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为渭-库河绿洲植棉土壤盐渍化的治理、改良及合理利用提供一定的理论基础和科学依据,笔者通过筛选渭-库河绿洲植棉土壤上典型的野外考察路线、GPS定点、取样测定,并对植棉土壤不同土层总盐、盐离子含量以及盐离子间进行相关性分析。研究结果表明:植棉土壤不同土层盐分含量分别:0~10 cm 1.555%,10~30 cm 0.454%,30~50 cm 1.082%;p H:0~10 cm p H 8.09,10~30、30~50 cm p H 8.59左右;平均含盐量分别为15.549、4.548、10.821 g/kg。不同深度土层的盐分含量从大到少顺序依次为0~10 cm>30~50 cm>10~30 cm,属于盐化土壤。相关性分析结果表明:在研究区植棉土壤不同土层的全盐量、p H、HCO3-、Cl-、Ga2+、SO42-、K++Na+、Mg2+之间的相关性基本上呈显著到极显著正相关,尤其是表层土壤中SO42-与K++Na+的相关系数达到了0.98,硫酸物在表层土壤积聚强烈,盐分以向上运行为主。
In order to provide some theoretical and scientific basis for the management, improvement and rational utilization of cotton-soil salinization in the Oasis-Kuhe oasis, the author selected the typical field investigation route, GPS fixed point, sampling The correlations between total salt, salt ion content and salt ions in different soil layers of cotton soil were also analyzed. The results showed that the salt content in different soil layers of cotton soil were 0 ~ 10 cm 1.555%, 10 ~ 30 cm 0.454%, 30 ~ 50 cm 1.082%, p H: 0 ~ 10 cm p H 8.09,10 ~ 30, 30 ~ 50 cm p H about 8.59; average salt content were 15.549,4.548,10.821 g / kg. The salt content in different depth soil layers is 0 ~ 10 cm> 30 ~ 50 cm> 10 ~ 30 cm in descending order, belonging to salinized soil. The results of correlation analysis showed that the correlation between total salt content, p H, HCO3-, Cl-, Ga2 +, SO42-, K ++ Na + and Mg2 + in different soil layers of cotton soil in the study area was basically significant The correlation coefficient between SO42- and K + + Na + in topsoil reached 0.98. Sulfuric acid accumulated strongly in the surface soil and the salinity mainly ran upward.