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Fine root distribution pattern of different aged Leucaena leucocephala trees in debris flow source area in Jiangjia Gully,China |
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| Authors: | Ling-hui Guo Dao-jie Wang Xiang-min Sun Dong Chen Xiao-yan Chen |
| Affiliation: | 1. Key Laboratory of Mountain Hazards and Earth Surface Processes, Chinese Academy of Sciences, Chengdu, 610041, China 2. Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing, 100101, China 3. University of Chinese Academy of Sciences, Beijing, 100049, China 4. Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu, 610041, China |
| Abstract: | Fine root is critical to restrain soil erosion and its distribution pattern is of great influence on the restraining effects. This study studied the fine root biomass (B r ) distribution of different aged Leucaena leucocephala (5, 10, 15 years) in debris flow source area in Jiangjia Gully by digging downward to the bottom at different distances to stem in three directions on slope. The results showed the B r increased dramatically by 143% from 5 years to 10 years and then rose slowly by 38% from 10 years to 15 years. The B r of 5 years was significantly asymmetric between uphill and alonghill directions, but there was little difference among directions for other ages, and a concentration trend appeared to exist in downhill and alonghill directions. Moreover, fine root (D≤1 mm) was significantly heavier than that of fine root (1mm |
| Keywords: | Leucaena leucocephala Jiangjia Gully Debris flow Root distribution |
| 本文献已被 CNKI 维普 SpringerLink 等数据库收录！ | |