小麦和水稻种植条件下非根际和根际土壤中氨基糖积累特征  

Accumulation of Amino Sugars in Bulk and Rhizosphere Soils under Wheat and Rice Cropping

作　　者：胡航宇 邓扬悟[1] 魏亮 祝贞科 赵搏 葛体达 HU Hangyu;DENG Yangwu;WEI Liang;ZHU Zhenke;ZHAO Bo;GE Tida(College of Resource and Environmental Engineering,Jiangxi University of Science and Technology,Ganzhou,Jiangxi 341000;State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products,Institute of Plant Virology,Ningbo University,Ningbo,Zhejiang 315211;College of Land and Environment,Shenyang Agricultural University,Shenyang,Liaoning 110866)

机构地区：[1]江西理工大学资源与环境工程学院,江西赣州341000 [2]宁波大学植物病毒学研究所,省部共建农产品质量安全危害因子与风险防控国家重点实验室,浙江宁波315211 [3]沈阳农业大学土地与环境学院,辽宁沈阳110866

出　　处：《核农学报》2025年第3期633-640,共8页Journal of Nuclear Agricultural Sciences

基　　金：国家自然科学基金(42267050);中国博士后科学基金面上资助(2022M721728)。

摘　　要：为明确不同种植条件下氨基糖在非根际和根际土壤中的积累机制,本研究以水稻土为研究对象,设置两种种植条件以降低其他因素的干扰,一份保持湿润种植小麦,一份淹水种植水稻,分析不同种植条件下非根际和根际土壤中微生物残体对有机碳的贡献。结果表明,种植小麦的根际与非根际土壤有机碳含量无显著差异,而种植水稻的根际土壤有机碳含量较非根际土壤增加7.0%。与种植小麦的土壤相比,种植水稻的土壤中氨基半乳糖含量显著减少,非根际土壤中氨基甘露糖含量显著增加,根际土壤中氨基葡萄糖含量减少。不淹水种植小麦时,氨基糖单体对土壤有机碳的相对贡献率仅为69.2%,而相同土壤条件下,淹水种植水稻时,该相对贡献率高达80.7%。不种植物的土壤间相比,淹水对土壤中真菌的抑制作用强于细菌,土壤胞壁酸对有机碳变异的相对贡献率高于真菌氨基葡萄糖。水稻种植土壤中的氨基糖态碳总量显著(P<0.05)低于小麦种植土壤,但水稻种植可显著(P<0.05)提高氨基糖态碳对有机碳的贡献。本研究结果可为揭示稻田与旱地土壤有机碳积累差异的形成机理提供新的研究思路。To clarify the mechanism of amino sugar accumulation in rhizosphere and bulk soils under different cropping conditions,this study was conducted on paddy soil,with two distinct planting scenarios established to minimize the influence of other variables:One portion was kept moist for wheat cultivation and the other portion was flooded for rice cultivation,so as to analysis the contribution of microbial residues to organic carbon in bulk and rhizosphere soils under rice and wheat cropping.The results showed that there was no significant difference in the content of organic carbon between bulk and rhizosphere soils under wheat cultivation,except that the content of organic carbon in rhizosphere soil under rice cultivation was increased by 7.0%,compared with that in bulk soil.Compared with wheat soil,the content of galactosamine in rice soil was significantly decreased,the content of mannosamine was significantly increased in bulk soil,while the content of glucosamine in rhizosphere soil was decreased.When planting wheat without flooding,the relative contribution rate of amino sugar to soil organic carbon was only 69.2%,while this accounted for 80.7%of soil organic carbon variation when rice was planted in the same soil with flooding.A comparison with unplanted soil revealed that flooding had a stronger inhibitory effect on fungi than that on bacteria,and soil cytosolic acid occupied a higher relative contribution rate to the amount of organic carbon variation than fungal glucosamine.The total amount of amino sugars carbon in paddy soil was significantly(P<0.05)lower than that in wheat soil,but rice cultivation significantly(P<0.05)increased the contribution of amino sugars carbon to organic carbon.The findings of this study provide new insights for revealing the formation mechanism of soil organic carbon accumulation difference between paddy and upland soils.

关 键 词：氨基糖 淹水土壤 土壤养分 水稻 小麦 

分 类 号：S512.1[农业科学—作物学] S511