بررسي اثر ماده شيميايي پلي اكريل آميد بر فرسايش و رواناب خاكها

A Study of the Effects of Polyacrylamide on Soil Erosion and Runoff

Polyacrylamide (PAM) was applied on three different textured soils with textures of clay loam, loam and loamy sand.. Next to sample preparation, 10, 20 and 30 kg/ha of PAM were added to soil surfaces. Samples were exposed to rains produced by mini rainfall simulator with an intensity of 39 mm/h. The resulted runoff and sediment was collected and measured. The same procedure was conducted for a rainfall with an intensity of 79 mm/h. The results revealed that all levels of PAM decreased the amounts of runoff and sediment significantly as compared to control. At 39mm/h intensity, loam and loamy sand soils release the least amount of sediment when treated with 10 kg/ha of PAM. Clay loam soil had the minimum amount of sediment in treatment of 20 kg/ha of PAM. At 79mm/h intensity, all soil samples with 30kg/ha of PAM produced the minimum amounts of sediment. All soils at 39 and 79mm/h rain intensity showed the minimum runoff in 10kg/ha of PAM treatment. The loamy sand soil did not produce any runoff at 39mm/h rain intensity in any level of PAM treatment.