基于NLEAP-GIS模型的南流江土壤硝态氮淋溶空间特征  

Spatial Characteristics of Soil Nitrate Leaching in Nanliu River Based on NLEAP-GIS Model

作　　者：韦丽珍 卢远 李卓亭 杨坤士 翁月梅 WEI Li-zhen;LU Yuan;LI Zhuo-ting;YANG Kun-shi;WENG Yue-mei(School of Geography and Planning,Ministry of Education,Nanning Normal University,Nanning 530001,China;Key Laboratory of Beibu Gulf Environmental Change and Resource Utilization,Ministry of Education,Nanning Normal University,Nanning 530001,China)

机构地区：[1]南宁师范大学地理科学与规划学院,广西南宁530001 [2]南宁师范大学北部湾环境演变与资源利用教育部重点实验室,广西南宁530001

出　　处：《南宁师范大学学报（自然科学版）》2022年第4期121-127,共7页Journal of Nanning Normal University：Natural Science Edition

基　　金：国家自然科学基金(41661043);广西自然科学基金(2015GXNSFAA139234);广西科技重点研发计划(AB16380318);广西研究生教育创新计划项目(YCSW2021287);广西壮族自治区八桂学者工程专项经费。

摘　　要：氮肥在农作物的生长过程中起着至关重要的作用,合理氮肥施用有利于作物的生长,但氮肥施放不当不仅会导致氮肥的利用率低,还会造成土壤环境污染,甚至造成土壤硝酸盐淋溶导致地下水污染。由于南流江流域农作物硝酸盐淋溶方面的研究较少,本研究在此基础上使用NLEAP-GIS模型,与土壤剖面属性、气象数据、土壤剖面数据相结合,探讨不同施氮量与不同降水量条件下南流江流域土壤硝酸盐淋溶情况。研究结果证实了硝酸盐淋溶的来源是氮肥在降水与灌溉条件下溶解而成;且淋溶多集中在降水量大且降水较集中的季节,即降水与硝酸盐的淋溶呈正相关关系。该结果可应用于耕地氮磷污染的管控之中,为氮肥的施放造成的地下水硝酸盐污染分布评价提供理论依据。Nitrogen fertilizer plays a vital role in the growth of crops, and rational nitrogen fertilizer is useful for the growth of crops, but improper nitrogen fertilizer will not only lead to low utilization rates of nitrogen fertilizer, but also cause soil environmental pollution, and even cause soil nitrate. Its solubility caused ground water pollution.Since study on the nitrate leaching of crops in the South River Basin is less, this study uses NLEAP-GIS model, combined with soil profile properties, meteorological data, soil profile data, to explore soil nitrate in the Southern River Basinunder the conditions of different nitrogen application and different precipitation.The results of the study confirmed that the source of nitrate leaching was causedwhen dissolved in precipitation and irrigation conditions;and the leaching was concentrated in the season of precipitation.This result can be applied to the control of the pollution of nitrogen and phosphorus pollution, providing theoretical basis for the assessment of the distribution of underground water nitrate pollution caused by nitrogen fertilizer.

关 键 词：NLEAP-GIS模型 氮淋溶 土壤污染 

分 类 号：X592[环境科学与工程—环境工程]