《Table 1 Land-use type, vegetation, topography and restoration time for the selected sites》

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《"Changes in soil properties and erodibility of gully heads induced by vegetation restoration on the Loess Plateau, China"》

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Note:CZ，slope cropland of Zea mays L.；GA，grassland community of Artemisia annua L.；GAC，mixed grassland community of Agropyron cristatum（L.）Gaertn.and A.annua.；GC，grassland community of A.cristatum；GCC，mixed grassland community of A.cristatum and Cle

The study was conducted from June to August 2016.We selected a control site in a slope cropland（CZ，slope cropland of Zea mays L.）and 9 sites in 3 restored land-use types，including 5 sites in grassland（GA，the grassland community of Artemisia annua L.；GAC，the mixed grassland community of Agropyron cristatum （L.）Gaertn.and A.annua.；GC，the grassland community of A.cristatum；GCC，the mixed grassland community of A.cristatum and Cleistogenes caespitosa K.；GCV，the mixed grassland community of C.caespitosa and Artemisia vestita Wall.ex Bess） ，3in woodland（WP，the black locust woodland of Robinia pseudoacacia L.；WO，the cypress woodland of Platycladus orientalis （L.）Franco；WSO，the mixed woodland of Armeniaca sibirica（L.）Lam and Acer oliverianum Pax） and 1 in shrubland（SR，the shrubland of Hippophae rhamnoides L.）based on a detailed investigation of land uses and vegetation community types in some typical gully heads（Fig.1；Table 1）.It should be noted that we selected the sites with similar slope aspect，slope gradient，elevation，soil type and previous farming practices to minimize effects on the results.Further，we selected 5 typical grass communities as representative grassland according to the natural successional process of grass vegetation.The primary planted woodland types were R.pseudoacacia，Platycladus orientalis（L.）Franco and mixed forest of A.sibirica and A.oliverianum.Because of the intense human activity，few shrubs were present in the study area，and the typical shrub tree is H.rhamnoides.