Chin J Plan Ecolo ›› 2006, Vol. 30 ›› Issue (5): 732-742.doi: 10.17521/cjpe.2006.0095

• Research Articles • Previous Articles     Next Articles

STUDY OF SOIL PREFERENTIAL FLOW IN THE DARK CONIFEROUS FOREST OF GONGGA MOUNTAIN, CHINA

NIU Jian_Zhi; YU Xin_Xiao; ZHAO Yu_Tao; ZHANG Dong_Sheng; CHEN Li_Hua; ZHANG Zhi_Qiang   

  1. Key Laboratory of Soil and Water Conservation & Desertification Combating of Ministry of Education, Beijing Forestry University, Beijing 100083, China
  • Online:2006-09-30 Published:2006-09-30

Abstract:

Background and Aims Preferential flow is the physical phenomenon of rapid transport of water and solutes in soil. It occurs in most soils and determines field_ scale transport of contaminants in soils, thereby contributing to groundwater pollution.
Methods Research on preferential flow involves studying the mechanism of soil water movement and can answer key questions that could not be explained by Darcy’s law and Convective_Diffusive Equation in early hydrological research. Experimental or technological analyses are difficult because this movement is not detected easily. Preferential flow increases the difficulty and complexity of there search due to non_equilibrium, regional characteristics and the involvement of many influencing factors. To date, the mechanism of the movement of preferential flow has not been properly defined. This study involved
detailed research on the influencing factors of preferential flow, using a soil column experiment in combination with dye_tracer analyzes in the root zone of the dark coniferous ecosystem in the upper drainage of the Yangtze River. Factors examined included rainfall processes, growth characteristics and water movement states of litter, moss, roots and soil. 
Key Results The soil of the research area is porous with large pores, and rainfall is low in amount and intensity and long_lasting. The soil also has thick litter and moss and is rich in roots. Therefore, the Gongga Mountain ecosystem may have preferential flow. Water transport has opened up preferential flow pathways along soil pores and root channels, forming a water channel in litter, moss and soil. 
Conclusions Soil will be transported continuously along these channels with longtime rainfall.

No related articles found!
Viewed
Full text


Abstract

Cited

  Shared   
  Discussed   
[1] Wang Ren-qing Zhang Zhi-guo Tang Li Shi Zhu Zhang Shu-ping. Recent Advances in Ecology and Environmental Botany[J]. Chin Bull Bot, 1995, 12(专辑2): 248 -252 .
[2] LIU Wei Hua ZHANG Gui You DAI Yao Ren. Detection and Quantification of Melatonin in Leaves,Flowers and Seeds of Baikal Skullcap (Scutellaria baicalensis) by HPLC[J]. Chin Bull Bot, 2003, 20(01): 75 -79 .
[3] WANG Man-Ling HU Zhong-Li ZHOU Ming-Quan SONG Yun-Chun. Advances in Research of Polyphenol Oxidase in Plants[J]. Chin Bull Bot, 2005, 22(02): 215 -222 .
[4] WU Xiang-Yu. Enjoy Teaching Which Benefits Teacher As Well As Students[J]. Chin Bull Bot, 2003, 20(04): 501 -504 .
[5] Chen Ping-liang and Jin Wei. Methods of Viability Assay and the Mechenism of Viability Decresse for the Pollen Grains from Woody Species[J]. Chin Bull Bot, 1990, 7(01): 64 -66 .
[6] Pan Qing-kun. The Effect of Crossing on Transfer of Nuclear Materials in Pollen Mother Cells of Rice[J]. Chin Bull Bot, 1984, 2(05): 41 -43 .
[7] . [J]. Chin Bull Bot, 1998, 15(专辑): 45 -46 .
[8] Gan Fan-yuan Xu Chen Zheng Guang-zhi. The Physiological Effects of Oligosaccharins on Culture Cells of Carthamus and Panax Notoginseng[J]. Chin Bull Bot, 1995, 12(03): 36 -40 .
[9] Wang Yi-zhang;Xu De-qi and Tao You-rong. Effect of Potassium 2,3-epoxypropionate on photosynthesis and Grain Yield in Wheat[J]. Chin Bull Bot, 1990, 7(01): 27 -30 .
[10] Chen De-fu;Cheng Bing-song;Wang Chun-xiang;Meng Xin-rong and Li Xiu-qing. Studies on the Yield and Quality of Celeriac Somatic Embryos[J]. Chin Bull Bot, 1991, 8(04): 26 -31 .