华南亚热带不同树龄桉树人工林叶片、凋落物和土壤的生态化学计量学特征

IF 0.6 4区 环境科学与生态学 Q4 ECOLOGY
C.H. Xu, C. Hu, Z. Zhang, X. Peng, G. Hu
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引用次数: 0

摘要

. 了解桉树人工林不同林龄生长的生态化学计量特征,是评价人工林管理措施对生态系统生物地球化学循环影响的基础。研究了3年、6年、9年和12年大尾叶桉人工林叶片、凋落物和土壤化学计量的关系。结果表明:(1)随着林龄的增加,叶片和凋落物中TN(总氮)和TP(总磷)浓度逐渐升高。叶片总碳(TC)浓度逐渐降低,凋落物TC浓度先升高后降低,土壤中TC和TN浓度相反。土壤TC和TN浓度随土层深度的增加而降低。(2) C:N、C:P、N:P的比值为凋落叶>;随着林龄的增加,叶片和凋落物的C:N和C:P逐渐降低,土壤的C:N、C:P和N:P的比值波动较大。(3)土壤C、N与凋落物P呈显著负相关,叶片C:N与凋落物C:P呈显著正相关。研究结果可为巨尾桉人工林的管理提供科学依据。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
ECOLOGICAL STOICHIOMETRIC CHARACTERISTICS OF LEAF, LITTER, AND SOIL IN EUCALYPTUS PLANTATIONS WITH DIFFERENT AGES IN SUBTROPICAL, SOUTH CHINA
. Understanding the ecological stoichiometry in the growth of different stand ages of Eucalyptus plantations is essential to evaluate the effects of management practices on biogeochemical cycling in plantation forest ecosystems. The study examined the relationship between leaf, litter, and soil stoichiometry on 3-, 6, 9-and 12-year-old Eucalyptus grandis x urophylla plantations in subtropical China. Results showed that (1) With increased stand age, the concentrations of TN (total nitrogen) and TP (total phosphorus) in leaf and litter increased gradually. Leaf TC (total carbon) concentration decreased gradually, litter TC concentration initially increased and then decreased, and the concentrations of TC and TN in soil were opposite. Soil TC and TN concentrations decreased with increasing soil depth. (2) The ratios of C:N, C:P, N:P were litter > leaf > soil. With increasing stand age, C:N and C:P of leaf and litter decreased gradually, while the ratios of C:N, C:P, N:P of soil fluctuated greatly. (3) There were significant negative correlations between the C, N of soil and litter P and significant positive correlation was between the leaf C:N and litter C:P. The main limiting element was P. The results of this study can provide a scientific basis for the management of Eucalyptus grandis x urophylla plantations.
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来源期刊
Applied Ecology and Environmental Research
Applied Ecology and Environmental Research ECOLOGY-ENVIRONMENTAL SCIENCES
CiteScore
1.40
自引率
14.30%
发文量
104
审稿时长
14 months
期刊介绍: The Journal publishes original research papers and review articles. Researchers from all countries are invited to publish pure or applied ecological, environmental, biogeographical, zoological, botanical, paleontological, biometrical-biomathematical and quantitative ecological or multidisciplinary agricultural research of international interest on its pages. The focus is on topics such as: -Community, ecosystem and global ecology- Biometrics, theoretical- and quantitative ecology- Multidisciplinary agricultural and environmental research- Sustainable and organic agriculture, natural resource management- Ecological methodology, monitoring and modeling- Biodiversity and ecosystem research, microbiology, botany and zoology- Biostatistics and modeling in epidemiology, public health and veterinary- Earth history, paleontology, extinctions, biogeography, biogeochemistry- Conservation biology, environmental protection- Ecological economics, natural capital and ecosystem services- Climatology, meteorology, climate change, climate-ecology. The Journal publishes theoretical papers as well as application-oriented contributions and practical case studies. There is no bias with regard to taxon or geographical area. Purely descriptive papers (like only taxonomic lists) will not be accepted for publication.
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