TY - JOUR A1 - Xu, X. L. A1 - Ouyang, H. A1 - Cao, G. M. T1 - Nitrogen retention patterns and their controlling factors in an alpine meadow: implications for carbon sequestration JO - Biogeosciences Discuss. J1 - BGD VL - 4 IS - 4 SP - 2641 EP - 2665 Y1 - 2007/08/06 PB - Copernicus Publications SN - 1810-6277 UR - http://www.biogeosciences-discuss.net/4/2641/2007/ L1 - http://www.biogeosciences-discuss.net/4/2641/2007/bgd-4-2641-2007.pdf ER -