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| Relationship between plant system root and soil anti-scourability in the Shangshe catchment,Dabie mountains of Anhui Province |
| Zhuang Jiayao1,Zhang Jinchi1,Lin Jie1,Luo Hongyan1,Su Jishen1,Fu Jun2 |
| 1.College of Forest Resources and Environment,Nanjing Forestry University,210037,Nanjing;2.Anhui Forestry Department,230001,Hefei: China |
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Abstract The distribution of root biomass was studied in different layers(0-10 cm,10-20 cm,20-30 cm,30-40 cm) of soil depth with the plot method in different types of plant in the Shangshe catchments in the Dabie Mountains of Anhui province.Samples of root system were taken to the lab to measure their quantity and length.In each plot,soil anti-scourability in corresponding soil layer was measured with a C.C.Suoboliev anti-scourability instrument.The results showed that: 1) the root system was mainly distributed in 0-40 cm layer of soil,and the root quantity was the biggest in surface layer of soil.The fine root less than 1 mm in diameter was absolutely predominant in root length.2) In the same section,the values of anti-scourability index of surface layer were larger than those of other layers in different types of plant.The tree root system,especially the fine root less than 1 mm in diameter had powerful function on soil loss control.The correlated coefficients between the length,quantity,density of fine root and anti-scourability index were 0.817 3,0.715 9 and 0.643 4 respectively.The length of fine root was a key factor to soil anti-scourability index.Anti-scourability index was closely correlated with noncapillary of each different type of soil,indicating that forest had a soil-stability function because their root system improved soil physical properties and finally created a bio-soil system with anti-scourability.
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Received: 07 July 2007
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