摘要
[目的]为探讨菇渣有机肥与脱硫石膏对盐碱土有机碳组分及碳库管理指数的影响。[方法]以黄河三角洲新垦殖小麦-玉米轮作地为研究对象,采用随机区组试验方法,设置不施肥(CK)、农民常用施肥(CN)、菇渣有机肥(MCOF)、菇渣有机肥+脱硫石膏(MCOG)4个处理,通过3年田间施肥处理。[结果]菇渣有机肥与脱硫石膏配施显著降低0-20 cm土壤盐碱度,提高土壤氮磷钾养分含量和阳离子交换量(p<0.05);各处理0-20 cm土层总有机碳(TOC)、易氧化有机碳(EOC)、微生物量碳(MBC)含量高于20-40 cm土层,而水溶性有机碳(WSOC)含量则相反;与CN处理相比,MCOG处理0-20 cm土层TOC、EOC、WSOC、MBC分别显著提高15.48%,23.50%,18.98%,51.40%,EOC和MBC有效率分别提高13.94%,30.49%,且MCOG处理较CN和CK处理的土壤碳库管理指数(CPMI)显著提高15.38%和20.00%;MBC的敏感性指数均高于其他有机碳组分,MCOG处理MBC值最高。相关性分析表明,土壤TOC含量取决于其活性组分,而影响盐碱土有机碳活性组分含量及其有效率、碳库管理指数的主要因素为pH、CEC和EC。[结论]菇渣有机肥与脱硫石膏配施能显著降低土壤盐碱含量,提高土壤肥力并增强固碳效率,研究结果为拓展盐碱地土壤有机改良方法提供理论依据和数据支撑。
[Objective]In order to investigate the effects of mushroom residue organic fertilizer and desulfurized gypsum on organic carbon components and carbon pool management index(CPMI)of saline-alkali soil.[Methods]The newly reclaimed wheat-maize rotation land in the Yellow River Delta was used as the research subject,and the randomized block experiment method was conducted to set up four treatments:no fertilization(CK),conventional farming fertilization(CN),mushroom residue organic fertilizer(MCOF),mushroom residue organic fertilizer and desulfurized gypsum(MCOG),which were treated by field fertilization for 3 years.[Results]The combined application of mushroom residue organic fertilizer and desulfurized gypsum significantly reduced the salinity of 0-20 cm soil layer,and increased the soil nitrogen,phosphorus and potassium nutrition content and cation exchange capacity(p<0.05).The contents of total organic carbon(TOC),easily oxidized organic carbon(EOC)and microbial biomass carbon(MBC)in 0-20 cm soil layer were higher than those in 20-40 cm soil layer,while the water-soluble organic carbon(WSOC)was lower than that in 20-40 cm soil layer.In the 0-20 cm soil layer,compared with the CN treatment,the MCOG treatment significantly increased soil TOC,EOC,WSOC,and MBC by 15.48%,23.50%,18.98%,and 51.40%,respectively.The effective rates of EOC and MBC increased by 13.94%and 30.49%,respectively.There was no significant effect on the effective rate of WSOC.The combined application of organic fertilizer and desulfurized gypsum significantly increased the soil CPMI,which increased by 15.38%and 20.00%compared with the CN and the CK treatments,respectively.The sensitivity index of MBC was higher than that of other organic carbon components,and the MBC value of MCOG treatment was the highest.Correlation analysis showed that soil TOC content depended on its active components,while the main factors affecting the content and effective efficiency of organic carbon active components,as well as the CPMI,are pH,CEC,and EC.[Conclusion]Therefor
作者
李传福
徐家林
明玉飞
高舒
吕欣
杨宇轩
李永强
焦树英
LI Chuanfu;XU Jialin;MING Yufei;GAO Shu;L Xin;YANG Yuxuan;LI Yongqiang;JIAO Shuying(College of Resources and Environment,Shandong Agricultural University,National Engineering Research Center for Efficient Utilization of Soil and Fertilizer Resources,Tai’an,Shandong 271018,China;Dezhou Landscaping Service Center,Dezhou,Shandong 253000,China)
出处
《水土保持学报》
CSCD
北大核心
2024年第2期387-397,共11页
Journal of Soil and Water Conservation
基金
山东省自然科学基金面上项目(ZR2020MC173)
国家重点研发计划项目(2017YFD0800602,2018YFD0800403)。
关键词
盐碱地
菇渣有机肥
脱硫石膏
活性有机碳
碳库管理指数
saline-alkali land
mushroom residue organic fertilizer
desulfurization gypsum
activated organic carbon
carbon pool management index
