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Journal of Mountain Science

, Volume 5, Issue 3, pp 241–248 | Cite as

Effects of terracing and agroforestry on soil and water loss in hilly areas of the Sichuan Basin, China

  • J. H. ZhangEmail author
  • Z. A. Su
  • G. C. Liu
Article

Abstract

Soil erosion in hilly areas of the Sichuan Basin is a serious concern over sustainable crop production and sound ecosystem. A 3-year experiment was conducted using the method of runoff plots to examine the effects of terracing and agroforestry in farmland systems on soil and water conservation of slope fields in the hilly areas in Jianyang County, Sichuan Province, Southwestern China. A power function (Y = aX b) can statistically describe the relationship between water runoff (Y) and rainfall (X). The regression equation for the treatment of sloping terraces with crops (Plot 2) is remarkably different from that for the treatment of sloping terraces with grasses and trees (Plot 1) and the conventional up-and down-slope crop system (Plot 3) regarding equation coefficients, while regression equations are similar between Plot 1 and Plot 3. Water runoff amount and runoff coefficient of slope fields increased by 21.5∼41.0 % and 27.5 ∼ 69.7 % respectively, compared to those of sloping terraces, suggesting that terracing notably reduced the water runoff in the field. In the case of sloping terraces, lower amount of water runoff was observed on sloping terraces with crops than on sloping terraces with grasses and trees. Sediment yields on the slope fields in the normal year of rainfall distribution were notably higher (34.41 ∼ 331.67 % and 37.06 ∼ 403.44 % for Plot 1 and Plot 2, respectively) than those on sloping terraces, implying that terracing also plays a significant role in the reduction in soil erosion. It is suggested that terracing with crops is significantly effective for soil and water conservation in cultivated farmland, while the conventional practice of up-and down-slope cultivation creates high rates of water runoff and soil sediment transport. Terracing with grasses and fruit trees shows a less reduction in water runoff than terracing with crops, which was observed in the 3-year experiments.

Keywords

Agroforestry sediment transport runoff sloping terrace soil and water conservation 

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References

  1. Cassel, D. K. 1985. Spatial and Temporal Variability of Soil Physical Properties Following Tillage of Norfolk Loamy Sand. Soil Science Society of America Journal 47: 196–201.Google Scholar
  2. FAO, 1988. Soil Map of the World, Revised Legend. World Soil Resources Report 60, FAO, RomeGoogle Scholar
  3. Hammad, A.H.A., Børresen, T. and Haugen, L.E. 2006. Effects of Rain Characteristics and Terracing on Runoff and Erosion under the Mediterranean. Soil & Tillage Research 87: 39–47.CrossRefGoogle Scholar
  4. JIANG, D., WU, P. and WANG, Y. 1989. The Strategic Position of Slope Field Transformation to Terrace in Dryland Farming of the Loess Plateau in China. Chinese Journal of Soil and Water Conservation 3: 49–57. (In Chinese)Google Scholar
  5. Langbein, L.B. and Schumm, S.A. 1958. Yield of Sediment in Relation to Mean Annual Precipitation. Transactions-American Geophysical Union 39: 1076–1084.Google Scholar
  6. LIU, B.Y., XIE, Y. and ZHANG, K.L. 2001. Soil Erosion Prediction Models, Chinese Press of Science and Technology, Beijing. (In Chinese)Google Scholar
  7. LIU, G.C., LI, L., ZHOU, Z.H. and ZHANG, J.H. 2005. Influence and its Benefits Evaluation of Removal Lands from Cultivation to Afforestation and Grassland in Slope Farmland on Soil Erosion in Hilly Region of Purple Soil. Science of Soil and Water Conservation 3: 32–36. (In Chinese)Google Scholar
  8. LIU, G.S. 1996. Soil Physical and Chemical Analysis & Description of Soil Profiles. Chinese Standard Press, Beijing. (In Chinese)Google Scholar
  9. Nanjing Institute of Soil Science of the Chinese Academy of Sciences, 1978. Analysis of Soil Physics and Chemistry. Shanghai Press of Science and Technology, Shanghai. 132–517. (In Chinese)Google Scholar
  10. SHI, D.M. LU, X.P. and LIU, L.Z. 2005. Study on Functions of Soil and Water Conservation by Mulberry Hedgerow Intercropping of Purple Soil Slopping Farmland and in Three Gorges Reservoir region. Journal of Soil and Water Conservation 3: 75–79. (In Chinese)Google Scholar
  11. Wilson, L. 1973. Variations in Mean Annual Sediment Yield as a Function of Mean Annual Precipitation. American Journal of Science 273: 335–349.Google Scholar
  12. XU, J.X. 2005. Precipitation-vegetation Coupling and its Influence on Erosion on the Loess Plateau, China. Catena 64: 103–116.CrossRefGoogle Scholar
  13. ZHANG, J.H., LIU, G.C., Ni, S.J., ZHU, B. and GE, F.L. 2003. Anti-scouribility of Purple Soil on Hillslopes with Different Land Uses. Sciences in China Ser. E. 46(Supp.): 133–141.Google Scholar
  14. ZHANG, X.B. and FU, S.X. 1999. The Way out for Steep Land in Focal Areas with Severe Soil and Water Loss in the Upper Yangtze River Basin. Soil and Water Conservation in China 9: 938–939. (In Chinese)Google Scholar
  15. ZHU, W. 1988. Experimentation on Conservation Farming of Cropland on Slopes of Purple Soils in China. Soil and Water Conservation in China 6: 43–46. (In Chinese)Google Scholar

Copyright information

© Science Press, Institute of Mountain Hazards and Environment, CAS and Springer-Verlag GmbH 2008

Authors and Affiliations

  1. 1.Key Laboratory of Mountain Hazards and Earth Surface ProcessesChinese Academy of SciencesChengduChina
  2. 2.Institute of Mountain Hazards and EnvironmentChinese Academy of Sciences & Ministry of Water ConservancyChengduChina
  3. 3.The Graduate School of the Chinese Academy of SciencesBeijingChina

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