保护性耕作对太行山前平原土壤热水解和酸解有机碳的影响_杜章留.pdfVIP

2013,46(11):2249-2256 Scientia Agricultura Sinica doi: 10.3864/j.issn.0578-1752.2013.11.008 1 2 3 100081 100193 050021 · Influences of Conservation Tillage on Soil Carbon Extracted by Hot Water and Acid Hydrolysis in the Piedmont Region of Taihang Mountains 1 2 3 DU Zhang-liu , REN Tu-sheng , HU Chun-sheng 1 ( Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing 100081; 2College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193; 3Center for Agricultural Resources Research, Institute of Genetic and Developmental Biology, Chinese Academy of Sciences, Shijiazhuang 050021) Abstract: Objective The objective of this study was to investigate the profile distribution of soil carbon extracted by hot water and acid hydrolysis after shifting from conventional tillage to conservation tillage systems.Method The field experiment, initiated from 2001 in Luancheng County of Hebei Province, included four tillage treatments for winter wheat: moldboard plow without corn residue (CK), moldboard plow with corn residue (CT), rotary tillage with corn residue (RT), and no-till with corn residue (NT). After winter wheat harvest in 2007, soil samples were collected at 0-30 cm depth in four increments (0-5, 5-10, 10-20, and 20-30 cm). Soil labile carbon was extracted by hot water (HWC, 80 for 24 h) and ac