A number of saline soil improvement materials were tested in meadow saline soils of the Hexi Corridor in terms of soil physiochemical properties

corn yield and economic effects.The results show that composite A2B3C3D1E2(aluminum sulfate 800 g

sulfur 900 g

gypsum 4 500 g

furfural residue 800 g

and polyethylene glycol 60 g) is the best saline-alkali soil improvement materials with consideration of all factors.The application amount of each improvement material was positively correlated with total porosity

aggregate composition

natural water storage

and the desalting rate

and was negatively correlated bulk density

pH

EC

and total salt content.With the application rates of 0.61

1.22

1.85 t/hm2

the seedling growth

botanical characteristics and yield of corn were improved correspondingly.With application rates greater than 1.85 t/hm2

the efficiency of saline improvement materials decreased.The marginal production value

marginal profit

production increase

profit

and the ratio of profit to input reached the maximum values with the application rate of 1.85 t/hm2.Saline soil improvement material suitable dosage of 1.83 t/hm2

the corn yield forecast 6.29 t/hm2

and field trial results was consistent with the 4th treatment.