凹叶厚朴材药两用林定向培育的立地选择

凹叶厚朴人工林在不同立地条件下的栽培试验结果表明:厚朴为喜温暖、湿润和肥沃树种,对土壤条件的要求比较高,坡位、坡向对厚朴生长的影响均较大,在山坡下部、阳坡生长较好;海拔高度对厚朴生长的影响效应小于坡位、坡向、坡度,且立地因子与厚朴生长之间具有密切的线性关系.结合不同厚朴试验林的土壤调查数据,建立了福建闽中山地厚朴人工林立地类型表,并认为Ⅲ类立地不适宜培育厚朴材药两用林,厚朴材药两用林培育应选择Ⅱ类以上的立地.

The Research of Site Selection of Difinite Direction Cultivation of Timber and Medical Use Magnolia officinalis var. biloba Rehd. et Wils. Plantation

The results of cultivation experiment on Magnolia officinalis var. biloba Rehd. et Wils. plantation cultivated under the different type site show that:M. officinalis var. biloba is to pleased warm, wetness and fertility, it also have a high request of soil regime. Both aspects of slope and slope orientation influence the growth of M. officinalis var. biloba tremendously, the results suggest that better growth appears in the positive slope and the lower part of hillslope, the influence of altitude above sea - level is lower than that of slope position and slope orientation. It also shows that slope steepness and factors of site have closely linear relationship with the growth of M. officinalis var. biloba. Based on the investigated data of soil from different M. officinalis var. biloba experimental plantations, the table of site type for mountainous land in middle Fujian was established, which show that site type of III is not suitable for cultivation of M. officinalis var. biloba and site type of cultivation of timber and medical use M. officinalis var. biloba plantation should be above II.