In recent years, the gully erosion cutting up the cultivated land in the black soil region has become more and more serious, which has caused severe the loss of nutrients, the decline in the quality of arable land and other problems. Two towns in Binxian County of the Heilongjiang Province were selected as the study areas, "3S" techniques and statistical models were used to explore the effects of gully erosion on soil organic matter (SOM), total nitrogen (TN), total phosphorus (TP) and available potassium (AK), to explore the effects of gully erosion under different directions of tillage ridge on the four nutrients, in which horizontal ridge or dip ridge was referred to crop ridge vertical or horizontal with plots slope aspect. The results indicated that: gully erosion had a great influence on soil nutrient contents, compared with non-gully erosion area, SOM and TN in gully erosion area decreased by 33.43% and 46.67%, respectively, but the changes of AK and TP were not obvious. Straw mulching could effectively reduce the loss of soil nutrients in gully erosion area. Gully erosion also weakened the correlation between SOM and TN. SOM and TN were non-gully erosion region> dip ridge >horizontal ridge, dip ridge tillage is better than horizontal ridge one in maintaining fertility in gully area.
Gully erosionDirection of tillage ridgeSoil nutrientBlack soil region
国家科技期刊平台
NSTL
维普
万方数据
