Effects of land use types on soil erodibility in a small karst watershed in western Hubei

Luo, Ting; Liu, Wenjing; Dong, Xinyong; Xia, Lu; Guo, Ting; Ma, Yueyang; Xu, Wennian; Hu, Yue

doi:10.7717/peerj.14423

Cited by 3 publications

(4 citation statements)

References 55 publications

(50 reference statements)

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“…In karst areas, the EPIC model is often used to assess soil erodibility. For example, Luo et al (2022) [50] utilised the EPIC model to evaluate soil erodibility in karst areas, with an evaluation range of 0.0436-0.0520. The K value of vegetable fields and terraces is the highest, while that of natural mixed forests is the lowest.…”

Section: Effects Of the Pattern Of Land Use On The Soil Erodibilitymentioning

confidence: 99%

Response of the Stability of Soil Aggregates and Erodibility to Land Use Patterns in Wetland Ecosystems of Karst Plateau

Cen,

Peng,

Dai

2024

Forests

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The world’s natural wetlands, which have important ecological functions, are being lost at an alarming rate. The erosion and deposition of soil on wetlands is a major cause of wetland conversion to agriculture. An urgent problem to be solved is how to slow down the erosion and deposition of wetlands resulting from land use. Land use patterns affect soil properties, thereby affecting soil aggregate stability and erodibility. Evaluating the effects of land use patterns on soil aggregate stability and erodibility in small watersheds of wetland ecosystems of karst plateau is of great importance. Thus, we compared the soil properties, aggregate stability indicators and soil erodibility of shrubland, grassland, artificial forest land and sloping farmland for evaluating the impact of various land use patterns on soil aggregate stability and erodibility in typical karst plateau wetland ecosystems. Our results showed that the mass fraction of soil aggregates > 0.25 mm was the main component in the four land uses, with greater variation in aggregates > 5 mm; overall, MWD, GMD and WSA0.25 were higher in grassland and shrubland than in sloping farmland and artificial forest land, while K values, PAD and SCAI showed the opposite trend. Correlation analysis showed that effective soil nutrients had a positive effect on soil aggregate stability. In conclusion, the stability of soil aggregates and resistance to soil erosion were strongest under the influence of shrubland. Our study showed that shrubland can better improve soil aggregate stability and erosion resistance, which may provide a guide for protecting and restoring karst plateau wetland ecosystems.

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Section: Effects Of the Pattern Of Land Use On The Soil Erodibilitymentioning

confidence: 99%

Response of the Stability of Soil Aggregates and Erodibility to Land Use Patterns in Wetland Ecosystems of Karst Plateau

Cen,

Peng,

Dai

2024

Forests

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“…Data (Luo, 2023) are available from the Science Data Bank: https://doi.org/10.57760/sciencedb.13262.…”

Section: Data Availability Statementmentioning

confidence: 99%

“…As a small primary tributary at the boundary between the upper and middle reaches of the Yangtze River, Xialaoxi is a typical small watershed of the Yangtze River in western Hubei. Coupled with its karst landscape environment, which has poor soil structural stability and nutrient loss (Liu et al, 2021), the overall management of soils in the watershed is of great importance for the conservation of the Yangtze River (Li et al, 2008). In addition, the need to develop the economy and natural resources forces land use development in the watershed, and how to build a healthy ecosystem to meet economic sustainability also seems crucial.…”

Section: Introductionmentioning

confidence: 99%

Impact of typical land use type on the stability and content of carbon and nitrogen of soil aggregates in western Hubei

