Abstract:

In order to effectively use the by-product of flue gas desulphurization (BFGD) and probe into the feasibility of plant Elaeagnus angustifolia L. as amelioration of saline-sodic soil pioneer species, the author used field experiment to study the effect of amelioration of saline-sodic soil with the by-product of flue gas desulphurization (BFGD) to plant Elaeagnus angustifolia L. The soil pH value, total salt content, degree of alkalization and the change of ion relative content were measured to study the effect of amelioration of saline-sodic soil with the by-product of flue gas desulphurization (BFGD) to plant Elaeagnus angustifolia L. The results showed that: with the growth time of grove and grass extending, the soil pH value, total salt content, degree of alkalization and the change of ion relative content of the amelioration of saline-sodic soil with the by-product of flue gas desulphurization (BFGD) had declined in some extent. The soil pH value, total salt content and degree of alkalization (ESP) respectively decreased from 9.50, 46 g/㎏ and 5.3% to 8.31, 11.4 g/㎏ and 3.1%; In the third year, the by-product of flue gas desulphurization (BFGD) effectively reduced the exchangeable sodium. These results suggested that the by-product of flue gas desulphurization (BFGD) could reduce exchangeable relative magnesium content in soil, and its toxic effects on plant, furthermore improve soil chemical property, which was conducive to forest growth and development.