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    苘 hemp

    • Last Update: 2021-03-14
    • Source: Internet
    • Author: User
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    Malvaceae is aherb from the hemp family. Also known as green hemp. Ligament fiber crops. Origin is different. Most scholars believe that it is of Chinese origin and that it is native to India. More than 2000 years ago, the cultivation and utilization ofin ancient Chinese books. The world's main producing countries are China, the Soviet Union, Mongolia and so on. China has planted from the Yangtze River basin to Heilongjiang Province, with the world's largest production.fiber is called "Tianjin jute" in the international market.

    hemp stem upright, upper multi-branched, 1.5 to 4.5 meters high, 1 to 2.5 cm thick, green, purple or lilac. Haired, leaf-heart-shaped or round, hairy, with blunt jagged edges. The flowers are yellow.fruit grinding disc shape, black-brown when ripe. Seed kidney-shaped, black-grey. The Soviet unionhemp into large and small subseeds. China to seed size, leaf handle length, stem color as the standard subseeds, 7 types. Chromosome number 2□ 42.

    hemp is a short-temperature sun crop, and the seedling period is more cold-resistant. Generally in the spring, underground 5 cm soil temperature stable at more than 10 degrees C when seeding. The number of birth days is 70 to 120 days. The effect of increasing yield in the northern planting of the south is remarkable, but because its sensitivity to the reaction to lighting conditions is weaker than that of other hemp crops, it is easy to receive mature seeds from the northern planting. Planting should not be too dense, per acre to leave about 20,000 seedlings is appropriate. When the hemp plant appears half flower and half fruit, the stem from green to yellow green harvest is high yield, good quality. After harvesting, the whole plant is soaked, deglued and stripped and dried.yellow or silver white, shiny, salt-resistant, water-resistant, mainly used as raw materials for marine and cultured keel ropes. The woven sacks are used to build tunnels, culverts and flood prevention.

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