| 李金龙.塞罕坝机械林场不同林龄落叶松人工林凋落物
养分释放特征分析[J].林业调查规划,2025,50(4):127-134 |
| 塞罕坝机械林场不同林龄落叶松人工林凋落物
养分释放特征分析 |
| Nutrient Release Characteristics of Litter in Larch Plantations withDifferent Stand Ages in Saihanba Mechanical Forest Farm |
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| DOI： |
| 中文关键词: 塞罕坝机械林场 林龄 落叶松人工林 凋落物分解 养分释放 |
| 英文关键词: Saihanba Mechanical Forest Farm stand age larch plantation litter decomposition nutrient
release |
| 基金项目: |
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| 中文摘要: |
| 为分析不同林龄落叶松人工林凋落物养分释放特征,以塞罕坝机械林场4种林龄(15 a、24 a、
35 a、44 a)落叶松人工林为研究对象,采用凋落物网袋法进行分解试验,分析不同分解阶段不同林
龄落叶松人工林凋落物养分释放特征。结果表明,林龄44 a落叶松人工林凋落物总质量损失率最
高,其次为林龄35 a、24 a、15 a;林龄44 a落叶松人工林半衰期和周转期最短;林龄15 a落叶松人工
林凋落物氮、钾、碳质量分数最高,随着林龄增长,其质量分数逐渐降低;不同林龄组间凋落物氮、
磷、钾、碳元素的释放率存在显著差异,随着林龄增长,其释放率逐渐提高;林龄44 a、35 a落叶松人
工林对比其他林龄,其凋落物养分积累得更多,营养元素较易释放,分解速率更快。以期揭示不同
林龄落叶松凋落物分解和养分释放规律。 |
| 英文摘要: |
| To analyze the nutrient release characteristics of litter in larch plantations with different stand
ages, four stand ages (15 a, 24 a, 35 a, and 44 a) of larch plantations in Saihanba Mechanical Forest
Farm were selected as the research subjects. The litterbag method was employed for decomposition experiments
to analyze the nutrient release characteristics of litter at different decomposition stages across various
stand ages. The results showed that the total mass loss rate of litter was the highest in the 44 a larch
plantation, followed by 35 a, 24 a, and 15 a. The half-life and turnover period were the shortest in the
44 a larch plantation. The mass fractions of nitrogen, potassium, and carbon in the litter were the highest
in the 15 a larch plantation and gradually decreased with increasing stand age. There were significant differences in the release rates of nitrogen, phosphorus, potassium, and carbon among different stand age
groups, with the release rates gradually increasing as the stand age increased. Compared to other stand ages,
the 44 a and 35 a larch plantations accumulated more litter nutrients, had easier nutrient release,
and exhibited faster decomposition rates. This study aims to reveal the patterns of litter decomposition and
nutrient release in larch plantations of different stand ages. |
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