论文部分内容阅读
为了使得客土基盘造林技术在滨海泥质盐碱地造林绿化应用中有充分的理论依据,以河北唐山市南堡开发区盐渍化土壤为研究对象,通过野外试验,研究了客土基盘造林法对滨海盐渍土水盐运移规律的影响,并比较了不同客土配比方式的排盐、降盐效果。结果表明,对照组(未经改造的原状土)土壤含水量变化规律与降水量变化规律相同或稍有滞后,处理组(以不同客土配比方式制作的客土基盘A1、A2、A3、A4)同样受降水规律的影响,但各土层含水量变化幅度差异较大,且峰值的出现时间不同,不同客土配比方式对0～20cm、40～60cm土层含水量影响具有显著性差异,对20～40cm、60～80cm影响无显著性差异。对照组含盐量变化与含水量变化存在显著负相关关系,观测结束时,返盐程度剧烈;而处理组则无显著相关关系,总体含盐量保持持续降低。4种不同客土配比方式对各土层含盐量变化影响具有显著性差异,平均含盐量均有大幅下降,总体降盐效果:A1>A3>A2>A4,植物根区含盐量下降效果:A1>A2>A4>A3。综合分析,以A1处理方式,即原状土与基质土以1:2配比制作的客土基盘排盐降盐效果最好。
In order to make the basement afforestation techniques of guest land have a sufficient theoretical basis in the application of afforestation and afforestation in the coastal muddy saline-alkali lands, take the salinized soils of Nanpu Development Zone in Tangshan, Hebei as the research object, through field experiments, Law on Coastal Saline Soil Water and Salt Transport Law, and compared the different methods of soil and water ratio of salt, salt reduction effect. The results showed that the variation law of soil water content in the control group (undisturbed undisturbed soil) was the same as or slightly lagged behind that of the precipitation. The treatment group (arable land bases A1, A2, A3 , A4) are also affected by the precipitation law, but the variation range of water content in each layer is quite different, and the appearance time of the peak is different. The different soil and water content ratio has significant effects on the water content of 0 ~ 20cm and 40 ~ 60cm soil layers Sex differences, 20 ~ 40cm, 60 ~ 80cm no significant difference. There was a significant negative correlation between the change of salinity and the change of water content in the control group. When the observation was over, the degree of return salt was drastic. However, there was no significant correlation between the salt content and the salinity of the treatment group. The results showed that there were significant differences in the salinity content of the four soil layers and the average salt content of four soil layers decreased significantly. The overall salinity reduction effects were A1> A3> A2> A4, Falling effect: A1> A2> A4> A3. Comprehensive analysis, to A1 treatment, that is, undisturbed soil and matrix soil to produce 1: 2 ratio of customer base soil preparation salt desalt salt best.