陕北南部侧柏生长与生态因子的关系
THE RELATION AMONG ECOLOGICAL FACTORS AND DIAMETER GROWTH OF PLATYCLADUS ORIENTALIS IN THE SOUTH OF NORTHERN SHAANXI PROVINCE
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摘要: 分别用灰色关联分析、数量化方法Ⅰ及多元逐步筛选回归方法分析了陕北南部气候、地形及土壤肥力与侧柏生长的关系,并对不同林分中侧柏的生长做了讨论。结果表明,气候因子中的降水量,地形因子中的坡位对侧柏径生长的影响很大,而坡度的影响主要表现在对侧柏高度生长的影响上。土壤含水量和有机质含量在侧柏林、松柏混交林阶段与侧柏径生长呈显著正相关,株类树对侧柏生长有显著抑制作用,而松类树对其无明显影响。Abstract: Using grey association analysis and quantificatlon method I,the relation among 7 clamatic factors, 3 topographic factors and diameter growth of Platycladus orientalis in 3 areas in the south of northern Shaanxi Province were analysed. The effects ofeach clamatic factor in these 3 areas are different,but annual rainfall and humidity arethe most important factors. The effect of position on slope is the prime important in topographic factors. Further analysis revealed that the aforementioned results are consistent. In addition,the growth of Platycladus orientalis in different communities and different soil conditions were discussed. The result Indicated that Quercus liaotungensis has detrimental effect on growth of Platycladus orientalis,while Pinus tabulaeformis and P.bungeana have not. It also revealed that soil moisture and soil organic matter are significant positive correlation with growth of Platycladus orientalis.
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期刊类型引用(2)
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