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林业资源管理 ›› 2009, Vol. 0 ›› Issue (6): 96-101.

• 科学技术 • 上一篇    下一篇

毛白杨农田防护林带细根分布特征

宋子刚1, 周文权2, 王彦辉3*   

  1. 1.国家林业局调查规划设计院,北京 100714;
    2.中国机构国家认可委员会,北京 100013;
    3.中国林业科学研究院,北京 100091
  • 收稿日期:2009-11-16 修回日期:2009-11-24 出版日期:2009-12-28 发布日期:2020-12-18
  • 通讯作者: 王彦辉(1957-),男,河北安平人,研究员,主要研究方向为森林生态及水源涵养。
  • 作者简介:宋子刚(1957-),男,北京人,高工,主要从事森林生态及营造林工程规划设计工作。
  • 基金资助:
    科技部社会公益研究专项资助项目“林业生态工程的水资源调节影响监测研究”(2000-82)。

The Fine Root Distribution Characters of the Shelterbelt of Populus tomentosa

SONG Zigang1, ZHOU Wenquan2, WANG Yanhui3   

  1. 1. Academy of Forest Inventory & Planning,Beijng 100714,China;
    2. China National Accreditation Board for Certifiers,Beijing 100013,China;
    3. The Chinese Academy of Forestry,Beijing 100091,China
  • Received:2009-11-16 Revised:2009-11-24 Online:2009-12-28 Published:2020-12-18

摘要: 研究了无断根沟的17a生一路双行毛白杨农田防护林的细根特征。结果表明,在距林带5.0m范围和100cm深农田内的单位土体细根特征值为:根重92.20g/m3,根长641.01m/m3,根表面积1.058 8m2/m3,根体积103.7cm3/m3,根尖数301 481个/m3。农田内的各细根特征值都随距林带的距离的增加而降低,基本上随着土壤深度先增加后降低,较高值出现在距林带1.5m范围内的20~40cm或40~60cm土层,在1.5m到3.0m的区间迅速或明显降低,在3.0m或5.0m以外则缓慢降低并且细根特征的最大值上升到10~20cm土层。由此可见,根系胁地最强的范围应在距林带3m以内。

关键词: 农田防护林, 毛白杨, 细根, 生物量, 根系

Abstract: A study on fine root characters of a 17-year-old populus tomentosa Carr. Shelterbelt composed of one row in each roadside without root-trench was carried out. The averaged root characters per-unit soil volume for the farmland range of 5.0m from shelterbelt and the depth of 100cm are as follows: root weight is 92.20g/m3, root length 641.01m/m3, root surface area 1.0588m2/m3, root volume 103.7cm3/m3 and fine root tips 301481 tip/m3. The root characters in farmland decrease with the increase of the distance from the shelterbelt, firstly increase and then decrease with the soil depth. Higher values are mostly distributed in the 20-40cm or 40-60cm soil depth within the range of less than 1.5m from the shelterbelt. The root characters decrease rapidly or obviously in the range from 1.5m to 3.0m. In the farmland 3.0m or 5.0m away from the shelterbelt, the root characters decrease slowly with the distance from the shelterbelt, and the maximum values of root characters rise to the soil layer of 10-20cm. The most competitive zone for crops may be the range within 3m away from the shelterbelt.

Key words: shelterbelt, populus tomentosa Carr., fine root, biomass, root system

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