华南农业大学学报2016，Vol.37Issue(3)：29-36,8.DOI:10.7671/j.issn.1001-411X.2016.03.005
施肥对玉米／大豆套作土壤活性有机碳组分及碳库管理指数的影响
Effect of fertilization on soil active organic carbon and carbon pool management index under maize/soybean intercropping condition
摘要
Abstract
Objective]Effects of different fertilizer applications on organic carbon fraction and carbon pool management index in soil were investigated under maize /soybean intercropping condition .[Method]Taking no fertilization (CK) as the control, five different fertilizing treatments, which were chemical ni-trogen+phosphorus+potassium fertilizers ( NPK ) , 70%NPK+30% straw ( J1 ) , 70%NPK+30%cow dung (N1), 40%NPK+60%straw (J2) and 40%NPK+60% cow dung (N2) according to the same rates of N, P and K, were designed in a long-term field experiment.The contents of organic car-bon , soluble organic carbon , readily organic carbon and microbial biomass carbon were measured , and soil carbon pool management index was calculated .[Result]Compared to CK , soil organic carbon con-tents of N1, J2 and N2 treatments significantly increased in 2013, and the soil organic carbon contents of all fertilizing treatments significantly increased in 2014.Except for NPK treatment in 2013, the soil dis-solved organic carbon contents in 2013 and 2014 were significantly higher than that of CK .The dissolved organic carbon content of J 2 treatment was the highest , which was significantly higher than that of NPK in 2013.The readily organic carbon contents of N 1, J2 and N2 treatments were significantly higher than that of CK in 2013 and 2014 , and the highest value appeared in N 2 treatment .The microbial biomass carbon contents of all fertilizing treatments were significantly higher than that of CK , and the highest value ap-peared in N2 treatment.Compared with CK in the same year , the carbon pool management indexes of fer-tilizing treatments significantly increased , and the carbon pool management index of N 2 treatment was the highest .[Conclusion]The combined application of 40%NPK fertilizer and 60%cow dung is the optimal treatment for improving soil organic carbon fraction and carbon pool management index under maize /soy-bean intercropping condition in Karst area of northwest Guangxi .关键词
施肥/化肥有机肥配施/玉米/大豆套作/土壤有机碳/碳库管理指数Key words
fertilization/combined application of chemical fertilizer and organic manure/maize/soybean intercropping/soil organic carbon/carbon pool management index分类
农业科技引用本文复制引用
张亚杰,钱慧慧,刘坤平,苏以荣,李伏生..施肥对玉米／大豆套作土壤活性有机碳组分及碳库管理指数的影响[J].华南农业大学学报,2016,37(3):29-36,8.基金项目
国家科技支撑计划（2012BAD05B03）；国家自然科学基金（51469003）；中国科学院战略性先导科技专项子课题（XDA05070403）；863计划 （）
