原创《连栽桉树人工林土壤有机碳氮储量其分布特征》：本文关于人工林论文范文,可以做为相关论文参考文献,与写作提纲思路参考。
摘 要 采用时空互换法,以广西东门林场不同栽植代数（1、2和3代）桉树人工林和邻近区域马尾松人工林为研究对象,分析桉树人工林连栽过程中土壤有机碳、全氮含量和储量及其分布特征.结果表明：（1）在0～20 cm土层,马尾松和1代、2代、3代桉树人工林有机碳含量分别为17.06、15.70、14.47和13.16 g/kg,土壤全氮含量分别为0.895、0.841、0.778 和0.715 g/kg,均呈现随栽植代数的增加而下降的趋势,但在20～40 cm土层,马尾松和各栽植代数桉树林土壤有机碳和全氮含量无显著差异.（2）马尾松、1代、2代和3代桉树人工林0～40 cm土壤有机碳储量分别为66.84、56.57、52.97和50.81 t/hm2,土壤全氮储量分别为3.78、3.33、3.09和2.98 t/hm2,其中马尾松林和2、3代桉树林有机碳和全氮储量之间存在显著性差异（p<0.05）.（3）相关分析表明,马尾松和不同栽植代数桉树人工林土壤有机碳含量与全氮含量均存在极显著相关性（p<0.01）,土壤有机碳、全氮与C/N之间也存在显著的相关关系（p<0.05）.
关键词 桉树人工林；土壤有机碳；土壤全氮；贮量；C/N；连栽
中图分类号 S714.8 文献标识码 A
The Soil Organic Carbon and Nitrogen Storage and The Evolution Characteristics of Eucalyptus Plantations Under Successive Rotation
Lü Xiaoyan1, HE Bin1 *, WU Yongfu2, LAN Jun2, TENG Qiumei1
1 Forestry College of Guangxi University, Nanning, Guangxi 530004, China
2 Guangxi State Dongmen Forest Farm, Fusui, Guangxi 532108, China
Abstract The contents, storage and distribution of SOC and TN in the period of successive planting Eucalyptus were studied with the substitution method of space for time based on different generations（first-, second- and third-generations）Eucalyptus plantations and nearby Pinus massoniana plantation at Dongmen Forest Farm in Guangxi as objects. Following results were concluded： （1）The SOC content（0-20 cm）in P. massoniana plantations and the first, the second and third generations of Eucalyptus plantations was 17.06, 15.70, 14.47 and 13.16 g/kg, respectively, and the TN content（0-20 cm）was 0.895, 0.841, 0.778 and 0.715 g/kg, respectively. The contents of SOC and TN obviously decreased as continuous planting rotations increased. But there was no significant difference in the content of SOC and TN in the 20-40 cm soil.（2）The SOC storage amounts was 66.84, 56.57, 52.97 and 50.81 t/hm2, and the TN storage was 3.78, 3.33, 3.09 and 2.98 t/hm2, respectively. There were significant differences in the SOC and TN storage between P. massoniana plantation and the second and third generations Eucalyptus plantations（p<0.05）. （3）The correlation analysis showed that the SOC content was positively correlated（p<0.01）with TN content in different generations Eucalyptus plantations, and there was also a significant correlation between SOC, TN and C/N（p<0.05）.
Key words Eucalyptus plantations； soil organic carbon（SOC）； total nitrogen（TN）； storage； C/N； successive rotation
doi 10.3969/j.issn.1000-2561.2017.10.017
土壤是陸地生物生存极为重要的物质基础,也是森林生态系统研究的重要组成部分[1].土壤有机碳和氮素作为土壤养分的重要组成部分,深刻影响着土壤的各种理化性质、生物化学性质以及养分的积累.同时,土壤有机碳、氮作为陆地有机碳、氮的重要组成部分,是陆地生态系统中植物生长的主要限制因子,直接影响着森林生态系统乃至整个陆地生态系统的生产力和规模[2].研究表明,不同的土地利用方式的会导致植物群落的变迁,容易造成土壤碳、氮及其分配格局的不同[3-5],导致土地生产力的差异,从而影响整个生态系统的稳定性和可持续性.
人工林论文参考资料：
结论：连栽桉树人工林土壤有机碳氮储量其分布特征为适合人工林论文写作的大学硕士及相关本科毕业论文，相关我国人工林开题报告范文和学术职称论文参考文献下载。
