关键词: 长江流域, 长江流域

Abstract:

In order to provide sufficient theoretical basis for the template with carrying soil for afforesting on coastal muddy saline land, the author took the saline soil of Nanpu economic development area in Tangshan, Hebei Province as the research object. A field experiment was conducted to research the effect of template with carrying soil for afforesting on the dynamic of water and salt of coastal saline soil and compared the effect of salinity reducing between different template with carrying soil. The results showed that the law of soil water content of control group (not transform undisturbed soil) were the same with rainfall or there was a slight lag. The treatment group (template with carrying soil are made in different ways which were numbered A1, A2, A3, A4) also had the effect of rainfall, but there was significant differences between water content of each layer and the peak appear on different time. There were significant differences between influence of each manufacture ways on water content of 0-20 cm, 40-60 cm soil layer, but 20-40 cm, 60-80 cm soil layer are opposite. There was very significant negative correlation between the changes of salt and moisture of control group, and salt content was severe increased at the end of observation; on the contrary, the treatment group had no significant correlation relationship, the change tendency of salt content remain lower overall. There were significant differences between each manufacture ways on salt content of each soil layer, the reduce degree of average salt content of each treatment group was larger than the corresponding control group. The overall effect of salt content reducing rank was A1>A3>A2>A4; the effect of salt content reducing rank of root zone was A1>A2>A4>A3. Comprehensive analysis, the effect of reducing salt content of template with carrying soil of A1 which was produced by primary state soil and substrate soil with 1:2 was better than the others.