Movement Regularity and Its Influence Factors of Soil Salt and Moisture During Farming Period

ZHANG Nan; HAN Jinxu; JIANG Hong; SU Xiaohui; ZHANG Bo; DU Kai

doi:10.13961/j.cnki.stbctb.2015.06.002

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Movement Regularity and Its Influence Factors of Soil Salt and Moisture During Farming Period

- Movement Regularity and Its Influence Factors of Soil Salt and Moisture During Farming Period
- Bulletin of Soiland Water Conservation Vol. 35, Issue 6, Pages: 8-14(2015)
- 作者机构：
  
  1. 黄河水利科学研究院,河南,郑州,450003
  2. 黄河流域水资源保护局,河南,郑州,450004
- 作者简介：
- 基金信息：
- DOI：10.13961/j.cnki.stbctb.2015.06.002
  CLC：
- Published：2015
- 稿件说明：
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ZHANG Nan, HAN Jinxu, JIANG Hong, et al. Movement Regularity and Its Influence Factors of Soil Salt and Moisture During Farming Period[J]. Bulletin of Soiland Water Conservation, 2015, 35(6): 8-14.
DOI：

ZHANG Nan, HAN Jinxu, JIANG Hong, et al. Movement Regularity and Its Influence Factors of Soil Salt and Moisture During Farming Period[J]. Bulletin of Soiland Water Conservation, 2015, 35(6): 8-14. DOI： 10.13961/j.cnki.stbctb.2015.06.002.

摘要

[目的] 分析灌溉期内土壤水盐运动规律

为改进灌区耕作期灌溉制度存在的现行问题、土壤盐碱化治理以及节水型灌溉工程的实施对生态环境的影响提供科学指导。[方法] 综合考虑土壤质地、灌溉方式、作物种植等因素进行试验点、观测点的布设

基于2 a耕作期监测数据分析

通过常规方法对土壤脱盐积盐运移(表聚型、底聚型、均衡型及震荡型)、耕作期内不同耕种观测区内土壤盐分变化等方面进行计算分析

并对影响因子(地下水埋深、初始含盐量、降雨)进行相关性分析。[结果] 灌溉初期土壤表层含盐量变化较早

灌后10 d土壤含盐量开始回升

各观测区土壤含盐量随时间逐渐减小。[结论] 荒地内不同土层观测期内呈积盐状态;不灌或少灌区域土壤表聚趋势加强;地下水埋深较深的井灌区

脱盐速率快于潜水位较高的渠灌区;初始含盐量越高

土壤脱盐量绝对值越大

相对脱盐率与初始含盐量并无明显关系。

Abstract

[Objective] The change regularity of soil water and salt in the farming period was analyzed to improve the present irrigation method in order to provide scientific guidance for salinization control

and to test the impacts of water-saving irrigation on ecological environment.[Methods] Observation sites and test points were selected according to indices of soil texture

irrigation method

crop cultivation and other factors. After two years of observation and test

changes of soil salinity in profiles were calculated and analyzed

and the regularity patterns of desalination and salinization were identified(normal

inverted

even and concussion type). The correlations among the impacting factors of movement regularity as ground water level

preliminary salinity and rainfall were analyzed.[Results] Trend of normal accumulation strengthened in unirrigation or less irrigation area. Surface soil salinity changed as early as in the preliminary stage of irrigation

for example

10 days after irrigation

soil salinity was observed beginning to rise. Soil salinity had greater than that before irrigation activities(or before rain). Soil in survey area(except of wasteland) were observed in desalination state during cultivation period

and the soil salinity decreased regularly with time.[Conclusion] Soil in wasteland was observed in a normal salinity state

and enhanced surface accumulation of salinity was observed at sections with no or less irrigation. Rates of desalination in districts where were irrigated using well with low ground water level were faster than those in canal irrigation areas with high groundwater level.

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