Comparison of runoff and soil loss in different tillage systems in the Mollisol region of Northeast China

Effect of Land Use Change on Gully Erosion Density in the Black Soil Region of Northeast China From 1965 to 2015: A Case Study of the Kedong County

“…Among various types of soil erosion, gully erosion is most common and has both on-site and significant off-site ecological effects (Valentin et al, 2005;Cotler and Ortega-Larrocea, 2006;Zucca et al, 2006;Galang et al, 2007;Gutiérrez et al, 2009;Martínez-Casasnovas and García-Hernández, 2009;Dotterweich et al, 2012). Soil erosion has been reported to be especially prominent in the so-called "black soil" region of China (Valentin et al, 2005;Gu et al, 2018;Xu et al, 2018). The black soils of northeast China have been identified as being particularly susceptible to severe gully erosion (Xie et al, 2019).…”

Adsorption and Desorption of Phosphorus in Biochar-Amended Black Soil as Affected by Freeze-Thaw Cycles in Northeast China

“…A better understanding of P adsorption and desorption in agricultural systems is critical for improving P sustainability and increasing crop productivity. The black soil region in northeast China has been one of the most important crop production areas in the country owing to the productive physical and chemical capacity of black soil [7]. However, unsustainable land-use practices (e.g., intensive soybean production) have resulted in a substantial decline in soil fertility during recent decades [8].…”

Erosion hazard evaluation for soil conservation planning that sustains life expectancy of A horizon: the Black Soil Region of China

“…Density of ephemeral gullies and classic gullies was 1.1 km/km 2 and 0.7 km/km 2 in typical small watersheds, respectively (Zhang et al, 2016). Soil erosion in the BSR can be significant because contour farming is rare, whereas, longitudinal ridge system (LRS), in which long straight rows oriented according to the parcel's borders, is the conventional tillage system in the BSR (Xu et al, 2018). Given that rows in the BSR tend to be extremely long with slope lengths that range from 200 m to 1000 m (Liu et al, 2011;Li et al, 2016), LRS involves undulating rows with sections inevitably aligned with the contour and other sections aligned more up and down slope.…”

“…The combination of the LRS on the undulating terrain inevitably results in significant slope gradients along furrows, which combined with long rows provides conditions for excessive erosion. Detachment of soils by water can be rather strong in these sloping furrows, especially in the long slope cases (Xu et al, 2018). Secondly, plant residue is rarely returned to soils.…”

“…By 2200, crop yield decrease was only 4% under Combo 1 and Combo 2. Xu et al (2018) recommended flat tillage systems for the BSR because in laboratory test it exhibited lower runoff and soil loss than ridge systems whether on contour or up and down slopes. An alternative that may improve the performance of conventionally tilled ridge systems is the use of furrow dikes which are essentially small check dams at intervals along the furrows.…”