[Objective] To research the effects of two seedlings[tissue culture seedling(P1) and seed seedling(P2)] of Eucalyptus grandis plantation on soil anti-erodibility.[Methods] Soil samples of 0-10c m

10-20 cm and 20-30 cm were collected with ring-knife and plastic box to determine the index as soil bulk density

non-capillary porosity

capillary porosity

total porosity

soil aeration porosity and water stable aggregates content

etc.[Results] The soil bulk density in the two seedling plantation lands increased at the downward soil profiles

while total porosity and soil aeration porosity decreased with the increase of soil depth. The soil bulk density in P1 was significantly lower than that in P2. The total porosity and soil aeration porosity in P1 were significantly higher than those in P2. Water stable index

soil erosion resistance

aggregate condition

aggregate degree and structure coefficient in the two kinds of plantations decreased with the increase of soil depth

while the soil dispersion rate and dispersion coefficient increased. The water stability and resistance to corrosion index were both significantly different at the 0.05 level. Soil erosion resistance and structure coefficient in P1 were higher than those in P2

while the dispersion coefficient was lower than that in P2. Contents of water-stable aggregate in all size and MWD(mean weight diameter) in both plantations decreased with the increase of soil depth

while soil structure damage rate increased. Contents of water-stable aggregate in different size(>5 mm

5~2 mm

0.5~0.25 mm

>0.5 mm

>0.25 mm) and MWDS in P1 were higher than those in P2

while the structure damage rate

and water-stable aggregate in sizes of 2~1 mm and 1~0.5 mm in P1 were lower than those in P2.[Conclusion] Soil anti-erodibility in P1 was higher than that in P2

in the present study condition.