| Autor: |
Peng-fei, Liu, Jing, Liu, Hong-hui, Zhu, Xin, Zhang, Ge, Zhang, You-fang, Li, Yu, Su, Chen-jia, Wang |
| Rok vydání: |
2016 |
| Předmět: |
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| Zdroj: |
Ying yong sheng tai xue bao = The journal of applied ecology. 27(1) |
| ISSN: |
1001-9332 |
| Popis: |
Taking four plant species, Caragana korshinskii, Salix psammophila, Hippophae rhamnides and Artemisia sphaerocephala, which were 3-4 years old and in vigorous growth period, as test materials, the anti-fracture forces of lateral-root branches and adjacent upper straight roots were measured with the self-made fixture and the instrument of TY 8000. The lateral-root branches were vital and the diameters were 1-4 mm. The results showed that the anti-fracture force and anti-fracture strength of lateral-root branches were lesser than those of the adjacent upper straight roots even though the average diameter of lateral-root branches was greater. The ratios of anti-fracture strength of lateral-root branches to the adjacent upper straight roots were 71.5% for C. korshinskii, 62.9% for S. psammophila, 45.4% for H. rhamnides and 35.4% for A. sphaerocephala. For the four plants, the anti-fracture force positively correlated with the diameter in a power function, while the anti-fracture strength negatively correlated with diameter in a power function. The anti-fracture strengths of lateral-root branches and adjacent upper straight roots for the four species followed the sequence of C. korshinskii (33.66 and 47.06 MPa)S. psammophila (17.31 and 27.54 MPa)H. rhamnides (3.97 and 8.75 MPa)A. sphaerphala (2.18 and 6.15 MPa). |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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