张家口坝缘山地樟子松适生立地初步研究

Suitable Site for Pinus sylvestris var. mongolica Litv.in the Southern Mountains of Bashang Plateau in Zhangjiakou

应用测树学对6种立地类型样方内的样本进行外业调查及统计分析,通过研究发现:不同立地类型下生长势也存在显著差异(0.05),在样方调查30株中阳坡厚层土生长良好株树比阴坡薄层土生长良好株树多了16株,所以得出最适宜樟子松生长的立地类型是阳坡厚层土,其次为阳坡中层土和阴坡厚层土,最差的是阴坡薄层土。樟子松在坝缘山地不同立地类型生长差异很大,地径生长和树高生长均达到极显著水平(0.05),地径生长和树高生长在不同立地类型中的阳坡厚层土和阴坡薄层土相差最大分别为4.4 cm、110.8cm;在不同海拔高度研究中,海拔高度在1 600 m的幼树生长情况(阳坡良好率80%,阴坡良好率66.7%)明显好于1 700 m幼树生长情况(阳坡良好率46.7%,阴坡良好率26.7%),所以可知研究区域内适宜樟子松生长的海拔高度应在1 600 m。最终得出张家口坝缘山地适生立地为海拔高度为1 600 m的阳坡厚层土,而且通过比较分析,得出影响樟子松人工幼林生长的主导因子为土层厚度、坡向及海拔高度。

In this paper, the samples in six site of measurement. The study shows that there is types have been made field investigation and statistic analysis by use signifi types, about 16 fine trees growed in thick layer soil in cant difference （0.05） on the growth vigor in different site sunny slope are more than the ones in thin layer soil in shade slope, so, the thick layer soil in sunny slope is the most suitable sity type for Pinus sylvestris var. mongolica L. to grow, and then is middle layer soil in suuny slope and thick layer soil in shade slope, with thin layer soil in shade slope be the worst. For Pinus sylvestris var. mongolica L. , the ground diameter and tree height show the significant difference （0.05）. The difference of ground diameter and tree height among different site types is 4.4 cm and 110.8 cm separately. In the research on different altitude, the growth of young trees at 1 600 m are obviously better than the ones at 1 700 m , so the suitable altitude for the growth of the research area. Finally, in the southern mountains of Bashang P sylvestris var. mongolica L. is thick layer soil in sunny slope at 1 factors for the growth of Pinus sylvestris var. mongolica L. are soil Pinus sylvestris vat. mongolica L. is 1 600 m in lateau in Zhangjiakou , the suitale site for Pinus 600 m . And through the analysis, the leading depth, aspect and altitude.