Effects of long-term sand mixing ameliorating measures on soil salinity characteristics of saline-alkali land in northern Shaanxi

Abstract

To explore different mix sand measures of saline-alkali land improvement effect for a long time, this study in northern shaanxi dingbian county saline-alkali soil as the research object, combined with field experiment and indoor test methods in the wild, analysis and improvement of saline-alkali soil salt and 1 ~ 6 years change characteristics of organic matter, reveal different mix sand thickness of heavy saline-alkali soil salt content and organic matter distribution. The results showed that the overall soil salt content in saline-alkali land did not change regularly with the change of sediment mixing amount or improvement years. There is no significant difference between different thickness (proportion) sand mixing measures on saline-alkali land improvement benefits. As time goes by, the soil salt content in the whole soil layer of saline-alkali land is not significantly changed by sand mixing treatment, but the soil salt content in arable layer is decreasing year by year, and the improvement benefit is significant in the short term. In conclusion, the long-term sand mixing improvement measures are beneficial to the improvement of the cultivated layer of saline-alkali land, thus reducing the salt damage suffered by crops in the process of growth and development, etc., the effects of sand mixing treatment on soil microorganisms and enzyme activities remain to be further explored.