caa a22 4500 605516626 CHVBK 20210128100715.0 cr unu---uuuuu 210128e20150501xx s 000 0 eng 10.1007/s10533-015-0101-8 doi (NATIONALLICENCE)springer-10.1007/s10533-015-0101-8 Lignin biochemistry and soil N determine crop residue decomposition and soil priming [Elektronische Daten] [Catherine Stewart, Pratibha Moturi, Ronald Follett, Ardell Halvorson] 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. The Author(s), 2015 Decomposition nationallicence Lignin nationallicence Temperature nationallicence Nitrogen nationallicence Dissolved organic carbon nationallicence Lignin biomarkers nationallicence SOC : Soil organic carbon nationallicence C : Carbon nationallicence N : Nitrogen nationallicence WF : Wheat-fallow nationallicence CMW : Corn-millet-wheat nationallicence G : Guaiacyl nationallicence S : Syringyl nationallicence H : p-hydroxyphenyl nationallicence SG : Guaiacyl+syringyl nationallicence SOM : Soil organic matter nationallicence Py-GC/MS : Pyrolysis-gas chromatography-mass spectrometry nationallicence ADF : Acid detergent fiber nationallicence NDF : Neutral detergent fiber nationallicence AUR : Acid unhydrolyzable residue nationallicence DOC : Dissolved organic C nationallicence DN : Dissolved N nationallicence SUE : Substrate-use efficiency nationallicence Stewart Catherine USDA-ARS, 2150 Centre Ave, Bldg. D, Suite 100, 80526-8119, Fort Collins, CO, USA aut Moturi Pratibha Central Research Institute for Dryland Agriculture, Santosh Nagar, 500 059, Hyderabad, Andhra Pradesh, India aut Follett Ronald USDA-ARS, 2150 Centre Ave, Bldg. D, Suite 100, 80526-8119, Fort Collins, CO, USA aut Halvorson Ardell USDA-ARS, 2150 Centre Ave, Bldg. D, Suite 100, 80526-8119, Fort Collins, CO, USA aut Biogeochemistry Springer International Publishing 124/1-3(2015-05-01), 335-351 0168-2563 124:1-3<335 2015 124 10533 https://doi.org/10.1007/s10533-015-0101-8 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s10533-015-0101-8 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Stewart Catherine USDA-ARS, 2150 Centre Ave, Bldg. D, Suite 100, 80526-8119, Fort Collins, CO, USA aut NATIONALLICENCE 700 1- Moturi Pratibha Central Research Institute for Dryland Agriculture, Santosh Nagar, 500 059, Hyderabad, Andhra Pradesh, India aut NATIONALLICENCE 700 1- Follett Ronald USDA-ARS, 2150 Centre Ave, Bldg. D, Suite 100, 80526-8119, Fort Collins, CO, USA aut NATIONALLICENCE 700 1- Halvorson Ardell USDA-ARS, 2150 Centre Ave, Bldg. D, Suite 100, 80526-8119, Fort Collins, CO, USA aut NATIONALLICENCE 773 0- Biogeochemistry Springer International Publishing 124/1-3(2015-05-01), 335-351 0168-2563 124:1-3<335 2015 124 10533