DOI: 10.1007/s10533-015-0101-8
Scopus记录号: 2-s2.0-84930276797
论文题名: Lignin biochemistry and soil N determine crop residue decomposition and soil priming
作者: Stewart C.E. ; Moturi P. ; Follett R.F. ; Halvorson A.D.
刊名: Biogeochemistry
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2015
卷: 124, 期: 2018-01-03 起始页码: 335
结束页码: 351
语种: 英语
英文关键词: Decomposition
; Dissolved organic carbon
; Lignin
; Lignin biomarkers
; Nitrogen
; Temperature
Scopus关键词: biochemistry
; crop residue
; decomposition
; lignin
; maize
; millet
; nitrogen
; soil nutrient
; soil organic matter
; soil respiration
; wheat
; Glycine max
; Helianthus
; Triticum aestivum
; Zea mays
英文摘要: Residue lignin content and biochemistry are important properties influencing residue decomposition dynamics and native soil C loss through priming. The relative contribution of high lignin residues to soil organic matter (SOM) may be less than previously believed, be more sensitive to soil N status, and may be more sensitive to increased temperature. We examined the role of residue biochemistry, temperature, and soil N on the decomposition dynamics of five crop residues varying in lignin content and composition (corn, sorghum, soybean, sunflower and wheat). We used natural abundance δ13CO2 to quantify residue decomposition and soil priming from a soil previously cropped to wheat-fallow or to corn-millet-wheat at 20 and 30 °C in a laboratory incubation. High lignin residues decomposed more completely than low lignin residues, supporting a new model of SOM formation suggesting high lignin residues have a lower efficiency for stabilizing SOM due to inefficient microbial processing. However, residues with lower residue respiration had greater soil C respiration (soil priming). Residue SG lignin was positively related to residue C respired and H-lignin positively related to soil C respired in all soils and temperatures, resulting in no net lignin chemistry effect on the combined total C respired. Effects of lignin on residue decomposition were most apparent in treatments with lower soil N contents indicating N limitation. Measuring both residue and soil respiration and considering soil N status is important to accurately assess the effects of residue biochemistry on soil organic carbon. © 2015, The Author(s). Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/83503
Appears in Collections: 气候减缓与适应 气候变化事实与影响
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作者单位: USDA-ARS, 2150 Centre Ave, Bldg. D, Suite 100, Fort Collins, CO, United States; Central Research Institute for Dryland Agriculture, Santosh Nagar, Hyderabad, Andhra Pradesh, India
Recommended Citation:
Stewart C.E.,Moturi P.,Follett R.F.,et al. Lignin biochemistry and soil N determine crop residue decomposition and soil priming[J]. Biogeochemistry,2015-01-01,124(2018-01-03)