3种Maillard反应前体物质对稻草木质素腐解及腐殖质组成的影响  

Effects of Three Maillard Reaction Precursors on the Decomposition of Rice Straw and Its Humus Composition

作　　者：白成鑫 高嘉聪 曾檬 赵泓博 赵鑫 王帅 王楠 BAI Chengxin;GAO Jiacong;ZENG Meng;ZHAO Hongbo;ZHAO Xin;WANG Shuai;WANG Nan(College of Agriculture,Jilin Agricultural Science and Technology University,Jilin,Jilin 132101,China;College of Agriculture,Jilin Agricultural University,Changchun 130118,China)

机构地区：[1]吉林农业科技学院农学院,吉林吉林132101 [2]吉林农业大学农学院,长春130118

出　　处：《中国稻米》2023年第6期39-43,共5页China Rice

基　　金：吉林农业科技学院青年基金项目(吉农院合字第[20200003]号);吉林省重点研发计划项目(20210202118NC);吉林市科技创新发展计划项目(20210103074)。

摘　　要：Maillard反应前体物质在稻草腐解过程对腐殖质形成能起到激发效应,利用该特性,从腐殖质组成角度评价外源添加Maillard反应前体物质对稻草腐解进程起到的促进作用。本研究采用室内培养法,以稻草为基础材料,通过邻苯二酚(Cat)、葡萄糖(Glu)和甘氨酸(Gly)3种Maillard反应前体物质的外源添加,以不添加任何前体物质处理为对照,结合稻草腐解进程中腐殖质组成的变化,揭示各前体物质对稻草腐解进程的差异影响。结果表明,随着培养时间延长,Cat、Glu、Gly处理和CK的总有机碳(TOC)含量均呈降低趋势,添加3种Maillard反应前体物质对TOC矿化作用均有所促进,其中,Glu的作用最为显著,使TOC含量下降22.9%;历经培养,各处理均有利于可提取腐殖酸碳(C_(HE))含量的增加并促进可提取腐殖酸(HE)分子结构复杂化,Cat的添加使C_(HE)获得最大幅度提高(475.4%),其次为Glu,Gly的添加使HE分子复杂程度达到最高;添加3种Maillard反应前体物质能够使胡敏酸碳(C_(HA))含量获得提高且改善腐殖质品质,其中,Glu在提高C_(HA)含量及改善腐殖质品质方面更为有利。综上,Glu在促进稻草矿化分解,提升稻草腐解进程C_(HA)含量、改善腐殖质品质方面更有优势,Cat更有利于C_(HE)含量的提升,而Gly则更易促进HE分子结构的复杂化。The promotion effect of exogenous addition of Maillard precursors on rice straw decomposition process was evaluated from the perspective of humus composition in view of the stimulating effect of Maillard reaction precursors on the humus formation during rice straw decomposition.In this study,the indoor culture method was adopted,rice straw serving as the basic material based on the exogenous addition of three Maillard precursors(Catechol,Cat;Glucose,Glu;Glycine,Gly).The change of humus composition revealed the different effects of each precursor on the decomposition process of rice straw.The results showed that,the total organic C(TOC)content of Cat,Glu,Gly treatment and CK showed a decreasing trend with the extension of cultivation time,and the addition of three Maillard reaction precursors all promoted the mineralization of TOC,among which the effect of glucose was the most,making the TOC content decreased by 22.9%.After the culture,each treatment was beneficial to the increase of C content of humic-extracted acid(C_(HE))and the complication of humic-extracted acid(HE)molecular structure.The addition of catechol could increase C_(HE)the most(475.4%),followed by the glucose,and glycine made the molecular complexity of HE the highest.The addition of three kinds of Maillard reaction precursors could increase the C content of humic-acid(C_(HA))and improve the humus quality.In contrast,among the Maillard reaction precursors,the glucose was more favorable in increasing the C_(HA)content and improving the humus quality.To sum up,the glucose had more advantages in promoting the mineralization and decomposition of rice straw,improving the C_(HA)content in the decomposition process of rice straw and improving the humus quality.The catechol was more conducive to the improvement of C_(HE)content,while the glycine was more likely to promote the complication of HE molecular structure.

关 键 词：MAILLARD反应 前体物质 水稻 稻草 腐解 腐殖质组成 

分 类 号：S153.1[农业科学—土壤学]