In order to investigate soil erosion processes for the Eucalyptus grandis×E.urophylla industrial plantations and other land use types

a comparative study of the characteristics of runoff and sediment yields from various slopes was made by runoff plot experiment.Results showed that E.grandis×E.urophylla plantations could better adjust runoff and reduce soil erosion.Among the three land use types investigated

runoff yielded from grassland was the most

which was 1.1 times of that from shrubland and 1.9 times of that from the E.grandis×E.urophylla plantations.Land uses

in terms of runoff yield

ranked in the descending order of grassland

shrubland

and E.grandis×E.urophylla plantations.Runoff yield between the E.plantations and grassland was very significantly different

while runoff yield between E.grandis×E.urophylla plantations and shrubland

significantly different.However

sediment yielded from shrubland was the highest

which was 1.3 times of that from grassland and 2.9 times of that from E.grandis plantations.Land uses

in terms of sediment yield

was in the descending order of shrubland

grassland

and E.grandis×E.urophylla plantations.There was very significant difference in sediment yield between the E.grandis×E.urophylla plantations and shrubland and significant difference in sediment yield between the E.grandis×E.urophylla plantations and grassland.Runoff yield from E.grandis×E.urophylla plantations was 47.83% less than that from grassland and sediment yield

55.90% less.There was no linear relation between runoff yield and sediment yield from different land use types.The results from the study provide not only more scientific and objective assessments for the relationship between runoff yield and sediment yield from E.grandis×E.urophylla plantations and the benefits of soil and water conservation

but also a theoretical basis and scientific evidences for its sustainable management.