Arid
DOI10.1371/journal.pone.0042927
Comparing Soil Organic Carbon Dynamics in Perennial Grasses and Shrubs in a Saline-Alkaline Arid Region, Northwestern China
Zhou, Yong1,2; Pei, Zhiqin1; Su, Jiaqi1,2; Zhang, Jingli1,2; Zheng, Yuanrun1; Ni, Jian1; Xiao, Chunwang1; Wang, Renzhong1
通讯作者Zhou, Yong
来源期刊PLOS ONE
ISSN1932-6203
出版年2012
卷号7期号:8
英文摘要

Background: Although semi-arid and arid regions account for about 40% of terrestrial surface of the Earth and contain approximately 10% of the global soil organic carbon stock, our understanding of soil organic carbon dynamics in these regions is limited.


Methodology/Principal Findings: A field experiment was conducted to compare soil organic carbon dynamics between a perennial grass community dominated by Cleistogenes squarrosa and an adjacent shrub community co-dominated by Reaumuria soongorica and Haloxylon ammodendron, two typical plant life forms in arid ecosystems of saline-alkaline arid regions in northwestern China during the growing season 2010. We found that both fine root biomass and necromass in two life forms varied greatly during the growing season. Annual fine root production in the perennial grasses was 45.6% significantly higher than in the shrubs, and fine root turnover rates were 2.52 and 2.17 yr(-1) for the perennial grasses and the shrubs, respectively. Floor mass was significantly higher in the perennial grasses than in the shrubs due to the decomposition rate of leaf litter in the perennial grasses was 61.8% lower than in the shrubs even though no significance was detected in litterfall production. Soil microbial biomass and activity demonstrated a strong seasonal variation with larger values in May and September and minimum values in the dry month of July. Observed higher soil organic carbon stocks in the perennial grasses (1.32 Kg C m(-2)) than in the shrubs (1.12 Kg C m(-2)) might be attributed to both greater inputs of poor quality litter that is relatively resistant to decay and the lower ability of microorganism to decompose these organic matter.


Conclusions/Significance: Our results suggest that the perennial grasses might accumulate more soil organic carbon with time than the shrubs because of larger amounts of inputs from litter and slower return of carbon through decomposition.


类型Article
语种英语
国家Peoples R China
收录类别SCI-E
WOS记录号WOS:000307380900085
WOS关键词PLANT LITTER DECOMPOSITION ; MICROBIAL BIOMASS DYNAMICS ; FINE-ROOT DYNAMICS ; TERRESTRIAL ECOSYSTEMS ; PATAGONIAN MONTE ; DESERT ; NITROGEN ; PATTERNS ; CLIMATE ; GRASSLAND
WOS类目Multidisciplinary Sciences
WOS研究方向Science & Technology - Other Topics
来源机构中国科学院植物研究所
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/174550
作者单位1.Chinese Acad Sci, State Key Lab Vegetat & Environm Change, Inst Bot, Beijing, Peoples R China;
2.Chinese Acad Sci, Grad Sch, Beijing, Peoples R China
推荐引用方式
GB/T 7714
Zhou, Yong,Pei, Zhiqin,Su, Jiaqi,et al. Comparing Soil Organic Carbon Dynamics in Perennial Grasses and Shrubs in a Saline-Alkaline Arid Region, Northwestern China[J]. 中国科学院植物研究所,2012,7(8).
APA Zhou, Yong.,Pei, Zhiqin.,Su, Jiaqi.,Zhang, Jingli.,Zheng, Yuanrun.,...&Wang, Renzhong.(2012).Comparing Soil Organic Carbon Dynamics in Perennial Grasses and Shrubs in a Saline-Alkaline Arid Region, Northwestern China.PLOS ONE,7(8).
MLA Zhou, Yong,et al."Comparing Soil Organic Carbon Dynamics in Perennial Grasses and Shrubs in a Saline-Alkaline Arid Region, Northwestern China".PLOS ONE 7.8(2012).
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