The effects of reclaimed land on soil aggregates under different land use patterns in the hilly-gully regions of Loess Plateau were studied to provide the scientific basis for improving soil stability and productive performance of reclaimed land. Five different land use types after reclamation of degraded cultivated land

included forestland (F treatment)

rice (R treatment)

maize (M treatment)

vegetable (V treatment) and wasteland (CK treatment)

were studied in the Nanniwan gully area of Yan'an

Shaanxi Province. The mean weight diameter (WMD)

geometric mean diameter (GMD)

aggregate processing damage rate (PAD) and fractal dimension (D) of >0.25 mm aggregates in wet sieve method and dry sieve of 0 ~ 40 cm soil layer soil were measured. The results showed that: (1)The number and size of soil aggregates in 0-40 cm soil layer were significantly better than those in CK treatment. The content of >0.25 mm aggregate (DR0.25) and (WR0.25) in 0-40 cm soil layer showed the opposite trend with the increase of soil depth. (2)The order of mean weight diameter (MWD) and geometric mean diameter (GMD) of soil treated by dry sieve method and wet sieve method was F treatment>R treatment>M treatment>V treatment>CK treatment

F treatment and R treatment on soil aggregates increased significantly than other treatments. (3)The results of wet sieve analysis showed that the PAD of soil aggregates in 0-40 cm soil layer showed similar Z-shaped trend

and the treatments were significantly lower than CK. (4)The fractal dimension (D) of each treatment was in the order of F treatment