内蒙古河套灌区土壤水盐空间变异性研究
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摘要
绿洲是干旱区特有的生态景观之一,也是干旱区人类生产和生活的主要空间。在干早区,水是绿洲形成和发展的基础条件,是绿洲农业生产的血液。绿洲农业必须依赖灌溉,但灌溉不合理可造成水资源浪费、短缺及土壤盐渍化等问题,土壤盐渍化是土地退化的主要问题,并威胁着绿洲农业的可持续发展最终导致绿洲生态环境的恶化。因此,对绿洲土壤水盐含量空间变异性进行研究,可为干旱区的可持续发展提供一定的科学指导意义。
内蒙古河套灌区位于中国西北内陆,气候干旱,降水稀少,土壤母质含盐,地下水位较高,在灌区发展的过程中,产生了较为严重的土壤次生盐渍化问题,是我国土壤盐渍化发育的典型地区,农业生产主要依靠灌溉,没有灌溉就没有农业。近年来,由于灌溉事业的发展,灌区土壤水盐发生了较大的变化,研究该地区土壤水盐变异规律可为灌区的可持续发展提供科学依据。本文对内蒙古河套灌区四个县的土壤进行采样,通过实验对土壤含水量、含盐量、氧化还原反应电位、pH值、机械组成做了分析。本文分五部分对研究区土壤水盐分布和空间异质性进行了研究。
第一部分论述了本文的研究背景以及国内外对土壤水盐的研究进展,并介绍了本文的基础理论和地统计学的方法。
第二部分介绍了内蒙古河套灌区的概况和本文的采样方法。
第三部分对五个样点的土壤含水量、含盐量、氧化还原反应电位、pH值、机械组成进行了分析比较,发现其规律性。
第四部分采用地统计学对研究区五个样点的土壤水盐空间变异规律进行了分析对比,并采用克里金插值法分别对位于内蒙河套灌区东西地区的乌拉特前旗和磴口绿洲土壤水盐的空间分布格局进行探讨。
第五部归纳了论文的主要结论,并对论文的不足之处做了总结,希望以后的工作可以将其进一步完善。
Oasis is one of the peculiar ecological landscapes in arid areas,and is the main space on which human beings rely for existence and development in arid areas. In arid region,water is the basic condition of oasis shap and development and the blood of oasis agricultural production.Oasis agricultural must rely on irrigating. But if the irrigatnig is unreasonbale,it can cause wasting and shortage of water resource and salinization etc. and the deterioration of the eoclogical environment in the oasis finally. Soil salinization in arid areas is the major factor for the land degradation and has seriously influenced the sustainable development of oasis agriculture. So study on spatial heterogeneity of soil water and salinity can provide certain scientific dieretions for sustainbale development in arid region.But the domestic and intenrational study on this respect is concentrated on qualitative analysis and research mainly at present,little to quantitativ analysis and researeh.
Hetao irrigation district in Inner Mongolia locates in the north-west arid regions of China. It is a typical area of salinization.Climate is dry and precipitation is little, parent materials contains salt,high underground water level. In the process of irrigating , salinization was produced. Agricultural must rely on irrigatnig.If there is no irrgating,the agriculture should not be developed. For the past few years,because of the development of irrigation, the condition of soil water and salinity in irrgation district has changed a lot.Study on the law of the soil water and salinity in this area can provide a foundation of sustainbale development. The author has carried out sampling in four county town in irrgation district of Mongolia.Through test of soil samples in laboratory,analyzing the soil water,soil salinity,soil pH value,soil sand content,soil silt content,and soil clay content.the article including five chapters. to analysis the spatical variation of soil water and salinity.
Chapters 1 mainly introduces the background of the selected title,study meaning,and research status quo in soil water and salinity.and introduces the rationale of this research.
Chapters 2 introduces the research area survey and the way to sampling and experiment.
Chapters 3 compare the soil water,oil salinity,soil pH value,soil sand content,soil sailt content,and soil clay content of 5 sampling point of the research survey,to find the regularity.
