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Frontiers of Forestry in China

ISSN 1673-3517

ISSN 1673-3630(Online)

CN 11-5728/S

Front. For. China    2008, Vol. 3 Issue (2) : 158-164    https://doi.org/10.1007/s11461-008-0031-x
Biomass of fine roots and its relationship with water-stable aggregates in a composite ecosystem of triploid in the conversion of farmland to forest
FANG Chuan1, LI Xianwei1, ZHANG Jian1, FANG Bing2, DONG Huixia3
1.State Key Laboratory of Ecological Forestry, Sichuan Agricultural University; 2.State Key Laboratory of Ecological Forestry, Sichuan Agricultural University;Institute of Applied Ecology, Chinese Academy of Sciences; 3.State Key Laboratory of Ecological Forestry, Sichuan Agricultural University;College of Life Sciences, Henan Normal University
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Abstract A study on the biomass of fine roots and its relationship with water-stable aggregates (WSA) was conducted in two herbaceous models, triploid Populus tomentosa + Lolium multiflorum (TL) and triploid P. tomentosa + natural grass (TN). Both of the model triploid P. tomentosa stands were four years old converted from agriculture. Unconverted steep slope farmland was used as a control site. Results showed that the biomass of fine roots (≤1 mm) in different layers varied in the following descending order: upper layer, middle layer and lower layer, at approximate ratios of 50:30:20. The average annual biomass of fine roots in ryegrass was twice that of the mixed natural grass-forest land. The total amount of natural grass roots was 4.4 times that of the ryegrass model. Water-stable aggregates of the upper, middle and lower layers and the unconverted farmland did not show any significant differences, whereas the amounts of water-stable aggregates of big-particles in the upper and middle layers were much larger than those of unconverted lands. The amounts of water-stable aggregates of natural grass-forest lands (TN model) were higher than those of managed grass-forest lands (TL model). Two-way analysis of variance indicated that fine roots (≤1 mm) could significantly enhance water-stable aggregates and total water-stable aggregates. We conclude that the program of converting agricultural lands to forest-grass lands is an effective way in improving soil anti-erosion capability.
Issue Date: 05 June 2008
 Cite this article:   
LI Xianwei,FANG Chuan,ZHANG Jian, et al. Biomass of fine roots and its relationship with water-stable aggregates in a composite ecosystem of triploid in the conversion of farmland to forest[J]. Front. For. China, 2008, 3(2): 158-164.
 URL:  
https://academic.hep.com.cn/ffc/EN/10.1007/s11461-008-0031-x
https://academic.hep.com.cn/ffc/EN/Y2008/V3/I2/158
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