在陕南利用本土树种进行人工造林研究介绍

 在陕南秦岭山区的在摞荒地，用本土树种进行人工造林研究。在田间实验中，通过在2个地点（一个清除植被，一个没有清除植被）比较4个树种（中国杉、栓皮栎、山东槭树、中国榛树）的优劣程度，并在种植后一年，用树种存活量和高度来评价实验是否成功。结果显示，所有调查树种的成活率是令人满意的，然后高度不十分理想。由于中国杉种植在好的母质上，它的高度是非常合理的，然而栓皮栎和山东槭树很矮。另一方面，由于中国榛树嫩枝枯死，导致它的嫩枝数量呈减少趋势。竞争植被的砍伐对存活量和高度没有重要影响。长时期的调查将为用本土树种进行人工造林提供可靠的数据支持。

Introduction to a Study on Afforestation by Native Tree Species in the Southern Shaanxi Province

Afforestation of abandoned agricultural lands with native tree species was undertaken in the Qinling Mountain in the South of Shaanxi Province. In a field experiment, four tree species (Chinese Red pine, Chinese Cork oak, Shandong Maple and Chinese Pistache) were studied in combination with two site cultivated techniques (with and without clearance of the competing ground vegetation). Survival and height growth increment of cultivated trees were used in assessing the success of the first year after planting. The survival of all investigated species was satisfactory, while the total height development was not the same for all species. Red pine was the only species that exhibited reasonable height increment due to the good quality of its initial planting material. Negligible height increment could be recorded for Maple and Cork oak. On the other hand, the Pistacia seedlings showed a decrease due to the dieback of shoots. Clearance of the competing ground vegetation had no significant effect on the survival or height increment. Long term investigation will provide reliable information about the success/failure of the afforestation by native tree species.