种植条件下不同调控措施对土壤盐分动态的影响特征

本文研究了种植条件下不同调控措施对土壤表层５ｃｍ处电导率的影响状况并将表层电导率变化曲线划分为三个阶段．分析了施肥、灌溉、覆盖、以及施用改良剂等调控措施，对土壤盐分在不同阶段的过程及机理的差异．施肥、灌溉主要是在作物生长后期对水盐运移发挥作用　，而施用改良剂对前期水平间的差异较大，后期可降低土壤表层电导率．在影响程度上，施　肥与灌溉水平间的差异比覆盖和施用改良剂要明显．

Effects of Different Measurements on Soil Salinity Dynamics Under Cropping

Based on the electric conductivity in 0-5cm soil layer under planting, the curves of electric conductivity could be divided into three parts. And means and mechanism of salinity dynamics under different measurements, including fertilization, irrigation, covering-crop, modifier, were also analyzed. The factors of fertilization and of irrigation had good effects on salinity and water during anaphase of plant growth, whereas the factor of applying modifier had goods effect on prophase. As far as degree was concerned, effects of the former two factors were more obvious than the latter ones.