Rain energy and soil amendments effects on infiltration and erosion of three different soil types [Israel]
1991
Levin, J. | Ben-Hur, M. | Gal, M. | Levy, G.J. (Volcani Centre, Dagan (Israel). Inst. of Soils and Water)
Soil samples from the surface 0-250 mm were studied using a drip-type simulator for a Typic Chromoxerert (TC), a Typic Rhodoxeralf (TR), and a Calcic Haploxeralf (CH) soil. Soil amendments were phosphogypsum (PG) and a combined application of an anionic polyacrylamide (PAM) with PG. An increase in the impact energy of the raindrops reduced depth of rain before ponding, final infiltration rate (FIR), cumulative infiltration and increased soil erosion. The addition of PAM+PG to the soil surface significantly increased the infiltration parameters and reduced erosion compared with the PG and control treatments. The TC soil was the least susceptible to sealing. The TR soil with the lowest specific surface area was the most susceptible to clay dispersion, and seal formation. Relative to the TC and the TR soils, the CH was intermediate in its susceptibility to seal formation.
Показать больше [+] Меньше [-]