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盐碱土的改良包括“脱盐碱”和“肥力恢复”过程。前者主要靠水利冲洗,但冲洗后土壤肥力下降,农作物很难生长。要使其肥力恢复到能种植作物的水平,往往历时较长。为缩短“肥力恢复”过程,在初步冲洗的基础上,进行了当年种植耐盐碱牧草的试验。结果表明,耐盐碱的牧草不仅有明显的“脱盐碱”作用,还可以加速土壤的“肥力恢复”过程,并在短时间内得到一定的经济收益。
Improvements in saline-alkali soil include “desalination” and “fertility restoration” processes. The former mainly rely on irrigation, but soil fertility decline after washing, crops is difficult to grow. To restore their fertility to the level at which crops can be grown, they tend to last longer. In order to shorten the process of fertility restoration, the experiment of planting saline-alkali-tolerant pasture was carried out on the basis of preliminary rinsing. The results showed that the saline-tolerant pasture not only had the obvious function of “desalination and alkalinity”, but also accelerated the process of “fertility restoration” and obtained some economic benefits in a short period of time.