长期施肥与地膜覆盖对土壤微生物量碳氮的影响  

Effect of long-term fertilization and plastic film-mulching on soil microbial biomass carbon and nitrogen

作　　者：薛菁芳[1] 高艳梅[2] 汪景宽[1] 

机构地区：[1]沈阳农业大学土地与环境学院,辽宁沈阳110161 [2]南京农业大学资源与环境学院,江苏南京210095

出　　处：《中国土壤与肥料》2007年第3期55-58,共4页Soil and Fertilizer Sciences in China

基　　金：国家重点基础研究发展(973)规划项目(2005CB121108)资助

摘　　要：通过田间定位试验研究长期施肥与地膜覆盖对土壤微生物量C、N的影响。结果表明,长期施肥与地膜覆盖提高了土壤微生物量C、N含量,长期施有机肥和有机无机肥配施,土壤微生物量C、N显著高于单施化肥和不施肥。相关分析表明,土壤微生物量C、N与土壤有机C、全N均呈极显著的正相关。土壤微生物量C、N可作为指示土壤肥力的重要指标。本试验土壤微生物量C占有机C的比例平均为9.95%,微生物量N占全N的比例平均为10.78%。Effect of long - term fertilization and mulching on soil microbial biomass carbon and nitrogen was studied according to the data of a long- term brown earth located experiment. Long- term fertilization and mulching increased soil microbial biomass carbon （Bc） and microbial biomass nitrogen （BN）. Bc and BN of treatments applied manure, chemical fertilizer and manure combined were obviously higher than those of application of chemical fertilizer single or no fertilization. The results of correlation analysis showed that Bc and BN significantly correlated to organic carbon and total nitrogen. Bc and BN could be considered as an important indicator for soil fertility assessment.

关 键 词：施肥 地膜覆盖 微生物量碳 氮 

分 类 号：S158[农业科学—土壤学]