Chapters 4 the soil water and salinity of the 5 sampling point was studied by geostatistical method.Combined analysis results and utilized inserting value of kriging,make pattern map of space distribution of soil water and salinity of dieffernt soil layers in Wulateqianqi and Dengkou oasis,which located in west and east of the Hetao irrgation district.
Chapters 5 summarizes cenrtal conclusion of the thesis.Meanwhile,the deficiency and the future reserch derection were put forward
内蒙古河套灌区位于中国西北内陆,气候干旱,降水稀少,土壤母质含盐,地下水位较高,在灌区发展的过程中,产生了较为严重的土壤次生盐渍化问题,是我国土壤盐渍化发育的典型地区,农业生产主要依靠灌溉,没有灌溉就没有农业。近年来,由于灌溉事业的发展,灌区土壤水盐发生了较大的变化,研究该地区土壤水盐变异规律可为灌区的可持续发展提供科学依据。本文对内蒙古河套灌区四个县的土壤进行采样,通过实验对土壤含水量、含盐量、氧化还原反应电位、pH值、机械组成做了分析。本文分五部分对研究区土壤水盐分布和空间异质性进行了研究。
第一部分论述了本文的研究背景以及国内外对土壤水盐的研究进展,并介绍了本文的基础理论和地统计学的方法。
第二部分介绍了内蒙古河套灌区的概况和本文的采样方法。
第三部分对五个样点的土壤含水量、含盐量、氧化还原反应电位、pH值、机械组成进行了分析比较,发现其规律性。
第四部分采用地统计学对研究区五个样点的土壤水盐空间变异规律进行了分析对比,并采用克里金插值法分别对位于内蒙河套灌区东西地区的乌拉特前旗和磴口绿洲土壤水盐的空间分布格局进行探讨。
第五部归纳了论文的主要结论,并对论文的不足之处做了总结,希望以后的工作可以将其进一步完善。
Oasis is one of the peculiar ecological landscapes in arid areas,and is the main space on which human beings rely for existence and development in arid areas. In arid region,water is the basic condition of oasis shap and development and the blood of oasis agricultural production.Oasis agricultural must rely on irrigating. But if the irrigatnig is unreasonbale,it can cause wasting and shortage of water resource and salinization etc. and the deterioration of the eoclogical environment in the oasis finally. Soil salinization in arid areas is the major factor for the land degradation and has seriously influenced the sustainable development of oasis agriculture. So study on spatial heterogeneity of soil water and salinity can provide certain scientific dieretions for sustainbale development in arid region.But the domestic and intenrational study on this respect is concentrated on qualitative analysis and research mainly at present,little to quantitativ analysis and researeh.
Hetao irrigation district in Inner Mongolia locates in the north-west arid regions of China. It is a typical area of salinization.Climate is dry and precipitation is little, parent materials contains salt,high underground water level. In the process of irrigating , salinization was produced. Agricultural must rely on irrigatnig.If there is no irrgating,the agriculture should not be developed. For the past few years,because of the development of irrigation, the condition of soil water and salinity in irrgation district has changed a lot.Study on the law of the soil water and salinity in this area can provide a foundation of sustainbale development. The author has carried out sampling in four county town in irrgation district of Mongolia.Through test of soil samples in laboratory,analyzing the soil water,soil salinity,soil pH value,soil sand content,soil silt content,and soil clay content.the article including five chapters. to analysis the spatical variation of soil water and salinity.
Chapters 1 mainly introduces the background of the selected title,study meaning,and research status quo in soil water and salinity.and introduces the rationale of this research.
Chapters 2 introduces the research area survey and the way to sampling and experiment.
Chapters 3 compare the soil water,oil salinity,soil pH value,soil sand content,soil sailt content,and soil clay content of 5 sampling point of the research survey,to find the regularity.
Chapters 4 the soil water and salinity of the 5 sampling point was studied by geostatistical method.Combined analysis results and utilized inserting value of kriging,make pattern map of space distribution of soil water and salinity of dieffernt soil layers in Wulateqianqi and Dengkou oasis,which located in west and east of the Hetao irrgation district.
Chapters 5 summarizes cenrtal conclusion of the thesis.Meanwhile,the deficiency and the future reserch derection were put forward
引文
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