【摘要】 通过2年在黄河三角洲进行海水灌溉对土壤性质的影响研究,结果表明:海水灌溉后土壤剖面中盐分含量有所上升,并在0～100cm土层中有盐分积累现象;土壤中存在的盐分主要以NaCl为主,Na+和Cl-与土壤全盐含量呈直线线性相关,且达到极显著水平;海水灌溉后土壤的钠吸附比(SAR)在0～60cm土层内有所升高;土壤的pH值在海水灌溉前后基本没有什么变化;残余碳酸钠(RSC)都为负值。因此,在黄河三角洲地区运用海水灌溉不会引起土壤的碱化,并使土壤性质变差,但在海水灌溉过程中必须防治次生盐渍化的发生。更多还原

【Abstract】 The effect of seawater irrigation to soil propertied was studied in the Yellow River Delta two years. The results were as follows: the salt content increased in soil profiles after seawater irrigation. The salt accumulated in 0~100 cm soil layers. The main composition of salt in soil is NaCl. Na~+ and Cl~- was in a sharp positive relation with the salt content of soil and changed with straight line. Sodium-adsorption ratio (SAR) of soil had risen in 0~60 cm soil layer after seawater irrigation. The pH value of soil did not change any more and the residual sodium carbonate (RSC) was negative value before and after seawater irrigation. Therefore, applying the seawater irrigation could not cause alkalization of soil and soil properties became badly in the Yellow River Delta. But secondary salinization must be prevented in the process of seawater irrigation.更多还原