不同灌溉方式对有机肥碳矿化及土壤活性有机质含量影响  

Effects of Different Irrigation Patterns on Mineralization of Organic Manure Carbon and Contents of Soil Labile Organic Matter

作　　者：王娇[1] 张玉龙[1] 张玉玲[1] 金烁[1] 韩琳[1] 

机构地区：[1]沈阳农业大学土地与环境学院/农业部东北土壤与环境重点开放实验室,沈阳110866

出　　处：《沈阳农业大学学报》2010年第1期37-41,共5页Journal of Shenyang Agricultural University

基　　金：辽宁省农业科技攻关重大项目(2008212003);辽宁省教育厅创新团队项目(2007T156)

摘　　要：用测定有机碳矿化速率及土壤活性有机质含量变化的方法,探讨有机质含量与活性有机质含量的相关性,研究不同灌溉方法对保护地土壤有机质积累-矿化的影响。结果表明:在有机肥施入保护地土壤的90d内,有机碳矿化率沟灌为42.94%～47.19%,滴灌为48.51%～53.54%,渗灌为42.04%～45.77%,其大小顺序为滴灌>沟灌>渗灌;而同一灌溉处理有机肥有机碳矿化率为:2g·kg-1土>4g·kg-1土>6g·kg-1土>8g·kg-1土。活性有机质含量变化也因灌溉方式及有机肥用量而异,滴灌与渗灌处理的活性有机质含量变化趋势相似,沟灌则与滴灌、渗灌有较大差异;就有机肥用量而言,某一时间的活性有机质含量为:8g·kg-1土>6g·kg-1土>4g·kg-1土>2g·kg-1土。灌溉方式与有机肥用量对活性有机质含量的影响差异极显著,且灌溉方法与有机肥用量之间存在交互作用。By determining the mineralization rate of organic carbon and the contents of soil active organic matter,the effects of different irrigation patterns on accumulation-mineralization of organic carbon and the correlation of organic matter and labile organic matter were studed.The results showed that within 90 days,the mineralization rates of organic carbon in furrow irrigation were 42.94%～47.19%,in drip irrigation were 48.51%～53.54%,in subsurface irrigation were 42.04%～45.77%,the order were drip irrigationfurrow irrigationSubsurface irrigation.The trends of labile organic matter were different with irrigation patterns and application rates of organic manure.The change trends of active organic matter in drip irrigation treatment was similar with subsurface irrigation treatment.The impact of irrigation patterns and the application amount of organic manure on contents of labile organic matter were significant difference,and there were interactions between the irrigation patterns and the application amounts of organic manure.

关 键 词：渗灌 滴灌 沟灌 有机肥 活性有机质 

分 类 号：S153.621[农业科学—土壤学]