Improvement Effects of Amendment on Saline-Alkali Soil in Seedling Raising Shed of Rice

In order to explore the effect of comprehensive soil amendments on the improvement of saline-alkali soil in rice seedling shed,through field experiments,different dosages of humic acid were set on the basis of equal amounts of gypsum and fungus residue-based aluminum sulfate,which were comparable to the soil bulk density before improvement,the porosity,pH,conductivity,and base ions were compared and analyzed.The results showed that the application of improver S5reduced the soil bulk density from 1.31g·cm-3 to1.21g·cm-3.The porosity increased to 67.50%and the electrical conductivity decreased from 0.36mS·cm-1to 0.260mS·cm-1.And the pH decreased from 9.42to 8.41,changed from alkaline to slightly alkaline,the total salt content significantly reduced from 1.741g·kg-1 to 0.849g·kg-1.The amendment S5had a better effect on the improvement of saline-alkali soil in rice seedling sheds,which can meet the requirements of production and application.