Effect of Slope Orientation on the Growth of 5 Broad-leaved Trees in Northern Shanxi Province
The effects of different slope orientations on afforestation survival rate,leaf area,plant height growth and ground diameter growth were studied with 5 broad-leaved trees in northern Shanxi as test materials.The results showed that the sur-vival rate of Prunus sibirica was less affected by slope orientation,while Betula platyphylla had higher survival rates on sha-ded slopes.Quercus liaotungensis and Elaeagnus angustifolia had higher survival rates on sunny slopes.The leaf area of Tilia mongolica during the leaf expansion stage showed that the semi-shaded slopes were significantly larger than the sunny slopes and shady slopes.The leaf area of Betula platyphylla and Prunus sibirica during the leaf expansion stage showed that the shady slopes were significantly larger than the semi-shaded slopes.The leaf area of Quercus liaotungensis during the leaf expansion stage showed that the sunny slopes were significantly larger than the shady slopes.The leaf area of Elaeagnus an-gustifolia during the leaf expansion stage showed no significant difference between the sunny slopes and the semi-shaded slopes.There was no significant difference in leaf area among the 5 broad-leaved trees during the leaf shedding period on different slope orientations.Through comprehensive comparison,Elaeagnus angustifolia was suitable for planting on sunny slopes or semi-shaded slopes.Betula platyphylla was suitable for planting on shady slopes.Prunus sibirica and Quercus li-aotungensis were suitable for planting on sunny slopes.Tilia mongolica had poor growth on all slope orientations.
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