菇渣有机肥配施脱硫石膏对黄河三角洲盐碱土活性有机碳及其敏感性的影响
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1.山东农业大学;2.德州市园林绿化服务中心

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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)


Effects of Mushroom Residue Organic Fertilizer Combined with Desulfurized Gypsum on Active Organic Carbon and Its Sensitivity in Saline-Alkali Soil of the Yellow River Delta
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Shandong Agricultural University

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    摘要:

    摘要:[目的]黄河三角洲土壤盐碱化问题严重制约当地土壤资源高效利用和农业可持续发展,施用改良剂是盐碱土质量改善的有效措施。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)共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以及阳离子交换量(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,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有效率和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。

    Abstract:

    Abstract: [Objective]The soil salinization in the Yellow River Delta seriously restricts the efficient utilization of soil resources and sustainable development of agriculture. The application of amendments is an effective measure to improve saline-alkali soil in coastal areas. [Methods]In order to explore the effects of mushroom residue organic fertilizer and desulfurized gypsum on the organic carbon components and carbon pool management index (CPMI) of saline-alkali soil, the wheat-maize rotation land in the newly reclaimed of Yellow River Delta was used as the research object, and the randomized block experiment method was conducted to set up four treatments: no fertilization (CK), farmers' common fertilization (CN), mushroom residue organic fertilizer (MCOF), mushroom residue organic fertilizer and desulfurized gypsum (MCOG). Through three years of field experiments, [Results] the results showed that the combined application of mushroom residue organic fertilizer and desulfurized gypsum significantly reduced soil pH, electrical conductivity and alkalinity in 0~20 cm soil layer, and increased soil 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 CN treatment, 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 were 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 CN and 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]Therefore, the combined application of mushroom residue organic fertilizer and desulfurized gypsum can significantly decrease soil alkalinity, improve soil fertility and enhance carbon sequestration efficiency of saline-alkali soil, this research provides theoretical basis and data support for expanding organic improvement methods in saline-alkali soil of the Yellow River Delta.

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  • 收稿日期:2023-09-01
  • 最后修改日期:2023-10-07
  • 录用日期:2023-10-09
  • 在线发布日期: 2024-01-27
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