Depth profiles of soil carbon isotopes along a semi-arid grassland transect in northern China

[21] Ekblad A(2006)Carbon isotope ratios in belowground carbon cycle processes Geoderma 136 1108-1119

[22] Brunn M(2000)Patterns in decomposition rates among photosynthetic organisms: the importance of detritus C: N: P content Ecology 81 1853-1856

[23] Spielvogel S(2001)Phosphorus transformations along a large-scale climosequence in arid and semiarid grasslands of northern China Soil Sci Soc Am J 65 1965-1978

[24] Sauer T(2005)Carbon isotope discrimination during photosynthesis and the isotope ratio of respired CO Int J Climatol 25 13-26

[25] Oelmann Y(2015) in boreal forest ecosystems Biogeochemistry 124 528-544

[26] Campbell JE(2004)Stability of organic carbon in deep soil layers controlled by fresh carbon supply Environ Manag 33 1-15

[27] Fox JF(2016)Measurements of concentration, Plant Soil 409 1633-1640

[28] Davis CM(1988)C/ Soil Sci Soc Am J 52 1407-1421

[29] Rowe HD(2015)C and Glob Chang Biol 21 141-160

[30] Thompson N(2004)O/ Global Biogeochem Cy 18 752-755

[21] Ekblad A(2006)Carbon isotope ratios in belowground carbon cycle processes Geoderma 136 1108-1119

[22] Brunn M(2000)Patterns in decomposition rates among photosynthetic organisms: the importance of detritus C: N: P content Ecology 81 1853-1856

[23] Spielvogel S(2001)Phosphorus transformations along a large-scale climosequence in arid and semiarid grasslands of northern China Soil Sci Soc Am J 65 1965-1978

[24] Sauer T(2005)Carbon isotope discrimination during photosynthesis and the isotope ratio of respired CO Int J Climatol 25 13-26

[25] Oelmann Y(2015) in boreal forest ecosystems Biogeochemistry 124 528-544

[26] Campbell JE(2004)Stability of organic carbon in deep soil layers controlled by fresh carbon supply Environ Manag 33 1-15

[27] Fox JF(2016)Measurements of concentration, Plant Soil 409 1633-1640

[28] Davis CM(1988)C/ Soil Sci Soc Am J 52 1407-1421

[29] Rowe HD(2015)C and Glob Chang Biol 21 141-160

[30] Thompson N(2004)O/ Global Biogeochem Cy 18 752-755