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| Branch quantity characteristic of six kinds of soil and water conservation plants |
| (1.College of Ecology and Environmental Science，Inner Mongolia Agricultural University，010019，Hohhot；2.Southwest Forestry College, Environmental Science and Engineering，650224，Kunming；3.School of Soil and Water Conservation, Beijing Forestry University，100083，Beijing：China) |
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Abstract The biomechanical properties of branches is the basis for the study on effect of aerial part of plants on the windbreak and soil erosion reduction. In this paper the branches of six kinds of soil and water conservation plants (Caragana microphylic, Hippophae rhamnoides, Medicago sativa, Astragalus adsurgens, Hedysarum fruticosum, and Melilotus officinalis) in Waste Dump of Strip Mine in Heidaigou were taken as research object. Through studying the the characteristic of branch quantity, representative branches of plants were determined, thus the bais data and relevant parameter were supplied to the study of biomechanical properties of branches. The process of selecting representative branches is that: firstly, the diameters of branches were divided into several classes with distance of 0.5 millimeter. Then,the percentage of cumulative amount, cumulative length, surface area and dry weight of branches of each diameter class was calculated respectively, and diameter classes with high percentage of these values were selected as representative diameter classes. The results showed representative diameter classes of several plants, respectively, i.e. Caragana microphylia 0.5-1mm, 1-1.5mm, Hippophae rhamnoides 1-1.5mm, 1.5-2mm, Hedysarum fruticosum 0-0.5mm, 0.5-1mm, Medicago sativa 0.5-1mm Astragalus adsurgens 0.5-1mm, 1-1.5mm, Melilotus officinalis 1-1.5mm. In the study of the biomechanical properties of branches, it is recommended that in Inner Mongolia Zhungeer coal mining area and similar areas, representative diameter classes of the six kinds of soil and water conservation plant is the main study focus.
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Received: 04 March 2012
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