新疆干旱区8种常见灌丛生物量碳和土壤有机碳特征  

Characteristics of biomass carbon and soil organic carbon of 8 common shrubs in arid regions of Xinjiang

作　　者：王鑫[1,2,3,4] 杨德刚[1] 熊黑钢[2] 柳妍妍[1,2,3] 公延明[1,2,3] 

机构地区：[1]中国科学院新疆生态与地理研究所,乌鲁木齐830011 [2]新疆大学资源与环境科学学院,乌鲁木齐830046 [3]中国科学院大学,北京100049 [4]中国科学院新疆分院,乌鲁木齐830011

出　　处：《生态学杂志》2016年第8期1996-2002,共7页Chinese Journal of Ecology

基　　金：新疆青年科学基金项目(2013211B41)资助

摘　　要：对广布于新疆南北疆各地的8种灌丛(白刺Nitraria tangutorum、高枝假木贼Anabasis elatior、白梭梭Haloxylon persicum、沙拐枣Calligonum mongolicum、狭叶锦鸡儿Caragana stenophylla、膜果麻黄Ephedra przewalskii、短叶假木贼Anabasis brevifolia和金露梅Potentilla fruticosa)生物量碳和土壤有机碳的分布特征进行了研究。结果表明:1)生物量碳密度金露梅>狭叶锦鸡儿>膜果麻黄>白梭梭>沙拐枣>白刺>短叶假木贼>高枝假木贼。除金露梅灌丛地上生物量碳密度高于地下外,其余7种灌丛地下生物量碳密度均高于地上。2)土壤有机碳与生物量碳密切相关,除膜果麻黄、短叶假木贼和金露梅灌丛外,其余5种灌丛土壤有机碳密度最高值均出现在0~10 cm土层,且随土壤深度的增加而降低。3)新疆地区植物8种灌丛生物量碳储量和土壤有机碳储量分别在(0.41±0.05)×104^(33.46±0.60)×104Mg和(0.22±0.01)^(6.88±0.03)Tg。4)土壤有机碳与海拔呈显著正相关(P<0.05),与土壤含水量、有机质、全N含量呈极显著正相关(P<0.01),与容重呈显著负相关;地上生物量碳与海拔、土壤含水量呈显著正相关,与土壤有机质、全N含量、有机碳、地下生物量碳呈极显著正相关;地下生物量碳与土壤有机质、全N含量呈极显著正相关。In this study, plants and soil samples were collected from 8 dominant shrub communi- ties including Nitraria tangutorum, Anabasis elatior, Haloxylon persicum, Calligonum mongoli- cum, Caragana stenophylla, Ephedra przewalskii, A. brevifolia and Potentilla fruticose that exten- sively distribute in Xinjiang. By determining the contents of plant biomass carbon （ PBC ） and soil organic carbon （SOC） , this study aimed at assessing the variation of PBC and SOC contents among the different shrub communities. The results showed that ： （ 1 ） The values of PBC density from different shrub communities exhibited the following pattern： P. fruticose 〉 C. stenophylla 〉 E. przewalskii 〉 H. persicum 〉 C. mongolicum 〉 N. tangutorurn 〉 A. breviJolia 〉 A. elatior. Ex- cept for P. fruticose, the other shrub communities＇ underground PBC densities were higher than those above ground. （2） The SOC density was strongly related to the PBC density. Except for E. przewalskii, A. brevifolia and P. fruticose species, the other shrub communities＇ maximum SOC densities occurred in 0-10 cm soil layer, and decreased with the increase of soil depth. （3） The storage values of PBC and SOC in the eight shrub communities ranged from （0.41±0.05） ×10^4 to （33.46±0.60） ×10^4 Mg and from （0.22±0.01） to （6.88±0.03） Tg, respectively. （4） The SOC content was significantly positively correlated to altitude （P 〈 0.05）, very significantly posi- tively correlated to soil water content, and soil organic matter （SOM） and total nitrogen （TN） contents （P 〈 0. 01 ）, while significantly negatively correlated to soil bulk density. The aboveground PBC content was significantly positively correlated to altitude and soil water content, and very significantly positively while a very SOM and TN significant positive contents correlated to SOM, TN, SOC and underground PBC contents, correlation was observed between underground PBC content and SOM and TN contents.

关 键 词：灌丛 生物量碳 土壤有机碳 环境因子 

分 类 号：Q948.1[生物学—植物学]