坡向对山西北部5种阔叶树生长情况的影响

Effect of Slope Orientation on the Growth of 5 Broad-leaved Trees in Northern Shanxi Province

笔者以山西北部5种阔叶树为试材,研究了不同坡向对其造林成活率、叶面积、株高生长量、地径生长量的影响。结果表明,山杏成活率受坡向影响较小,白桦在阴坡成活率较高,辽东栎和沙枣在阳坡成活率较高。蒙椴展叶期叶面积表现为半阴半阳坡显著大于阳坡和阴坡,白桦和山杏展叶期叶面积表现为阴坡显著大于半阴半阳坡,辽东栎展叶期叶面积表现为阳坡显著大于阴坡,沙枣展叶期叶面积表现为阳坡和半阴半阳坡无显著差异。5种阔叶树在不同坡向的落叶期叶面积均无显著差异。综合比较可知,沙枣适合在阳坡或半阴半阳坡种植,白桦适合在阴坡种植,山杏、辽东栎适合在阳坡种植,蒙椴在各坡向的生长情况均较差。

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 survival rate of Prunus sibirica was less affected by slope orientation,while Betula platyphylla had higher survival rates on shaded 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 angustifolia 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 liaotungensis were suitable for planting on sunny slopes.Tilia mongolica had poor growth on all slope orientations.