引用本文:宋祥云,岳 鑫,孔祥平,柳新伟,刘 蕾,李 妍,赵婷婷,曾路生,郭晓冬,李旭霖,刘庆花,金圣爱,崔德杰.有机物料对盐土腐殖物质组成和结构特征的影响[J].土壤学报,2020,57(2):414-424. DOI:10.11766/trxb201904200187
SONG Xiangyun,YUE Xin,KONG Xiangping,LIU Xinwei,LIU Lei,LI Yan,ZHAO Tingting,ZENG Lusheng,GUO Xiaodong,LI Xulin,LIU Qinghua,JIN Shengai,CUI Dejie.Effects of Application of Organic Material on Composition and Structural Characteristics of Humic Substances in Saline Soil[J].Acta Pedologica Sinica,2020,57(2):414-424. DOI:10.11766/trxb201904200187
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有机物料对盐土腐殖物质组成和结构特征的影响
宋祥云,岳 鑫,孔祥平,柳新伟,刘 蕾,李 妍,赵婷婷,曾路生,郭晓冬,李旭霖,刘庆花,金圣爱,崔德杰
1.青岛农业大学资源与环境学院;2.青岛农业大学化学与药学院;3.青岛市崂山区农业农村局
摘要:
通过室内培养试验研究了秸秆、秸秆堆肥、秸秆生物质炭对黄河三角洲地区盐土腐殖物质组成和结构特征的影响。结果表明,秸秆、秸秆堆肥和秸秆生物质炭主要增加了胡敏素含量,由对照的5.48 g·kg-1分别增加至11.20 g·kg-1、16.66 g·kg-1和20.60 g·kg-1。秸秆堆肥和生物质炭配施胡敏酸含量增加至1.36 g·kg-1,秸秆处理的富里酸由培养30 d时的3.77 g·kg-1下降至3.32 g·kg-1。土壤胡敏素含量与土壤有机碳含量在培养30 d(R2 = 0.84, P< 0.001, n= 10)和180 d(R2 = 0.98, P< 0.001,n= 10)时均呈显著正相关关系。秸秆、秸秆堆肥、生物质炭均有利于富里酸脂族碳相对含量的增加。生物质炭有利于土壤胡敏酸芳香类物质的增加;而秸秆或秸秆堆肥进入土壤初期,尤其是秸秆堆肥更有利于胡敏酸中脂族和碳水化合物或多糖类物质的积累。总之,生物质炭主要增加了胡敏素含量,秸秆堆肥与生物质炭配施更有利于增加胡敏酸含量。秸秆在进入土壤初期增加了富里酸含量。生物质炭与秸秆或秸秆堆肥配施时,生物质炭所占比例对胡敏素含量、胡敏酸芳香类物质含量和富里酸脂族碳含量影响较大。
关键词:  黄河三角洲  盐土  有机物料  腐殖物质  红外光谱
基金项目:国家自然科学基金项目(41501246)、山东省现代农业产业技术体系棉花岗位创新团队项目(SDAIT-03-06)和国家重点研发计划项目(2018YFD0800303)资助
Effects of Application of Organic Material on Composition and Structural Characteristics of Humic Substances in Saline Soil
SONG Xiangyun1, YUE Xin1, KONG Xiangping2, LIU Xinwei1, LIU Lei3, LI Yan4, ZHAO Tingting4, GUO Xiaodong1, ZENG Lusheng1, LI Xulin1, LIU Qinghua1, JIN Shengai1, CUI Dejie1
1.College of Resources and Environment,Qingdao Agricultural University;2.College of Chemistry and Pharmaceutical Science, Qingdao Agricultural University;3.Bureau of Agriculture and Countryside, Laoshan District, Qingdao;4.College of Resources and Environmnet,Qingdao Agricultural Uniersity
Abstract:
【Objective】Returning straw into soil and applying composted straw and biochar derived from straw are effective ways of increasing soil organic carbon (SOC). 【Method】Samples of saline soil were collected from the Yellow River Delta and incubated for 30 and 180 days in lab in order to study effects of application of straw, compost and biochar on composition and structural characteristics of humic substances in the soil. 【Results】Results show that the practices increased humin (Hu) more than humic acid (HA) and fulvic acid (FA). The content of Hu increased from 5.48 g·kg-1 increased to 11.20 g·kg-1、16.66 g·kg-1 and 20.60 g·kg-1, after 180 days of incubation. In addition, the content of HA increased to 1.36 g·kg-1 in the plot applied with compost plus biochar, while in the plot of straw returning, the content of FA decreased from 3.77 g·kg-1 to 3.32 g·kg-1, after 30 days of incubation. Positive correlations were observed between the contents of Hu and SOC in the plots incubated for either 30 (R2 = 0.84, P< 0.001, n = 10) or 180 (R2 = 0.98, P< 0.001, n= 10) days. Organic carbon (OC) increased mainly in Hu, especially in the plot applied with biochar. Both application of compost or returning of straw were conducive to increasing HA and FA, and application of compost plus biochar was more significant in the effect of increasing HA. The content of Hu was mainly affected by the ratio of biochar in the plots applied with biochar plus straw. Application of straw, compost or biochar was in favour of accumulation of aliphaic groups of FA, and good to accumulation of aliphaic groups and carbohydrate in HA at the initial stage in the plots applied with straw or compost, especially with compost. Application of biochar was good to increasing aromatic groups in HA, while application of straw or compost, especially the latter, was to increasing aliphatic groups and polysaccharide at the initial stage of incubation. But afterwards, aliphatic groups deceased, while polysacharide went on increasing with the incubation lasting, regardless of treatment. 【Conclusion】In summary, biochar mainly increases the content of Hu, while compost plus biochar is in favor of increasing HA. However, straw increases the content of FA at the initial incubation stage. The ratio of biochar in the plots of applied with biochar plus straw or compost affects the content of Hu, aromatic functional groups of HA and aliphatic groups of FA.
Key words:  Yellow River Delta  Salt-affected soil  Organic materials  Humic substances  Fourier Transform infrared spectroscopy (FTIR) spectra