| 薄 涛,张凤宇.塞罕坝机械林场不同初植密度落叶松人工林天然更新研究[J].林业调查规划,2025,50(5):23-28,50 |
| 塞罕坝机械林场不同初植密度落叶松人工林天然更新研究 |
| Natural Regeneration of Larch Plantations with Different Initial Planting Densities in Saihanba Mechanical Forest Farm |
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| DOI： |
| 中文关键词: 初植密度 落叶松人工林 天然更新 塞罕坝机械林场 |
| 英文关键词: initial planting density larch plantation natural regeneration Saihanba Mechanical Forest
Farm |
| 基金项目: |
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| 中文摘要: |
| 为掌握塞罕坝机械林场不同初植密度落叶松人工林天然更新状况,于塞罕坝机械林场10年
生落叶松人工林设置低初植密度(2 450 株/hm2、2 880 株/hm2)、中初植密度(3 340 株/hm2、3 850
株/hm2)和高初植密度(4 270 株/hm2、4 750 株/hm2)6 个处理进行试验分析。结果表明,中初植密
度组的土壤肥力充足,可满足天然林更新的需求,其林下灌木层和草本层的新增物种数以及新增株数较少,落叶松人工林更新特征更为明显,幼苗、幼树地径和幼苗、幼树树高长势良好。落叶松人工林天然更新动态调查结果表明,中初植密度组的天然更新动态较好,低初植密度组其次,高初植密度组效果较差。不同初植密度直接影响落叶松人工林天然更新状况,以初植密度为
3 340 株/hm2和3 850 株/hm2的落叶松人工林天然更新效果较为明显,该初植密度可确保光照充
足,优化土壤养分和水分分配,调整物种间竞争关系,是相对适合塞罕坝机械林场落叶松人工林天
然更新的初植密度。 |
| 英文摘要: |
| To understand the natural regeneration status of larch plantations with different initial planting
densities in Saihanba Mechanical Forest Farm, an experiment was conducted in 10-year-old larch plantations
with six treatments: low initial planting density (2 450 plants/hm2 and 2 880 plants/hm2), medium
initial planting density (3 340 plants/hm2 and 3 850 plants/hm2), and high initial planting density
(4 270 plants/hm2 and 4 750 plants/hm2). The results showed that the medium initial planting density
group had sufficient soil fertility to meet the demands of natural forest regeneration, and the number of
new species and new plants in the understory shrub layer and herbacea layer were less. The regeneration characteristics of larch plantation were more obvious, and the ground diameter and height of seedlings and
saplings exhibited robust growth. The results of natural regeneration dynamics of larch plantation showed
that the natural regeneration dynamics of medium initial planting density was better, followed by low initial
planting density group and poor effect of high initial plant density group. Different initial planting
densities directly influenced the natural regeneration of larch plantations. The initial planting densities of
3 340 plants/hm2 and 3 850 plants/hm2 resulted in more significant natural regeneration effects. These
densities ensured adequate light, optimized the distribution of soil nutrients and moisture, and adjusted
interspecific competition, making them relatively suitable for the natural regeneration of larch plantations
in Saihanba Mechanical Forest Farm. |
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