Tree Roots Anchoring and Binding Soil Reducing Landslide Risk in Indonesian Agroforestry
Tree root systems stabilize hillslopes and riverbanks, reducing landslide risk, but related data for the humid tropics are scarce. We tested fractal allometry hypotheses on differences in the vertical and horizontal distribution of roots of trees commonly found in agroforestry systems and on shear s...
| Autores principales: | , , , |
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| Formato: | Journal Article |
| Lenguaje: | Inglés |
| Publicado: |
MDPI
2020
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| Materias: | |
| Acceso en línea: | https://hdl.handle.net/10568/113336 |
| _version_ | 1855514775250796544 |
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| author | Hairiah, K. Widianto, W. Suprayogo, D. Noordwijk, M. van |
| author_browse | Hairiah, K. Noordwijk, M. van Suprayogo, D. Widianto, W. |
| author_facet | Hairiah, K. Widianto, W. Suprayogo, D. Noordwijk, M. van |
| author_sort | Hairiah, K. |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | Tree root systems stabilize hillslopes and riverbanks, reducing landslide risk, but related data for the humid tropics are scarce. We tested fractal allometry hypotheses on differences in the vertical and horizontal distribution of roots of trees commonly found in agroforestry systems and on shear strength of soil in relation to root length density in the topsoil. Proximal roots of 685 trees (55 species; 4–20 cm stem diameter at breast height, dbh) were observed across six landscapes in Indonesia. The Index of Root Anchoring (IRA) and the Index of Root Binding (IRB) were calculated as ΣDv2/dbh2 and as ΣDh2/dbh2, respectively, where Dv and Dh are the diameters of vertical (angle > 45°) and horizontal (angle < 45°) proximal roots. High IRA values (>1.0) were observed in coffee and several common shade trees. Common fruit trees in coffee agroforestry had low medium values, indicating modest ‘soil anchoring’. Where root length density (Lrv) in the topsoil is less than 10 km m−3 shear strength largely depends on texture; for Lrv > 10 shear strength was >1.5 kg m−2 at the texture tested. In conclusion, a mix of tree species with deep roots and grasses with intense fine roots provides the highest hillslope and riverbank stability. |
| format | Journal Article |
| id | CGSpace113336 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 2020 |
| publishDateRange | 2020 |
| publishDateSort | 2020 |
| publisher | MDPI |
| publisherStr | MDPI |
| record_format | dspace |
| spelling | CGSpace1133362024-06-26T10:09:12Z Tree Roots Anchoring and Binding Soil Reducing Landslide Risk in Indonesian Agroforestry Hairiah, K. Widianto, W. Suprayogo, D. Noordwijk, M. van soil properties landslide agroforestry ecology Tree root systems stabilize hillslopes and riverbanks, reducing landslide risk, but related data for the humid tropics are scarce. We tested fractal allometry hypotheses on differences in the vertical and horizontal distribution of roots of trees commonly found in agroforestry systems and on shear strength of soil in relation to root length density in the topsoil. Proximal roots of 685 trees (55 species; 4–20 cm stem diameter at breast height, dbh) were observed across six landscapes in Indonesia. The Index of Root Anchoring (IRA) and the Index of Root Binding (IRB) were calculated as ΣDv2/dbh2 and as ΣDh2/dbh2, respectively, where Dv and Dh are the diameters of vertical (angle > 45°) and horizontal (angle < 45°) proximal roots. High IRA values (>1.0) were observed in coffee and several common shade trees. Common fruit trees in coffee agroforestry had low medium values, indicating modest ‘soil anchoring’. Where root length density (Lrv) in the topsoil is less than 10 km m−3 shear strength largely depends on texture; for Lrv > 10 shear strength was >1.5 kg m−2 at the texture tested. In conclusion, a mix of tree species with deep roots and grasses with intense fine roots provides the highest hillslope and riverbank stability. 2020-08-01 2021-04-14T03:59:43Z 2021-04-14T03:59:43Z Journal Article https://hdl.handle.net/10568/113336 en Open Access MDPI Hairiah, K., Widianto, W., Suprayogo, D. and Van Noordwijk, M., 2020. Tree roots anchoring and binding soil: Reducing landslide risk in Indonesian agroforestry. Land, 9(8), p.256. https://doi.org/10.3390/land9080256 |
| spellingShingle | soil properties landslide agroforestry ecology Hairiah, K. Widianto, W. Suprayogo, D. Noordwijk, M. van Tree Roots Anchoring and Binding Soil Reducing Landslide Risk in Indonesian Agroforestry |
| title | Tree Roots Anchoring and Binding Soil Reducing Landslide Risk in Indonesian Agroforestry |
| title_full | Tree Roots Anchoring and Binding Soil Reducing Landslide Risk in Indonesian Agroforestry |
| title_fullStr | Tree Roots Anchoring and Binding Soil Reducing Landslide Risk in Indonesian Agroforestry |
| title_full_unstemmed | Tree Roots Anchoring and Binding Soil Reducing Landslide Risk in Indonesian Agroforestry |
| title_short | Tree Roots Anchoring and Binding Soil Reducing Landslide Risk in Indonesian Agroforestry |
| title_sort | tree roots anchoring and binding soil reducing landslide risk in indonesian agroforestry |
| topic | soil properties landslide agroforestry ecology |
| url | https://hdl.handle.net/10568/113336 |
| work_keys_str_mv | AT hairiahk treerootsanchoringandbindingsoilreducinglandslideriskinindonesianagroforestry AT widiantow treerootsanchoringandbindingsoilreducinglandslideriskinindonesianagroforestry AT suprayogod treerootsanchoringandbindingsoilreducinglandslideriskinindonesianagroforestry AT noordwijkmvan treerootsanchoringandbindingsoilreducinglandslideriskinindonesianagroforestry |