文章摘要
秦显艳, 王春霞, 何新林.施氮对盐碱土入渗及水盐运移的影响[J].水土保持学报,2019,33(1):248~252
施氮对盐碱土入渗及水盐运移的影响
Effect of Nitrogen Application on Infiltration and Water and Salt Transport in Saline Alkali Soil
投稿时间:2018-08-12  
DOI:10.13870/j.cnki.stbcxb.2019.01.039
中文关键词: 施氮  盐碱土  入渗特征  水盐运移  脱盐效率
英文关键词: nitrogen application  saline alkali soil  infiltration characteristics  water and salt transport  desalination efficiency
基金项目:国家重点研发计划项目(2017YFC0404304);石河子大学高层次人才科研启动资金项目(RCZX201129)
作者单位E-mail
秦显艳, 王春霞, 何新林 石河子大学水利建筑工程学院, 新疆 石河子 832000 hexinlin2002@163.com 
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中文摘要:
      为研究施氮对盐碱土入渗及水盐运移的影响,选用含盐量为0.3%,0.9%,1.2%盐碱土与4种不同氮肥浓度(0,300,600,900 mg/L)组合,进行室内一维垂直土柱积水入渗试验。结果表明:(1)施氮对盐碱土入渗具有减渗作用,同一施氮水平下,盐碱土的入渗性能随含盐量的升高而降低,脱盐深度也降低。(2)随着入渗时间的增加,下层根区土层的含水量均为不施氮时最大,此时土层保水性最好。(3)0.3%盐碱土上施氮较不施氮脱盐量大,施加氮肥对盐碱土脱盐有促进作用;而在0.9%和1.2%盐碱土上均为不施氮时脱盐量大,即施氮对盐碱土脱盐具有拮抗作用。研究结果为盐碱地土壤合理施氮提供了有效的机理性基础,为盐渍化地区的作物生长以及生态保护提供参考。
英文摘要:
      In order to study the effect of nitrogen application on the infiltration and water and salt transport in salt and alkali soil, the saline soil with salt content of 0.3%, 0.9% and 1.2% and four different nitrogen concentrations (0, 300, 600, 900 mg/L) were combined as the treatments, and one dimensional vertical soil column infiltration experiment were carried out. The results showed that:(1) Nitrogen application reduced the infiltration of saline alkali soil. Under the same nitrogen application level, the infiltration capacity of saline alkali soil decreased with the increasing of salt content, and the desalting depth also decreased. (2) With the increase of infiltration time, the soil moisture of the lower root zone was the maximum when no nitrogen was applied, and the water retention of soil was the best at this time. (3) In the saline soil with salt content of 0.3%, the amount of desalination in the soil with nitrogen application was larger than that without nitrogen application, and the nitrogen application promoted the desalination of saline alkali soil; however in saline alkali soil with salt content of 0.9% and 1.2%, the amount of desalination was higher when there was no nitrogen application, which mean that nitrogen application had an antagonistic effect on the desalination of saline alkali soil. The research results provided an effective mechanism foundation for rational nitrogen application in saline alkali soil, and provided reference for crop growth and ecological protection in salinized area.
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