SONG Bianlan,GUAN Jinhong,DU Sheng.Carbon and Nitrogen Densities and Their Allocation Characteristics in A Black Locust Plantation and An Oak Forest in the Loess Hilly Region[J].Research of Soil and Water Conservation,2016,23(04):55-59,65.
黄土丘陵区刺槐、辽东栎林碳氮密度及其分配特征
- Title:
- Carbon and Nitrogen Densities and Their Allocation Characteristics in A Black Locust Plantation and An Oak Forest in the Loess Hilly Region
- Keywords:
- carbon and nitrogen contents; carbon and nitrogen densities; Black locust plantation; Oak forest; Loess hilly region
- 分类号:
- S718.5
- 摘要:
- 选取黄土丘陵区刺槐人工林和辽东栎天然次生林2个典型森林群落为研究对象，比较分析了各组分的有机碳和全氮含量与储量及分配特征。结果表明：刺槐和辽东栎林植被层的碳含量总体上呈现沿垂直方向的递减趋势，即乔木层 > 灌木层 > 草本层 > 凋落物层；不同器官部位的碳含量呈现为：叶、干 > 枝 > 根，草本层地上部碳含量高于地下部。氮含量变化趋势不显著。辽东栎林生态系统碳密度为165.86 t/hm2，高于刺槐林生态系统（138.93 t/hm2），而两者的氮密度差异不大。两生态系统碳氮密度的各部分排序为土壤 > 乔木层 > 凋落物层 > 林下植被层，土壤层（0—100 cm）的碳密度占生态系统碳库总量的51.1%~53.6%，而氮密度占71.4%~84.4%，表明控制水土流失对维持研究区的生态环境及土壤固碳潜力至关重要。
- Abstract:
- We examined the contents and distribution characteristics of organic carbon and total nitrogen in a black locust plantation and a natural oak forest in the semiarid loess hilly region. The results showed that:carbon contents in vegetation layers declined vertically in the order:arbor layer > shrub and herb layer > litter layer; leaf and stem > branch > root in arbor and shrub layers, whereas aboveground components > underground components in the herb layer. The ecosystem carbon density was higher in the oak forest (165.86 t/hm2) than that of the locust plantation (138.93 t/hm2). The ecosystem nitrogen density showed no significant differences between the two communities. The distribution of carbon and nitrogen densities ranked in the order:soil layer > arbor layer > litter layer > shrub and herb layers. The soil carbon density accounted for 51.1%~53.6% of the total ecosystem carbon density. The soil nitrogen density accounted for 71.4%~84.4% of the total ecosystem nitrogen density. The results suggest that controlling soil and water loss is important to maintain the ecological environment and soil carbon sequestration potential in this area.
参考文献/References:
[1] 刘国彬,李敏,上官周平,等.西北黄土区水土流失现状与综合治理对策[J].中国水土保持科学,2008,6(1):16-21.
[2] Ceulemans R, Janssens I A, Jach M E. Effects of CO2 enrichment on trees and forests:Lessons to be learned in view of future ecosystem studies[J]. Annals of Botany, 1999,84(5):577-590.
[3] Reich P B, Hobbie S E, Lee T, et al. Nitrogen limitation constrains sustainability of ecosystem response to CO2[J]. Nature, 2006,440(7086):922-925.
[4] Woodwell G M, Whittaker R H, Reiners W A, et al. The biota and the world carbon budget[J]. Science,1978,199(4325):141-146.
[5] 刘华,雷瑞德.我国森林生态系统碳储量和碳平衡的研究方法及进展[J].西北植物学报,2005,25(4):835-843.
[6] 王效科,白艳莹,欧阳志云,等.全球碳循环中的失汇及其形成原因[J].生态学报,2002,22(1):94-103.
[7] 康惠宁,马钦彦.中国森林C汇功能基本估计[J].应用生态学报,1996,7(3):230-234.
[8] 周广胜,王玉辉,蒋延玲,等.陆地生态系统类型转变与碳循环[J].植物生态学报,2002,26(2):250-254.
[9] 朱志诚.陕北黄土高原森林区植被恢复演替[J].西北林学院学报,1993,8(1):87-94.
[10] 张长庆,张文辉.黄土高原不同立地条件下刺槐人工林种群的无性繁殖与更新[J].西北农林科技大学学报:自然科学版,2009,37(1):135-144.
[11] 张柏林,陈存根.长武县红星林场刺槐人工林的生物量和生产量[J].陕西林业科技,1992(3):13-17.
[12] 张柏林.子午岭地区辽东栎林生物生产量的研究[J].西北林学院学报,1990,5(1):1-7.
[13] 王绍强,周成虎,罗承文.中国陆地自然植被碳量空间分布特征探讨[J].地理科学进展,1999,18(3):238-244.
[14] 黄松殿,吴庆标,廖克波,等.观光木人工林生态系统碳储量及其分布格局[J].生态学杂志,2011,30(11):2400-2404.
[15] 周玉荣,于振良,赵士洞.我国主要森林生态系统碳贮量和碳平衡[J].植物生态学报,2000,24(5):518-522.
[16] 王效科,冯宗炜.中国森林生态系统中植物固定大气碳的潜力[J].生态学杂志,2000,19(4):72-74.
[17] 李意德,方精云.尖峰岭热带山地雨林群落生产和二氧化碳同化净增量的初步研究[J].植物生态学报,1998,22(2):127-134.
备注/Memo
收稿日期:2015-05-18;改回日期:2015-07-20。
基金项目:中国科学院战略性先导科技专项（XDA05050202）；国家自然科学基金（41171419，41411140035）
作者简介:宋变兰(1978-),女,山西省静乐县人,在读博士生,主要研究方向为森林生态、流域生态与管理。E-mail:sxbgld666@163.com
通讯作者:杜盛(1965-),男,内蒙古鄂尔多斯人,博士,研究员,主要研究方向为森林生态、流域生态与管理。E-mail:shengdu@ms.iswc.ac.cn