted in each pot. ^[3]

Select a place with a soil thickness greater than 30 cm, remove weeds, gravel, and rake clods. The planting time is from May to September. Select the container seedlings with good growth, well-developed roots, and have formed good root mass, plant height 10~20 cm, more than 5 visible leaves, more than 5 tillers, no damage to the nutrient pot, no diseases and pests. The depth and width of the planting hole are 15~20 cm. The spacing of the rows is 60~80 cm, depending on the soil fertility conditions. Each planting hole 1 plant container seedlings, covered with soil about 10 cm, moderate suppression, full watering. ^[3]

Irrigation: Timely irrigation once after planting, depending on soil moisture and climate conditions timely irrigation. ^[3]

Weed Control: After planting close Before, timely remove weeds. ^[3]

Trim: When used as an ornamental plant, it is advisable to cut off the yellow stems and leaves on the ground before returning to green. ^[3]

Harvest: When used as an ecological restoration plant or energy plant, it can be harvested once a year, from November of the current year to March of the next year. ^[3]

The straw fiber of awn is widely used as raw material for papermaking. It can also be cultivated as an ornamental plant. In Europe Ireland Many countries, such as a large area of planting awn, the use of its fast growth rate and short cycle of its characteristics for power generation, awn per hectare of dry matter production can reach 30 to 60 tons, 1 ton of miscanthus power generation equivalent to 3 barrels of crude oil. ^[1-2]

The high light cooperation of awn and its large plant leaf area make it easy to grow C4 pathway Fixed the carbon dioxide content of the atmosphere and ameliorated the problem of global warming. During the growth process, aeng can show tolerance to heavy metals in the soil. When nutrients are transported through the roots, water absorbed from the soil and a certain proportion of heavy metals content are transported to the stems and leaves, diluting the concentration of heavy metals in the soil and improving the soil quality. Awn has strong drought resistance, salt and alkali resistance characteristics. Awn is a pathway that has C4 photosynthesis, and most normal plants are C3 pathway Compared with awn, the photosynthesis of awn failed to fully absorb and utilize water. However, the stems and leaves of awn dried up in autumn, and only the roots were retained to absorb nutrients to prevent the evaporation of water, so that the stems and leaves could grow again. ^[2]