Current growth differences of Norway spruce (Picea abies), Scots pine (Pinus sylvestris) and birch (Betula pendula and Betula pubescens) in different regions in Sweden
Current growth differences of Norway spruce (Picea abies), Scots pine (Pinus sylvestris) and birch (Betula pendula and Betula pubescens) in different regions in Sweden
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DOI：
10.1080/02827580802249126
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发表时间：
2008-01-01
影响因子：
1.8
通讯作者：
Frisk, Johan
中科院分区：
文献类型：
--
作者：
Eko, Per-Magnus;Johansson, Ulf;Frisk, Johan
林业中物种的选择很重要，也是一个真正的问题，因为瑞典南部大片被风破坏的林地需要再生。为了比较瑞典最常见树种之间的生长潜力，使用了由立地属性确定的立地指数值得出的立地质量之间的比率。利用回归函数从立地属性确定桦树立地指数，以补充已知的云杉和松树立地属性与立地指数之间的关系。在瑞典的大片地区，计算了场地质量等级的分布，以比较这三种物种的特点和需求。平均而言，在瑞典南部，松树与云杉的生长差异约为60%，在瑞典北部为95%。桦树和云杉的对应数字分别为40%和60%。在瑞典北部，桦树预计生产约60%的松树，在瑞典南部约占70%。然而，必须强调的是，比较是基于主要包括自然再生桦树的调查数据，而主要种植的是云杉和松树。
The choice of species in forestry is important, and a real issue as large areas of wind-damaged forest land in southern Sweden need to be regenerated. To compare the growth potential between the most common tree species in Sweden, ratios between site quality derived from site index values determined with site properties were used. A regression function to determine site index for birch from site properties was used to complement the known relationships between site properties and site index for spruce and pine. In large regions of Sweden the distribution of site quality classes was calculated to compare the special characteristics and demands of the three species. On average, the growth difference for pine compared to spruce was about 60% in southern Sweden and 95% in northern Sweden. Corresponding figures between birch and spruce were 40% and 60%. Birch was expected to produce around 60% of pine in northern Sweden and about 70% in southern Sweden. However, it must be stressed that the comparison is based on survey data encompassing mainly naturally regenerated birch, whereas spruce and pine are mainly planted.