Research on Root System of Caragana korshinskii at Different Site Conditions in the Hilly Regions of Loess Plateau

BI Jian-qi; DU Feng; LIANG Zong-suo; RAN Longgui

The root systems of 3 years Caragana korshinskii at different site conditions in the hilly regions of Loess Plateau were studied.The results showed that the lateral roots of Caragana korshinskii mainly grew in the depth of 0～20 cm underground,and under all site conditions there were no lateral roots below 50 cm depth except sunny slope and semi-sunny slope.The total amount of lateral roots sunny slope was the most,and that of shady slope was the least.The vertical distribution of root biomass of Caragana korshinskii under different site conditions showed a gradually decreasing from soil top-layer to deep-layer.The ratio of root biomass in 0～60 cm soil layer to the total was the biggest and beyond 80 percent.The individual root biomass in sunny habitat was 66.63 g and larger than that of others,the shady habitat was the lowest,only 6.69g.The aboveground of Caragana korshinskii under different site conditions had significant deference,the height and biomass of Caragana korshinskii in sunny and semi-sunny slope were higher than that on other site conditions.Caragana korshinskii in young-age period were suitable for growing on the sunny and semi-sunny slope on Loess Plateau.

1. College of Life Science of Northwest Sci-Tech University of Agriculture and Forestry, Yangling 712100, Shaanxi, China

2. Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Yangling 712100, Shaanxi, China

3. Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Yangling 712100, Shaanxi, China

4. Agriculture College of Northwest Sci-Tech University of Agriculture and Forestry, Yangling 712100, Shaanxi, China

Received Date: 2005-06-23

Abstract: The root systems of 3 years Caragana korshinskii at different site conditions in the hilly regions of Loess Plateau were studied.The results showed that the lateral roots of Caragana korshinskii mainly grew in the depth of 0～20 cm underground,and under all site conditions there were no lateral roots below 50 cm depth except sunny slope and semi-sunny slope.The total amount of lateral roots sunny slope was the most,and that of shady slope was the least.The vertical distribution of root biomass of Caragana korshinskii under different site conditions showed a gradually decreasing from soil top-layer to deep-layer.The ratio of root biomass in 0～60 cm soil layer to the total was the biggest and beyond 80 percent.The individual root biomass in sunny habitat was 66.63 g and larger than that of others,the shady habitat was the lowest,only 6.69g.The aboveground of Caragana korshinskii under different site conditions had significant deference,the height and biomass of Caragana korshinskii in sunny and semi-sunny slope were higher than that on other site conditions.Caragana korshinskii in young-age period were suitable for growing on the sunny and semi-sunny slope on Loess Plateau.

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Reference (13)

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Research on Root System of Caragana korshinskii at Different Site Conditions in the Hilly Regions of Loess Plateau

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