摘要
为研究河套灌区灌期、非灌期地下水埋深与总氮关系,以内蒙古河套灌区乌拉特前旗北场试验区为研究区,区域内共布设了43眼地下水观测井,选取其中9眼典型井观测全年各月实测地下水埋深与总氮浓度,应用ARCGIS10.1软件反距离加权法进行空间插值,得到二者区域空间分布图,以得到其相关关系。结果表明：地下水埋深灌期在1-2m,非灌期在1.5-2.5m,秋浇期地下水埋深年内最小;地下水总氮浓度非灌期（2.5-5mg·L-1）明显大于灌期（0.5-2.5mg·L-1）;灌期地下水埋深与总氮浓度满足二项式关系（R2=0.543）,非灌期二者关系不明显。因此在现有条件下,应从源头上减少氮肥用量,优化施肥技术,以达到降低地下水氮污染的目的。
In order to study the relationship between groundwater depth and TN in Hetao irrigation area during the irrigation and non-irrigation period, taking the Qianqi north field as the study area, choose 9 typical in drills layout 43 groundwater observing drills have been to observe the groundwater depth for months and testing the groundwater TN, ARCGIS10.1 software IDW spatial interpolation, has been applied to get both regional spatial distribution and get their relationship. The results showed that the groundwater depth in irrigation period was ranging from 1-2m or so in irrigation period, while from 1.5-2.5m in non-irrigation period. It reached minimum in autumn water pouring of the year. The groundwater TN concentrations in irrigation（2.5-5mg·L-1）were significantly greater than that in irrigation period（0.5-2.5mg·L-1）. Irrigation period groundwater depth and TN concentrations met binomial relations（R2=0.543）, while the relationship in non-irrigation period is not obvious. Under the existing conditions.We need to reduce nitrogen fertilizer from the source, optimizing fertilization technology, to achieve the purpose of lowering groundwater nitrogen pollution.
出处
《沈阳农业大学学报》
CAS
CSCD
北大核心
2015年第4期463-470,共8页
Journal of Shenyang Agricultural University
基金
国家自然科学基金项目(51369019)
"十二五"国家科技支撑计划项目(2011BAD29B03)
关键词
地下水埋深
总氮浓度
农业面源污染
groundwater depth
TN concentration
non-point pollution
