雄安新区不同农用地类型土壤水氮时空变化  

Temporal and spatial changes of soil water and nitrogen in different agricultural lands in Xiong’an New Area

作　　者：陈瑜 韩丽茹 郭文颢[3] 涂智勇 夏辉[1] CHEN Yu;HAN Liru;GUO Wenhao;TU Zhiyong;XIA Hui(College of Urban and Rural Construction,Hebei Agricultural University,Baoding 071000,China;Mengcun Hui Autonomous County Water Bureau,Cangzhou 061400,China;The Bureau of Hydrology and Water Resources Survey of Baoding,Hebei Province,Baoding 071000,China)

机构地区：[1]河北农业大学城乡建设学院,河北保定071001 [2]河北省沧州市孟村回族自治县水务局,河北沧州061400 [3]河北省保定水文水资源勘测局,河北保定071001

出　　处：《河北农业大学学报》2024年第1期99-105,共7页Journal of Hebei Agricultural University

基　　金：河北省教育厅高等学校科学技术研究项目(ZD2020347)。

摘　　要：本文探究土壤水氮的时空变化规律,为控制雄安新区地下水污染提供理论依据,对建设“蓝绿雄安”具有重要意义。在雄安新区以耕地、林地和菜地3种农用地为研究对象,测定土壤含水率、硝态氮、铵态氮以及容重等土壤指标,分析不同农用地的土壤含水率、硝态氮和铵态氮时空变化规律及其影响因素。结果表明:在土层垂向上,土壤含水率随土层深度先增加后减小最后趋于稳定。耕地和菜地土壤硝态氮含量随土层深度的增加呈现先增加后减小的趋势。耕地、林地和菜地土壤铵态氮含量均随着土层深度增加逐渐减小。在时间上,耕地含水率波动较大,林地受季节影响变化较小。菜地含水率随时间变化比较平稳,10月后明显下降。林地和菜地土壤硝态氮含量随时间先增加后减小,耕地则随时间呈正弦波动。菜地土壤铵态氮含量随时间逐渐降低,林地土壤铵态氮含量变化小且含量最小。3种农用地土壤含水率均与土壤容重呈负相关,与降水量和灌溉呈显著正相关(P<0.05)。耕地土壤容重与土层深度极显著相关(P<0.01)。耕地和菜地土壤硝态氮和铵态氮均与土层深度、降水量以及灌溉量呈显著负相关。3种农用地土壤硝态氮与铵态氮均呈显著正相关。耕地和菜地的水氮含量分布对地下水污染影响更大,因此合理灌溉施用氮肥,改善土壤性质,有助于保护雄安新区地下水环境。This paper explored the temporal and spatial variation law of soil water and nitrogen to provide a theoretical basis for controlling groundwater pollution in Xiong'an new area,which is of great significance to the construction of"blue-green Xiong'an".We selected cultivated land,forest land and vegetable land in Xiong'an New area as the research object whose soil indexes such as soil moisture content,nitrate nitrogen,ammonium nitrogen and bulk density were measured.Then we analyzed the temporal and spatial variation laws and influencing factors of soil moisture content,nitrate nitrogen and ammonium nitrogen of different agricultural lands.The results showed that the soil moisture content first increased and then decreased with the depth of the soil layer and finally tend to be stable in the vertical direction of the soil layer.The content of nitrate nitrogen in cultivated land and vegetable soil increased first and then decreased with the increase of soil depth. The content of ammonium nitrogen in cultivatedland, forest land and vegetable soil decreased gradually with the increase of soil depth. In terms of time, the watercontent of cultivated land fluctuated greatly, and the change of forest land was less affected by seasons. The watercontent of vegetable field changed steadily with time, and decreased significantly after October. The content of nitratenitrogen in forest land and vegetable soil first increased and then decreased with time, while the content of cultivatedland fluctuated sinusoidally with time. The content of ammonium nitrogen in vegetable soil decreased gradually withtime, and the content of ammonium nitrogen in forest soil changed little and the content was the smallest. The soilmoisture content of the three agricultural lands was negatively correlated with soil bulk density and significantlypositively correlated with precipitation and irrigation (P < 0.05). The soil bulk density of cultivated land wassignificantly correlated with the depth of soil layer (P < 0.01). Nitrate nitrogen and ammonium

关 键 词：雄安新区 农用地类型 土壤含水率 硝态氮 铵态氮 

分 类 号：S151.9[农业科学—土壤学] TV93[农业科学—农业基础科学]