Soil loss tolerance in the black soil region of Northeast China

2012 ◽  
Vol 22 (4) ◽  
pp. 737-751 ◽  
Author(s):  
Xingwu Duan ◽  
Yun Xie ◽  
Baoyuan Liu ◽  
Gang Liu ◽  
Yanjie Feng ◽  
...  
Keyword(s):  
Northeast China ◽  
Soil Loss ◽  
Black Soil ◽  
Black Soil Region ◽  
Soil Loss Tolerance ◽  
Loss Tolerance

Soil loss and conservation in the black soil region of Northeast China: a retrospective study

2010 ◽  
Vol 13 (8) ◽  
pp. 793-800 ◽  
Author(s):  
X.Z. Xu ◽  
Y. Xu ◽  
S.C. Chen ◽  
S.G. Xu ◽  
H.W. Zhang
Keyword(s):  
Retrospective Study ◽  
Northeast China ◽  
Soil Loss ◽  
Black Soil ◽  
Black Soil Region

scholarly journals Evaluating of the spatial heterogeneity of soil loss tolerance and its effects on erosion risk in the carbonate areas of southern China

Solid Earth ◽  
2017 ◽  
Vol 8 (3) ◽  
pp. 661-669 ◽  
Author(s):  
Yue Li ◽  
Xiao Yong Bai ◽  
Shi Jie Wang ◽  
Luo Yi Qin ◽  
Yi Chao Tian ◽  
...  
Keyword(s):  
Soil Erosion ◽  
Spatial Heterogeneity ◽  
Soil Loss ◽  
Carbonate Rock ◽  
Southern China ◽  
Clastic Rock ◽  
Erosion Risk ◽  
Soil Loss Tolerance ◽  
Loss Tolerance ◽  
The Relationship

Abstract. Soil loss tolerance (T value) is one of the criteria in determining the necessity of erosion control measures and ecological restoration strategy. However, the validity of this criterion in subtropical karst regions is strongly disputed. In this study, T value is calculated based on soil formation rate by using a digital distribution map of carbonate rock assemblage types. Results indicated a spatial heterogeneity and diversity in soil loss tolerance. Instead of only one criterion, a minimum of three criteria should be considered when investigating the carbonate areas of southern China because the one region, one T value concept may not be applicable to this region. T value is proportionate to the amount of argillaceous material, which determines the surface soil thickness of the formations in homogenous carbonate rock areas. Homogenous carbonate rock, carbonate rock intercalated with clastic rock areas and carbonate/clastic rock alternation areas have T values of 20, 50 and 100 t/(km2 a), and they are extremely, severely and moderately sensitive to soil erosion. Karst rocky desertification (KRD) is defined as extreme soil erosion and reflects the risks of erosion. Thus, the relationship between T value and erosion risk is determined using KRD as a parameter. The existence of KRD land is unrelated to the T value, although this parameter indicates erosion sensitivity. Erosion risk is strongly dependent on the relationship between real soil loss (RL) and T value rather than on either erosion intensity or the T value itself. If RL > > T, then the erosion risk is high despite of a low RL. Conversely, if T > > RL, then the soil is safe although RL is high. Overall, these findings may clarify the heterogeneity of T value and its effect on erosion risk in a karst environment.

Chronic effects of different fertilization regimes on nirS-type denitrifier communities across the black soil region of Northeast China

Pedosphere ◽  
2020 ◽  
Vol 30 (1) ◽  
pp. 73-86 ◽  
Author(s):  
Xiaojing HU ◽  
Junjie LIU ◽  
Dan WEI ◽  
Ping ZHU ◽  
Xi'an CUI ◽  
...  
Keyword(s):  
Northeast China ◽  
Black Soil ◽  
Chronic Effects ◽  
Black Soil Region ◽  
Denitrifier Communities

scholarly journals Characteristics of Material Migration During Soil Erosion in Sloped Farmland in the Black Soil Region of Northeast China

2019 ◽  
Vol 12 ◽  
pp. 194008291985683 ◽  
Author(s):  
Congying Shen ◽  
Yu Wang ◽  
Lanpo Zhao ◽  
Xiaohong Xu ◽  
Xiankun Yang ◽  
...  
Keyword(s):  
Soil Erosion ◽  
Specific Surface ◽  
Surface Area ◽  
Soil Nutrients ◽  
Northeast China ◽  
Fine Particles ◽  
Clay Content ◽  
Black Soil ◽  
Available Phosphorus ◽  
Black Soil Region

Loss of soil and water from sloped farmland is a major cause of regional soil degradation and declining productivity. We conducted a preliminary study on the characteristics of sloped farmland in the black soil region of Northeast China using natural rainfall-runoff plot experiments in the field. In 0-20 cm soil depth, clay content (<0.002 mm), silt content (0.002-0.02 mm), specific surface area, <0.002 mm and 0.002 to 0.02 mm microaggregates content, available phosphorus, and total phosphorus tended to increase from the top to the bottom of the slope, while sand content (>0.05 mm), 0.02 to 0.05 mm and 0.05 to 0.25 mm microaggregates content, tended to decline. This suggests that soil material and nutrients were gradually transported from the top to the bottom of the slope because of erosion, soil tended toward desertification in texture, and fertility was degraded. The content of available phosphorus and total phosphorus was positively linearly related to clay content, specific surface area, and 0.002 to 0.02 mm microaggregates content. This indicates that soil nutrients migrated down with fine particles. Therefore, soil erosion leads to the migration and loss of soil nutrients, <0.002 mm fine particles and 0.002 to 0.02 mm microaggregates on the slope, which was the main cause of soil fertility degradation.

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