Determination of purple soil loss tolerance based on soil productivity in southwest China

2013 ◽  
Vol 68 (2) ◽  
pp. 146-152 ◽  
Author(s):  
S. Du ◽  
A. Chen ◽  
G. Liu
Keyword(s):  
Soil Loss ◽  
Southwest China ◽  
Purple Soil ◽  
Soil Productivity ◽  
Soil Loss Tolerance ◽  
Loss Tolerance

Determination of Soil Loss Tolerance of an Entisol in Southwest China

2009 ◽  
Vol 73 (2) ◽  
pp. 412-417 ◽  
Author(s):  
Gangcai Liu ◽  
Lan Li ◽  
Laosheng Wu ◽  
Genxu Wang ◽  
Zhonghao Zhou ◽  
...  
Keyword(s):  
Soil Loss ◽  
Southwest China ◽  
Soil Loss Tolerance ◽  
Loss Tolerance

Assessment of the spatial distribution of global soil loss tolerance by using the productivity index method

2020 ◽  
Author(s):  
Lizhi Jia ◽  
Wenwu Zhao
Keyword(s):  
Land Use ◽  
Soil Loss ◽  
Global Scale ◽  
Productivity Index ◽  
Soil Productivity ◽  
Index Method ◽  
Land Use Types ◽  
Soil Loss Tolerance ◽  
Loss Tolerance ◽  
T Values

<p>The soil loss tolerance (T value) is the ultimate criterion for determining whether a soil has potential erosion risks. While the existing T value criteria are mainly on national scale, and lack of consideration of the differences in soil erosion, soil properties and soil productivity between different types of land use. We calculated the global T value by using the productivity index method. The global T values ranged from 0.84 to 4.99 Mg ha<sup>-1</sup> yr<sup>-1</sup>, with an average of 1.49 Mg ha<sup>-1</sup> yr<sup>-1</sup>. The distribution of T values in global scale demonstrated significant spatial differences, and the range of T values in most regions of the land (98.23%) was between 1.0 and 2.0 Mg ha<sup>-1</sup> yr<sup>-1</sup>. The mean T values varied from c ontinent to continent, with Africa and Oceania having higher mean T values than other continents. The T values between different land use types varied widely, and the T values of five land use types were as follows: cropland (1.67 Mg ha<sup>-1</sup> yr<sup>-1</sup>) > shrubland (1.61 Mg ha<sup>-1</sup> yr<sup>-1</sup>) > grassland (1.59 Mg ha<sup>-1</sup> yr<sup>-1</sup>) > forestland (1.38 Mg ha<sup>-1</sup> yr<sup>-1</sup>) > wetland (1.28 Mg ha<sup>-1</sup> yr<sup>-1</sup>).</p>

scholarly journals A Comparative Analysis of Soil Loss Tolerance and Productivity of the Olive Groves in the Protected Designation of Origin (PDO) Areas Norte Alentejano (Portugal) and Estepa (Andalusia, Spain)

Agronomy ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 665
Author(s):  
Antonio Alberto Rodríguez Sousa ◽  
José Muñoz-Rojas ◽  
Teresa Pinto-Correia ◽  
Pedro A. Aguilera ◽  
Jesús M. Barandica ◽  
...  
Keyword(s):  
Soil Loss ◽  
Agricultural Practices ◽  
Productivity Index ◽  
Soil Productivity ◽  
Tolerance Index ◽  
Protected Designation Of Origin ◽  
Olive Groves ◽  
Soil Loss Tolerance ◽  
Loss Tolerance ◽  
Mediterranean Systems

Olive groves are Mediterranean systems that occupy more than 2.5 M ha in Spain and 0.352 M ha in Portugal. Assuming the differences between both countries in terms of olive grove regulation and considering their multifunctionality, it is useful to implement agronomic indices to estimate their sustainability. The Soil Loss Tolerance Index (SLTI) and the Soil Productivity Index (SPI) are two such indices. We calculated both indices in the Protected Designation of Origin (PDO) Norte Alentejano (Portugal). The SLTI index was adapted considering specific variables of the analysed olive groves (i.e., SLTIog). The values obtained were compared with those previously estimated for PDO Estepa (Spain). The negative impacts of erosion and the underlying agricultural practices on the sustainability of olive groves became evident, resulting in decreased soil productivity at the regional level. The SLTIog index showed higher values for crops, being a more realistic tool to analyse sustainability. A higher soil loss tolerance was detected for integrated groves in the PDO Norte Alentejano than for PDO Estepa due to the shorter age of olive cultivation in Portugal, with incipient soil impacts. These indices provide information on the degree of soil erosion, allowing farmers and decision-makers to apply practices to maximise the sustainability of olive groves.

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.

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