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1. 山东农业大学资源与环境学院, 土肥高效利用国家工程研究中心,山东,泰安,271018
2. 德州市园林绿化服务中心,山东,德州,253000
Published:2024
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LI Chuanfu, XU Jialin, MING Yufei, et al. 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[J]. 2024, 38(2): 387-397.
LI Chuanfu, XU Jialin, MING Yufei, et al. 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[J]. 2024, 38(2): 387-397. DOI: 10.13870/j.cnki.stbcxb.2024.02.021.
[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 applicationof 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] 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 a theoretical basis and data support for expanding organic improvement methods in saline-alkali soil of the Yellow River Delta.
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