Luo,

Xia,

Xia

et al. 2023

Ecosphere

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In order to investigate the characteristics of soil structural stability and the factors influencing it under typical land use types in the karst region of western Hubei, soil samples were collected from five land use types (natural mixed forest [NF], cypress forest [CF], stone dike terrace [ST], stone dike forest [SF], and abandoned land [AL]) in Xialaoxi to analyze the particle size distribution of aggregates, structural stability, and the distribution characteristics of carbon, nitrogen, and extracellular enzyme contents. The results showed that the aggregates of NF, CF, SF, and AL were dominated by >2‐mm aggregates, while ST showed mostly 2–0.25‐mm aggregates. The mean weight diameter (EMWD) and the geometric mean diameter (EGMD) of mechanical aggregates showed a trend of CF > NF > SF > AL > ST, whereas the erodibility factor K showed an opposite trend. The total organic carbon (TOC), labile organic carbon (LOC), and total nitrogen (TN) contents of aggregates of each particle size were significantly higher in NF and CF than in ST and AL under the five land types. The content of available nitrogen (AN) was highest in NF and ST. The content of carbon and nitrogen and extracellular hydrolases (β‐glucosidase [BG], cellulose disaccharide hydrolase [CBH], β‐N‐acetyl‐aminoglucosidase [NAG], and leucine aminopeptidase [LAP]) in soil aggregates were mainly concentrated in <0.25–0.053‐mm aggregates. The variation in carbon and nitrogen abundance of each particle size agglomerate mainly originated from the LAP content of that particle size agglomerate and showed significant correlation. The partial least squares path models (PLS‐PM) showed that the main influences on the stability of soil aggregates in small watersheds were land use types, soil physical properties, carbon and nitrogen abundance, and extracellular enzyme activity. In conclusion, the structural stability of soil aggregates in Xialaoxi watershed is the result of the interaction between human disturbance and soil nutrient self‐cycling. In general, NF and CF have better soil aggregate stability and are conducive to soil carbon and nitrogen accumulation, whereas for later development and management of SF, ST, and AL sample plots, scientific cultivation means should be adopted, and attention should be paid to long‐term carbon and nitrogen accumulation and conservation.

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“…Beah et al (2020) used the RothC and APSIM models to investigate grassland's effect on soil organic carbon storage in the arid region of southern Iran and the impact of nitrogen fertilizer application on corn yield, respectively. There are also other models that can be used to simulate other biogeochemical processes such as T. Luo et al (2022) The DNDC model has the capacity to model complex processes in agricultural ecosystems, estimate dynamic changes in soil carbon and nitrogen, and predict crop yield in various ecosystems. It can be combined with GIS technology for large-scale regional simulations, making it valuable for long-term fixed-point observation data integration and predictions.…”

Section: Introductionmentioning

confidence: 99%

A review and outlook on the development and application of the DNDC model

Gong,

Wang,

Zhang

et al. 2023

Preprint

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Denitrification-Decomposition (DNDC) model, a mathematical construct that simulates biogeochemical processes including carbon and nitrogen dynamics, plant growth, and microbial activity across various ecosystems. The discourse includes an examination of the model’s developmental trajectory, with attention given to adaptations created for diverse ecosystems, regions, specific crops, and modular configurations. We additionally delve into the validation processes of the DNDC model and its broader applications across different fields. Despite the model’s extensive usage in previous studies, there has been a lack of critical, comprehensive evaluation of its merits and demerits. This paper aim to address this gap, providing a thorough critique and review of the DNDC model. In our discussion, we present a balanced overview of the DNDC model’s current strengths and weaknesses, and offer insights into its potential future developments. The ultimate goal of this paper is twofold. Firstly, we aim to provide guidance to researchers and practitioners who are either currently employing or considering the use of the DNDC model. Secondly, our critique and analysis is intended to be a constructive contribution towards the model’s future refinement and development.

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Effects of land use types on soil erodibility in a small karst watershed in western Hubei

Cited by 3 publications

References 55 publications

Response of the Stability of Soil Aggregates and Erodibility to Land Use Patterns in Wetland Ecosystems of Karst Plateau

Response of the Stability of Soil Aggregates and Erodibility to Land Use Patterns in Wetland Ecosystems of Karst Plateau

Impact of typical land use type on the stability and content of carbon and nitrogen of soil aggregates in western Hubei

A review and outlook on the development and application of the DNDC model

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