山东省东明县盐碱土分析及防治

本研究通过多渠道的实地调查,了解到研究区内盐碱土的分布、危害、当地农民的一些防治方法以及取得的效果,并结合有关方面的资料从地下水、气候、成土母岩、地形和灌溉5个方面讨论了该区盐碱土的成因。对所采土样利用5∶1的水土比制备土壤浸出液,然后依次测定土壤的pH值、电导率及Ca2+、Na+、Mg2+、K+,SO42-、C l-、HCO3—和CO32-8种离子含量。通过以上工作得出该区盐碱土整体呈平行黄河的带状,属于pH值较高、盐渍化程度较重的盐化土,主要盐分为NaC l、Na2SO4。

THE ANALYSIS AND PREVENTION OF SALINE-ALKALI SOIL IN DONGMING,SHANDONG

The authors summarize the distribution,harm, some improved measures about saline-alkali soil in Dongming country through field survey and discuss the formed factors of saline-alkali soil by ground water,weather,mother rock,landform and irrigation.Through chemical analysis of extract liquid from soil,the authors measure pH value,electric conductivity,the amount of Ca~(2+),Na~+,Mg~(2+),K~+,SO~(2-)_4,Cl~-,HCO~-_3,and CO~(2-)_3.Finally,the authors conclude that Saline soil is developed throughout the region,which is zonary and parallelling the Yellow river and has higher pH value,more severe salinization,and the chief saline of this soil is NaCl and Na_2SO_4.