• <table id="uwus4"></table>
  • 電話
    您當前所在的位置:首頁 - 新聞資訊 > 熱點問題 >

    來源:http://www.newpaltzjournal.com 時間:2022-11-28

    China is rich in bamboo resources. Bamboo, known as the second forest resource, is an important substitute for wood. However, because bamboo contains more nutrients than ordinary wood, it is easy to decay, mildew and moth eaten under warm and humid conditions, which shortens the service life. The research on the decay characteristics and anti-corrosion technology of bamboo in Jinan is of great significance for the rational utilization of bamboo resources and the alleviation of the contradiction between supply and demand of wood.
    Bamboo resources
    全世界的竹類超過75屬1 250種,竹林面積約為2 200萬hm2。我國竹資源豐富,共有竹類39屬、500多種,主要分布在福建、江西、湖南、浙江、四川、河南、安徽、廣西、湖北、云南、江蘇12個省(區)的167個縣(市),我國的竹林面積約占全世界竹林面積的l/4,占全國森林面積的2.84%。因此,開發利用竹材資源,對緩解我國木材供需矛盾,進一步促進林業產業化的形成,都有現實和長遠的意義。
    There are more than 1250 species of bamboos belonging to 75 genera in the world, and the bamboo forest area is about 22 million hm2. China is rich in bamboo resources. There are 39 genera and more than 500 kinds of bamboos, which are mainly distributed in 167 counties (cities) in 12 provinces (districts) of Fujian, Jiangxi, Hunan, Zhejiang, Sichuan, Henan, Anhui, Guangxi, Hubei, Yunnan and Jiangsu. China's bamboo forest area accounts for about 1/4 of the world's bamboo forest area, accounting for 2.84% of the national forest area. Therefore, the development and utilization of bamboo resources is of practical and long-term significance to alleviate the contradiction between supply and demand of wood in China and further promote the formation of forestry industrialization.
    Anti corrosion of bamboo
    Bamboo grows fast, has a high yield, becomes a timber early, and has a wide range of uses. Compared with wood, bamboo has some differences in structure and properties, which are shown in its high strength, good toughness, and high hardness. Its main mechanical properties can be comparable to that of hard hardwood. As an engineering structural material, bamboo has broad development and application prospects. However, bamboo materials contain more nutrients, including protein content of 1.5% ~ 6.0%, soluble sugar of about 2%, starch of 2.02% ~ 5.18%, fat and wax of 2.18% ~ 3.55%. Bamboo materials and bamboo products are prone to decay, mildew and moth eaten when stored and used in warm and humid environment. Therefore, the preservative treatment of bamboo materials is more important.
    The antiseptic treatment of bamboo is mostly based on the antiseptic treatment of wood. However, due to the great difference in anatomical structure between bamboo and wood, the antiseptic treatment of wood cannot be mechanically applied.
  • <table id="uwus4"></table>
  • 超碰97免费人妻|yc2500 奇米黄色网站|caa618 青青热久免费精品视频|y2y389 日韩一区二区|yay794 菠萝蜜视频网站|3aa641 亚洲精品23p|cc1706 亚洲熟妇无码一区二区三区导航|cy1282 香港三级在线完整版观看|aaa67 青草视频在线观看|c1c736 538精品在线|yyc361 午夜成人影院|1ya39 台湾佬娱乐网|cy1526 最近2019中文字幕免费视频|yyc727 久久99热只有频精品|c2y793 99久久免费视频播放99|cac49 在线视频精品|y2y327 黄色电影网站|caa835 亚洲黄色视频|0cy141 国产精品第一页|cc0861 日本视频免费观看|aa0738 久久综合久久综合|aaa635 一本v亚洲v天堂一区二区|c0a137 久久精品国产在热亚洲|cca803 谁有黄色网址|1ac749 国产精品久久久久精品综合紧|cc174 老鸭窝在线视频|ccy388 亚洲中文字幕永久在线天堂|a1y937 国产在线视频|aaa856 亚洲精品无码|9ca34 色吊丝中文字幕|yc9981 日韩 国产中文字幕|cac763 久久99热只有频精品|c9c118