农业垦殖对东北黑土不同有机氮组分的影响  

Effects of Agricultural Cultivation on Different Organic Nitrogen Components in Black Soils of Northeast China

作　　者：刘鉴 姚钦 刘俊杰[2] 焦峰[1] 王光华 Liu Jian;Yao Qin;Liu Junjie;Jiao Feng;Wang Guanghua(College of Agronomy,Heilongjiang Bayi Agricultural University,Daqing 163319;Northeast Institute of Geography and Agroecology,Chinese Academy of Sciences;Key Laboratory of Low-carbon Green Agriculture in Northeastern China,Ministry of Agriculture and Rural Affairs P.R.China)

机构地区：[1]黑龙江八一农垦大学农学院,大庆163319 [2]中国科学院东北地理与农业生态研究所 [3]农业农村部东北平原农业绿色低碳重点实验室

出　　处：《黑龙江八一农垦大学学报》2024年第3期9-17,共9页journal of heilongjiang bayi agricultural university

基　　金：中国科学院战略性先导科技专项A子课题(XDA28020201);黑龙江八一农垦大学博士科研启动计划(XYB202005);黑龙江八一农垦大学大学生创新创业训练计划项目(202110223017)。

摘　　要：为明确农业垦殖对东北黑土区土壤有机氮的影响,研究按纬度由北向南采集黑土区土壤样品(农业耕作土和未扰动墓地自然土),采用Bremner酸解法测定土壤酸解总氮、酸解氨态氮、氨基酸态氮、氨基糖态氮和酸解未知氮等有机氮组分变化特征。研究发现,农业垦殖显著影响了黑土区土壤酸解总氮含量,变异幅度约为7.58%~30.43%,且耕作土酸解总氮含量与地理纬度和土壤有机质含量呈显著正相关关系。同时,与未扰动自然土相比,农业垦殖明显降低了酸解氨态氮含量4.20%以上,改变了各有机氮组分在酸解总氮中的比例,整体上垦殖耕作土中不同有机氮组分大小关系为酸解氨态氮>氨基糖态氮>氨基酸态氮>酸解未知氮。此外,垦殖后各有机氮组分随纬度呈现规律性变化特征,特别是含量较高的酸解氨基糖态氮和酸解未知态氮分别与地理纬度表现出显著的负相关和正相关关系。总的来说,农业垦殖显著影响了黑土酸解总氮含量,改变了有机氮不同组分在土壤中的分布格局。In order to clarify the influence of agricultural cultivation on soil organic nitrogen in black soil of Northeast China,soil samples(agricultural soil and undisturbed cemetery soil)were collected from north to south in black soil area,and the changes of total soil hydrolyzed nitrogen,hydrolyzed ammonium nitrogen,amino acid nitrogen,amino sugar nitrogen and unknown hydrolyzed nitrogen were determined by using Bremner method in this study.The results showed that agricultural cultivation significantly affected the content of the total soil hydrolyzed nitrogen in black soil area,with a variation range of 7.58%-30.43%.Moreover,the content of total soil hydrolyzed nitrogen was positively correlated with the geographical latitude and soil organic matter content significantly.Besides,compared with the undisturbed cemetery soil,agricultural cultivation significantly decreased the content of hydrolyzed ammonium nitrogen by more than 4.2%and changed the proportion of different organic nitrogen components in total soil hydrolyzed nitrogen.The content sequences of different organic nitrogen components in the cultivated soil were as follows:hydrolyzed ammonium nitrogen>amino sugar nitrogen>amino acid nitrogen>hydrolyzed unknown nitrogen.In addition,the organic nitrogen components were changed with latitude regularly in agricultural soil,especially the high content components of acid-hydrolyzed amino sugar nitrogen and hydrolyzed unknown nitrogen showed significant negative correlation and positive correlation with latitude,respectively.In general,agricultural cultivation significantly affected the content of total soil hydrolyzed nitrogen of black soil and changed distribution pattern of different organic nitrogen components.

关 键 词：东北黑土 土壤有机氮 垦殖 

分 类 号：S153.6[农业科学—土壤学]