应用生态学报2015，Vol.26Issue(1)：122-128,7.
耕作方式对绿洲灌区农田土壤有机碳及其分布的影响
Effects of tillage type on soil organic carbon and its distribution in oasis irrigation area
摘要
Abstract
A long-term trial was established in 2005 in the oasis irrigation area to determine the impact on the accumulation and distribution of total organic carbon (TOC),particulate organic carbon (POC) and soil microbial biomass carbon (SMBC) in 0-90 cm soil layer of 4 types of tillage including conventional tillage (CT),fresh raised-bed (FRB),permanent raised-bed (PRB) and zero tillage with control traffic on flat field (ZT).The results revealed that the distribution characteristics of TOC,POC and SMBC in the soil profile were similar in the four tillage treatments,and the carbon content decreased with depth,meanwhile the difference among treatments gradually decreased.PRB significantly increased the TOC,POC contents and SMBC,which presented in the order of PRB＞ZT＞FRB＞CT in the 0-90 cm soil layer.In 0-10 cm soil layer,the TOC was increased by 11.1％-24.8％ for PRB,9.1％-18.7％ for ZT and 7.8％-8.2％ for FRB when compared with CT; POC was increased by 24.1％-26.5％ for PRB,17.3％-18.7％ for ZT,and-8.2％ to 10.8％ for FRB; SMBC was increased by 20.5％-28.3％ for PRB,10.4％-15.2％ for ZT and 3.5％-3.7％ for FRB.TOC had a significant promotion effect on POC.PRB significantly increased the proportion of soil POC and enhanced the overall accumulation of organic carbon.关键词
土壤总有机碳/土壤颗粒态有机碳/土壤微生物生物量碳/固定道耕作/绿洲灌区Key words
TOC/ POC/ SMBC/ controlled traffic farming/ oasis irrigation area分类
农业科技引用本文复制引用
马忠明,吕晓东,刘莉莉..耕作方式对绿洲灌区农田土壤有机碳及其分布的影响[J].应用生态学报,2015,26(1):122-128,7.基金项目
国家自然科学基金项目(31160128)资助. （31160128）
