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• 研究报告 • 上一篇    

森林转化对乔木地上部分与土壤的碳氮储量及分配格局的影响

刘骏1,薛莉1,田地1,许文斌1,汤行昊2,习丹1,丘清燕1*,胡亚林1   

  1. 1福建农林大学林学院森林生态稳定同位素研究中心, 福州 350002;2福建省林业科学研究院, 福州 350012)
  • 出版日期:2018-10-10

Effects of forest conversion on carbon and nitrogen storage and distribution of the aboveground part of trees and soil.

LIU Jun1, XUE Li1, TIAN Di1, XU Wen-bin1, TANG Xing-hao2, XI Dan1, QIU Qing-yan1*, HU Ya-lin1   

  1. (1Forest Ecology-Stable Isotope Research Center, College of Forestry, Fujian Agriculture and Forestry University, Fuzhou 350002, China; 2Fujian Research Institute of Forestry, Fuzhou 350012, China).
  • Online:2018-10-10

摘要: 森林变化影响其碳氮储量,准确评估碳氮储量是森林碳汇管理的重要理论依据。本研究以福建南平天然常绿阔叶林、闽楠人工林、樟树人工林、杉木人工林为对象,采用野外调查研究方法,比较了福建省重要森林生态系统地上生物量和土壤碳库和氮库储量。结果表明:天然林、闽楠人工林、樟树人工林、杉木人工林生态系统碳储量分别为215.68、207.50、120.14、207.53 t·hm-2,氮储量分别为7.73、11.50、9.20、9.05 t·hm-2;地上部分碳、氮储量最高的为天然林,而土壤碳、氮储量最高的为杉木林;杉木林叶片与表层土壤的C∶N最高;从空间上看,天然林向人工林的转换改变了碳、氮的分配格局,天然林植被部分具有较高的碳、氮储量,应在后期的经营措施中加以保护。

关键词: 秸秆覆盖, 功能稳定性, 土壤微生物性质, 干扰, 节水农业

Abstract: Forest conversion affects ecosystem carbon (C) and nitrogen (N) storage. The accurate assessment of forest C and N storage is an important theoretical basis for forest C sink management. In this study, we measured C and N storage in broad-leaved evergreen natural forest (BE),Phoebe bournei plantation (PB), Cinnamomum bodinieriplantation (CB), and Cunninghamia lanceolata plantation (CL) at Nanping in Fujian Province. The C and N storage in aboveground biomass and soil was  compared. The results showed that ecosystem C storage of AF, PB, NS, and PA was 215.68, 207.50, 120.14, 207.53 t·hm-2, and N storage was 7.73,11.50, 9.20, 9.05 t·hm-2, respectively. The C and N storage in aboveground biomass was the highest in BE, while CL had the highest soil C and N storage. C∶N ratios in both leaf and surface soil were highest in CL. Spatially, the conversion of natural forest to plantation forest altered C and N distribution patterns. The natural forest ecosystems had higher C and N storage, which should be protected in future management.

Key words: straw mulch, functional stability, soil microbiological properties, perturbation, water-saving agriculture