Improvement Effects of Different Ameliorants and Their Combinations on Coastal Saline-alkali Soil in the Yellow River Delta
With maize as the research object,we conducted a pot experiment to firstly explore the soil improvement effects of desulfurization gypsum,vermicompost,sulfur,furfural residue and zeolite,then designed the appropriate combinations of ameliorants for both improving maize growth and soil properties.The results showed that the average pH value in the 0 20 cm soil layer with desulfurization gypsum,sulfur,furfural residue,vermicompost and zeolite treatments were decreased by 0.05～0.19 units under the slight saline-alkali conditions,and by 0.20～0.33 units under the moderate saline-alkali conditions,compared to the control treatment.In addition,desulfurization gypsum significantly reduced soil water-soluble Na+ content in the 0 20 cm soil layer.According to the improved characteristics of different ameliorants,two combinations ameliorants of T1 (desulfurization gypsum + sulfur + vermicompost) and T2 (vermicompost + zeolite + desulfurization gypsum + furfural residue) with comprehensive improvement effect were designed.These two combinations significantly increased maize biomass by 77.75％ and 129.22％ under the slight saline-alkali conditions,and by 148.13％ and 170.31％ under the moderate saline-alkali conditions,respectively.Meanwhile,they reduced the pH value of 0-20 cm surface soil.In conclusion,the application of the comprehensive ameliorants in coastal saline soils could promote crop growth and improve soil properties,which could be used as one of the important measures for the rapid improvement of coastal saline soil in the future.
国家科技期刊平台
NSTL
万方数据
维普
