盐碱土改良过程中易溶性盐分的变化规律

本研究对苏打化硫酸盐草甸盐土改良过程中易溶性盐分的变化规律作了初步探讨。在两年改良过程中土壤的０～６０ｃｍ深度内易溶性盐总量第一年稳定下降，第二年开始上升。ＨＣＯ－３含量第一年变化不大，而第二年明显增加；Ｃａ２＋和Ｍｇ２＋的变化不明显；Ｎａ＋和Ｃｌ－明显向下层淋溶。试验结果表明：适量灌溉、施用石膏并结合种植草木樨和碱茅等耐盐作物，是改良苏打化硫酸盐草甸盐土较有效的方法。

Variations of Soluble Salts in Soda Sulphate Meadow Solonchak Reclaimation Ayi Xia Mu (College of Agronomy)

This work reports on the Variations of soluble salts in soda sulphate meadow solonchak reclaimation.It shows that the soluble salt contents decrease steadily in the first 60cm of the surface in the first year,but increase apain in the next year,and the HCO - 3,Ca 2 ,Mg 2 contents vary slightly,the Na and Cl - contents drop greatly. The result indicats that irrigating and using gypsum and planting alfalfa(medicago.L) have good effects on the soda sulphate meadow solonchak reclaimation.