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| 施肥对麻栎人工林碳密度及休眠期土壤呼吸的影响 | |
| 引用本文： | 葛乐,成向荣,段溪,虞木奎,刘志龙. 施肥对麻栎人工林碳密度及休眠期土壤呼吸的影响[J]. 生态学杂志, 2012, 31(2): 248-253 |
| 作者姓名： | 葛乐 成向荣 段溪 虞木奎 刘志龙 |
| 作者单位： | 1. 中国林业科学研究院亚热带林业研究所,浙江富阳,311400 2. 中国林业科学研究院亚热带林业研究所,浙江富阳311400;南京林业大学森林资源与环境学院,南京210037 3. 中国林业科学研究院热带林业实验中心,广西凭祥,532600 |
| 基金项目： | 引进国际先进林业科学技术项目，林业公益性行业科研专项 |
| 摘 要： | 以安徽省滁州市红琊山林场麻栎人工林为研究对象,测定了4种施肥处理(0、0.15、0.30和0.45kg·株-1)林分碳密度,并采用开沟隔离法对不同处理林分休眠期土壤呼吸组分进行测定。结果表明:4种施肥处理林分总碳密度分别为73.68、84.49、87.20和91.70t·hm-2。与对照相比,各施肥处理麻栎树干碳密度、树枝碳密度和枯落物碳密度均有极显著提高(P<0.01)。不同处理林分的土壤总呼吸速率和异养呼吸速率随着施肥量增加呈递增趋势,施肥量为0.45kg·株-1样地土壤总呼吸速率和异养呼吸速率较对照样地分别增加了48.9%和38.6%。不同施肥样地土壤异养呼吸对土壤总呼吸的贡献率远大于根系呼吸,施肥量为0、0.15、0.30和0.45kg·株-1时分别是根系呼吸的5.0、3.8、3.4和3.2倍。土壤呼吸受生物因子和非生物因子共同调控,在所选取的4个指标中(土壤含水量、土壤C/N、根生物量和枯落物有机碳含量),土壤含水量和枯落物有机碳含量与土壤总呼吸及土壤异养呼吸速率均有显著相关性(P<0.05)。 |
| 关 键 词： | 麻栎人工林 碳密度 土壤异养呼吸 根系呼吸 |
Effects of fertilization on the carbon density of sawtooth oak plantations and the soil respiration in dormant period |
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| GE Le , CHENG Xiang-rong , DUAN Xi , YU Mu-kui , LIU Zhi-long. Effects of fertilization on the carbon density of sawtooth oak plantations and the soil respiration in dormant period[J]. Chinese Journal of Ecology, 2012, 31(2): 248-253 | |
| Authors: | GE Le CHENG Xiang-rong DUAN Xi YU Mu-kui LIU Zhi-long |
| Affiliation: | 1 Institute of Subtropical Forestry, Chinese Academy of Forestry, Fuyang 311400, Zhejiang, China; 2 College of Forest Resources and Environment, Nanjing Forestry University, Nanjing 210037, China; 3 Experiment Center of Tropical Forestry, Chinese Academy of Forestry, Pingxiang 532600, Guangxi, China) |
| Abstract: | This paper measured the carbon density of the sawtooth oak (Quercus acutissima Carr.) plantations in Hongyashan Forestry Farm of Chuzhou City, Anhui Province of East China under different fertilization treatments (0, 0.15, 0.30, and 0.45 kg·tree-1), and determined the soil respiration components in dormant period by the method of trenching for separation. In the treatments 0, 0.15, 0.30, and 0.45 kg·tree-1, the total carbon density of the stands was 73.68, 84.49, 87.20, and 91.70 t·hm-2, respectively. As compared with treatment 0 kg·tree-1, the carbon densities of the stem, branch, and litter in the other three fertilization treatments increased significantly (P<0.01). The soil total and heterotrophic respiration rates increased with increasing fertilization rate, being 48.9% and 38.6% higher in treatment 0.45 kg·tree-1 than in treatment 0 kg·tree-1, respectively. Compared with root respiration, soil heterotrophic respiration had a far greater contribution to the soil total respiration. In the treatments 0, 0.15, 0.30, and 0.45 kg·tree-1, the contribution rate of soil heterotrophic respiration was 5.0, 3.8, 3.4, and 3.2 times of that of root respiration, respectively. The soil respiration was controlled by both abiltic and biotic factors, among which, soil moisture content and litter carbon content correlated significantly to the soil total respiration and heterotrophic respiration (P<0.05). |
| Keywords: | sawtooth oak plantation carbon density soil heterotrophic respiration root respiration |
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