摘要
土壤中盐分的变化会对农作物的生长产生影响,拟通过田间试验的方法,以衡水地区为例,研究该地区微咸水灌溉对土壤水盐分布的影响。结果表明:利用该地区地下微咸水对灌区玉米进行灌溉时,受气象因素影响,表层土壤含水率随时间变化较小,随土壤埋深的增加逐渐增大;含水率变化频率随埋深的增加逐渐减小;土壤表层含盐量最高,呈现明显的表层富集现象;在降水及灌溉水的作用下,土壤含盐量下降明显,由初始值2.39 g/kg降至1.40 g/kg;考虑地下水作用,土壤在160 cm处出现盐分富集现象;当土壤水分通量增大时,土壤接受降水补给,洗盐效果明显。
The change of salinity in soil will affect the growth of crops.In this paper,the effect of brackish water irrigation on soil water and salt distribution in Hengshui area was studied by field experiment.The results show that when maize was irrigated with the underground brackish water in this area,the surface soil moisture content changed little with time and increased gradually with the increase of soil depth under the influence of meteorological factors.The change frequency of soil moisture content decreased with the increase of soil depth.The surface layer of soil had the highest salt content,and presented obvious surface enrichment.Under the effect of precipitation and irrigation water,the soil salinity decreased significantly from the initial value of 2.39 g/kg to 1.40 g/kg.With the effect of groundwater,salt enrichment occurred at 160 cm.When the soil water flux increased,the soil was replenished by precipitation,and the effect of salt washing was obvious.
作者
马雅静
王哲
李志萍
李琪
侯伟男
MA Yajing;WANG Zhe;LI Zhiping;LI Qi;HOU Weinan(North China University of Water Resources and Electric Power,Zhengzhou 450046,China;Institute of Hydrogeology and Environmental Geology,Chinese Academy of Geological Sciences,Shijiazhuang 050061,China)
出处
《华北水利水电大学学报(自然科学版)》
2019年第4期65-69,共5页
Journal of North China University of Water Resources and Electric Power:Natural Science Edition
基金
国家自然科学基金项目(41372260)
国家重点研发计划项目(2017YFC0403500)
关键词
微咸水灌溉
水分分布
盐分分布
田间试验
水分通量法
brackish water irrigation
moisture distribution
salt distribution
field experiment
method of soil water flux