Three dimensional evaluation on soil improvement effect of saline alkali soil in Yellow River Delta

Abstract

It is necessary to evaluate the effect of soil improvement after land consolidation for productivity improvement, but the current evaluation method is relatively single. In this paper, based on the data of soil salt content from monitoring and sampling, the statistical characteristics were analyzed by SPSS software, and the three-dimensional distribution map was constructed by using GMS10.0 software for IDW interpolation. The results showed that the soil salt content in 2019 decreased significantly by 31.29% compared with that in 2018 from the characteristics of cultivated layer, and the effect of soil improvement was obvious. From the profile characteristics, the soil salt content in the study area is characterized by “surface accumulation”. The salt content of soil profile decreased significantly at maize maturity stage compared with that before sowing. The decrease rates of soil salt content at different depths were 70.11% (0-20cm), 77.43% (20-40cm), 77.31% (40-60cm), 83.34% (60-80cm) and 65.26% (80-100cm), respectively. The decrease rate of 60-80cm soil layer was the largest. The results can be used as a reference for single index or comprehensive index three-dimensional visualization evaluation of soil improvement effect.