Effects of different vegetation restoration measures on soil aggregate stability and erodibility on the Loess Plateau, China
Dou Yan xing1,3; Yang Yang2; An Shao Shan1
2020-02
Source PublicationCatena
Issue185Pages:104294
Abstract

A B S T R A C T

Vegetation restoration may affect soil aggregate stability and the ability of soil to resist erosion. To evaluate the influence of vegetation restoration measures on the stability of soil aggregate and soil erodibility, we chose 7 types of vegetation restoration measures, which included artificial forest (AF), artificial mixed forest (AMF), economic forest (EF), artificial shrub (AS), natural shrub (NS), artificial grass (AG) and natural grass (NG). Then, we analyzed the distribution of water-stable aggregate fractions, mean weight diameter (MWD), geometric mean diameter (GMD), soil erodibility (K value) and other soil properties in the 0–20cm and 20–40cm soil layers, as well as aboveground and underground biomass (AGB and UGB). The results showed that under 7 kinds of vegetation restoration measures, the aggregate fraction<0.25mm was the main component (40.40–77.86%) and the proportion of the>5mm aggregates fluctuated greatly and ranged from 1.87% to 32.50%. And for 7 different vegetation restoration measures, the percentage of aggregate<0.25mm was lower than that of CK (abandoned land), however, the proportion of aggregate>5mm was higher than the CK. Overall, compared with CK, the MWD (2.22 and 1.93mm) and GMD (2.86 and 2.66mm) were both highest in two soil layers under the NS but lowest under the EF (MWD 0.68 and 0.49mm, GMD 1.08 and 0.93mm). The trend of the K value was opposite to these values. These results indicated that the stability of soil aggregate and the ability of soil to resist erosion under NS were strongest. The soil organic carbon (SOC), total nitrogen (TN) and UGB had significantly positive correlations with the proportion of>1mm aggregates and MWD but had negative correlations with the percentage of<0.25mm aggregates (p < 0.05), which indicated that SOC, TN and UGB were involved in the formation of macroaggregates and increased the stability of soil aggregates. These results suggested that natural shrub restoration measures could improve the soil aggregate stability and ability to resist erosion better than forest and grass restoration measures, which can provide a reference for the assessment of vegetation restoration measures.

KeywordSoil aggregate stability Loess Plateau Soil erodibility Vegetation restoration measures
Indexed BySCI
Publication PlaceGermany
Language英语
Document Type期刊论文
Identifierhttp://ir.iswc.ac.cn/handle/361005/9212
Collection水保所2018--2020届毕业生论文(学位论文、期刊论文)
Corresponding AuthorAn Shao Shan
Affiliation1.State Key Laboratory of Soil Erosion and Dry Land Farming on the Loess Plateau, Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Yangling, Shaanxi 712100, PR China
2.College of Resource and Environment, Northwest Agriculture & Forest University, Yangling, Shaanxi 712100, PR China
3.University of Chinese Academy of Sciences, Beijing 100049, PR China
Recommended Citation
GB/T 7714
Dou Yan xing,Yang Yang,An Shao Shan. Effects of different vegetation restoration measures on soil aggregate stability and erodibility on the Loess Plateau, China[J]. Catena,2020(185):104294.
APA Dou Yan xing,Yang Yang,&An Shao Shan.(2020).Effects of different vegetation restoration measures on soil aggregate stability and erodibility on the Loess Plateau, China.Catena(185),104294.
MLA Dou Yan xing,et al."Effects of different vegetation restoration measures on soil aggregate stability and erodibility on the Loess Plateau, China".Catena .185(2020):104294.
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