IMHE OpenIR  > 山地表生过程与生态调控重点实验室
Soil Carbon and Nitrogen Changes following Afforestation of Marginal Cropland across a Precipitation Gradient in Loess Plateau of China
Ruiying Chang; Tiantian Jin; Yihe Lü; Guohua Liu; Bojie Fu
Corresponding AuthorBojie Fu
2014-01
Source PublicationPLOS ONE
Volume9Issue:1Pages:e85426
Abstract
Cropland afforestation has been widely found to increase soil organic carbon (SOC) and soil total nitrogen (STN); however,the magnitudes of SOC and STN accumulation and regulating factors are less studied in dry, marginal lands, and therein theinteraction between soil carbon and nitrogen is not well understood. We examined the changes in SOC and STN in younger(5–9-year-old) and older (25–30-year-old) black locust (Robinia pseudoacacia L., an N-fixing species) plantations that were established on former cropland along a precipitation gradient (380 to 650 mm) in the semi-arid Loess Plateau of China. The SOC and STN stocks of cropland and plantations increased linearly with precipitation increase, respectively, accompanying an increase in the plantation net primary productivity and the soil clay content along the increasing precipitation gradient.
The SOC stock of cropland decreased in younger plantations and increased in older plantations after afforestation, and the amount of the initial loss of SOC during the younger plantations’ establishment increased with precipitation increasing. By
contrast, the STN stock of cropland showed no decrease in the initial afforestation while tending to increase with plantation age, and the changes in STN were not related to precipitation. The changes in STN and SOC showed correlated and were
precipitation-dependent following afforestation, displaying a higher relative gain of SOC to STN as precipitation decreased.
Our results suggest that the afforestation of marginal cropland in Loess Plateau can have a significant effect on the accumulation of SOC and STN, and that precipitation has a significant effect on SOC accumulation but little effect on STN retention. The limitation effect of soil nitrogen on soil carbon accumulation is more limited in the drier area rather than in the wetter sites.
KeywordLoess Plateau Soil Carbon And Nitrogen Changes
DOI10.1371/journal.pone.008542
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Indexed BySCI
Language英语
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Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/7500
Collection山地表生过程与生态调控重点实验室
Corresponding AuthorBojie Fu
Recommended Citation
GB/T 7714
Ruiying Chang,Tiantian Jin,Yihe Lü,et al. Soil Carbon and Nitrogen Changes following Afforestation of Marginal Cropland across a Precipitation Gradient in Loess Plateau of China[J]. PLOS ONE,2014,9(1):e85426.
APA Ruiying Chang,Tiantian Jin,Yihe Lü,Guohua Liu,&Bojie Fu.(2014).Soil Carbon and Nitrogen Changes following Afforestation of Marginal Cropland across a Precipitation Gradient in Loess Plateau of China.PLOS ONE,9(1),e85426.
MLA Ruiying Chang,et al."Soil Carbon and Nitrogen Changes following Afforestation of Marginal Cropland across a Precipitation Gradient in Loess Plateau of China".PLOS ONE 9.1(2014):e85426.
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