徂徕山不同立地条件下油松、麻栎径向生长对气象因子的响应

Influence of climate factors on radial growth of Pinus tabulaeformis and Quercus acutissimain different site conditions on Culai mountains

面对气候变化,为了更加科学地进行森林经营抚育,提高生态林的功能效益,选取泰安徂徕山区不同海拔和坡向的油松、麻栎2个树种的样本,建立年表,分析各树种径向生长与气温、降水的响应情况。结果表明:麻栎、油松2个树种生长更易受降水的影响,两者与7月份、8月份的降水量呈正相关,2个树种对降水和气温因子响应程度为油松大于麻栎。在海拔600~800m范围内,油松对降水和气温的响应程度是阳坡大于阴坡,表明油松较宜生长于600~800m的阳坡,而麻栎对气温和降水2个因子的响应表现也是阳坡大于阴坡,600~800m范围阳坡较适宜麻栎的生长;在海拔400~600m范围,油松生长与降水、气温的相关性不显著;在海拔200~400m范围内,阴坡的油松生长主要受气温限制,阳坡的油松生长主要受降水影响。

In face of the climate change,in order to carry out the forest management tending more scientifically and improve the ecological benefits of the ecological forest,samples of the two species of Pinus tabulaeformis and Quercus acutissima at different altitudes and slope directions in Tai’an Culai Mountain were selected to establish the chronology and further,the response of each tree species’radial growth to temperature or precipitation was analyzed.The results showed that the growth of the two tree species was mainly affected by precipitation,and both of them were positively correlated with precipitation in July and August.Between the two tree species,the response degree to precipitation or temperature factors was:Pinus tabulaeformis>Quercus acutissima.In the range of 600~800 m altitude,the response degree of Pinus tabulaeformis to temperature or precipitation was sunny slope>shady slope,and Pinus tabulaeformis was more suitable for growth in sunny slope of 600~800 m.The response degree of Quercus acutissima to temperature and precipitation was positive:slope>shady slope;Quercus acutissima was more suitable for growth in sunny slope at the altitude of 600~800 m.In the lower level,the response of Pinus tabulaeformis to temperature and precipitation was not apparent at the altitude of 400~600 m.At the altitude of 200~400 m,the growth of Pinus tabulaeformis in shady slope was mainly affected by the temperature,while that in sunny slope was influenced mainly by precipitation.