水曲柳萌芽更新的研究

Sprouting regeneration of Fraxinus mandshurica.

为了研究水曲柳的萌芽更新特性 ,以便恢复和发展水曲柳资源 ,作者在长白山林区对水曲柳林进行了不同采伐季节、不同伐桩直径、不同伐桩高度、保留不同萌条数的试验 ,并调查了水曲柳自然定株的定株结果及定株时间 .结果表明 ,水曲柳萌生条只在采伐后的第一个生长季节内萌发 ,到第二个生长季节伐桩就失去了萌生能力 ;在非生长季节采伐而萌发的萌条其生长情况明显好于在生长季节内采伐而萌发的萌条 ;萌条数量随着伐桩直径的增大而增多 ,但萌条的平均高、茎生长量却不随伐桩直径的变化而变化 ;萌条数量与伐桩高度呈负相关关系 ;人工定株有利于水曲柳萌条的生长 ,以保留萌条 1～ 4株较好 ;水曲柳自然定株结果以 2～ 4株为主 .自然定株时间主要发生在萌条 3～

In order to study the sprouting regeneration traits of Fraxinus mandshurica and to resume and develop this precious species, experiments in different seasons, for different diameters, different heights of the stumps, and different sprout reserving numbers were conducted in the Changbai Forest Region, China, and the field planting results and time of \%Fraxinus mandshurica\% were investigated as well. The results show that Fraxinus mandshurica only sprouted in the first growing season after it was cut; when the second growing season came, it lost the sprouting capability. However, the growth of sprouts that were cut in the non growing season was better than those cut in the growing season; the number of the sprouts increased with the growth of the diameter, but the growth of the average height and the average diameter of the sprouts did not change with the changes of the stump diameter; the number of sprouts decreased with the increase of the heights of stump. Artificial field planting would benefit the growth of Fraxinus mandshurica, when 1 to 4 sprouts were reserved; 2 to 4 sprouts are the main results of its natural field planting. The time of natural field planting mainly happened within the period between its 3 years and 10 years age.