Soil nitrogen and phosphorus stoichiometry in a degradation series of<i>Kobresia humulis</i>meadows in the Tibetan Plateau

Li, 林丽 Lin; Yikang, 李以康 Li; Fawei, 张法伟 Zhang; Yangong, 杜岩功 Du; Xiaowei, 郭小伟 Guo; Jing, 李婧 Li; Shuli, 刘淑丽 Liu; Guangmin, 曹广民 Cao

doi:10.5846/stxb201205310797

Cited by 10 publications

(4 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…After implementing the fencing enclosure, the species composition has gradually changed, especially the appearance of Kobresia pygmaea C. B. Clarke. Some studies found that Kobresia pygmaea C. B. Clarke could be used as a characterization of grassland degradation [76,77]. In FE11, an increasing proportion of Kobresia pygmaea C. B. Clarke was observed, indicating that the fencing grassland is gradually becoming healthy and the level of degradation is reducing.…”

Section: The Impact Of the Fencing Enclosure On Soil Propertiesmentioning

confidence: 99%

Assessment of the Effects of Fencing Enclosure on Soil Quality Based on Minimum Data Set in Biru County of the Qinghai–Tibet Plateau, China

et al. 2023

View full text Add to dashboard Cite

Fencing enclosures play an important role in improving ecological quality. There is a direct impact of implementing fencing enclosures on the change in soil quality. The soil quality index was used to examine the effects of fencing enclosures for different years (7 and 11 years) on soil quality in Biru County of Qinghai–Tibet Plateau, China. The fencing enclosure significantly increased soil water content, non-capillary porosity, soil organic matter, total nitrogen, total phosphorus, and alkali-hydrolyzable nitrogen, and significantly decreased the soil bulk density. The soil quality gradually improved as the fencing enclosure time length increased, probably due to the increase of vegetation coverage and biomass under the fencing enclosure. The minimum data set was composed of soil organic matter, capillary porosity, total potassium, and non-capillary porosity. The minimum data set was significantly correlated with the total data set and could replace the total data set for soil quality evaluation in the fencing enclosure project area. In summary, our study reflects that fencing enclosures significantly improve soil quality, and the implementation of the fencing enclosure project will effectively curb land degradation in Biru County of the Qinghai–Tibet Plateau, China.

show abstract

Section: The Impact Of the Fencing Enclosure On Soil Propertiesmentioning

confidence: 99%

Assessment of the Effects of Fencing Enclosure on Soil Quality Based on Minimum Data Set in Biru County of the Qinghai–Tibet Plateau, China

et al. 2023

View full text Add to dashboard Cite

show abstract

“…The path coefficient between the plant community and soil nutrients was high. According to Liebig's minimum law, PFGs whose growth is sensitive to resource availability will be limited under limiting resources (Lin et al, 2010). Lin (2017) reported that the current characteristics of alpine meadows in the QTP are determined by the groups insensitive to over‐grazing, and the Poaceae PFG was sensitive to grazing intensity, which resulted in this PFG being reduced in the community under overgrazing conditions.…”

Section: Discussionmentioning

confidence: 99%

“…The plant community structure had the highest path coefficient with soil OM and NO 3 − , which can be considered as nutrient reservoirs or limited resources in northern ecosystems (Miehe, Kerstin, et al, 2011; Y. Wang et al, 2021). Previous studies showed that K. pygmaea has a low aboveground biomass production but a high belowground biomass production, and that the root biomass is positively related to soil OM accumulation (Lin et al, 2010). Therefore, the plant community structure and yield changes might exert a positive feedback by soil nutrient content and accumulation (Lin et al, 2010).…”

Section: Discussionmentioning

confidence: 99%

“…Previous studies showed that K. pygmaea has a low aboveground biomass production but a high belowground biomass production, and that the root biomass is positively related to soil OM accumulation (Lin et al, 2010). Therefore, the plant community structure and yield changes might exert a positive feedback by soil nutrient content and accumulation (Lin et al, 2010).…”

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Self‐stabilizing maintenance process in plant communities of alpine meadows under different grazing intensities

Lin

Cao

et al. 2023

Grassland Research

View full text Add to dashboard Cite

Backgrounds: Grazing prohibition and reduced grazing intensity, as two important "vegetation close-to-nature recovery" methods, have been suggested as economical and effective technologies for enhancing forage production. However, numerous studies have found that the yield of forage could be increased by removing or reducing grazing in a short time in some steady stage of alpine Kobresia meadows, but not in others. To reveal the mechanism behind this phenomenon, we proposed a series of experiments. Methods: We monitored the plant and soil characteristics in the key steady stages of Kobresia meadows under reduced and prohibited grazing conditions in the same geographic and climatic environments in the northeastern Qinghai-Tibet Plateau for 6 years. We estimated the relationships between the plant community and soil nutrients and obtained the following results. Results: All measured variables were positively correlated with each other. The plant community structure had higher path coefficients to aboveground biomass, soil organic matter, total nitrogen, and nitrate nitrogen than to other factors. The plant community structure played an important role in response to grazing intensity. Different plant functional groups (PFGs) had different responses to grazing intensity, which led to plant community re-establishment or re-organization under different grazing intensities. Poaceae and Kobresia were more sensitive to grazing intensity than other PFGs, and the ratio of Kobresia biomass (including Kobresia humilis and Kobresia pygmaea) to the total biomass of Poaceae and Kobresia could be used as an indicator of regime shifts within plant communities. With Kobresia pygmaea as the dominant species, the prohibition of grazing was not an efficient approach to increase the yield in the steady stages because this treatment needed more time to recover aboveground biomass. If Poaceae is the dominant PFG, grazing should only be prohibited for 3 years in the steady stages because the aboveground biomass will decrease if grazing is prohibited for more than 3 years. Conclusions: Therefore, the different steady stages of alpine meadows require different recovery methods to increase recovery efficiency and speed.

show abstract

The evolution of hummock–depression micro‐topography in an alpine marshy wetland in Sanjiangyuan as inferred from vegetation and soil characteristics

Gao

2021

Ecology and Evolution

View full text Add to dashboard Cite

show abstract

Soil nitrogen and phosphorus stoichiometry in a degradation series ofKobresia humulismeadows in the Tibetan Plateau

Cited by 10 publications

References 0 publications

Assessment of the Effects of Fencing Enclosure on Soil Quality Based on Minimum Data Set in Biru County of the Qinghai–Tibet Plateau, China

Assessment of the Effects of Fencing Enclosure on Soil Quality Based on Minimum Data Set in Biru County of the Qinghai–Tibet Plateau, China

Self‐stabilizing maintenance process in plant communities of alpine meadows under different grazing intensities

The evolution of hummock–depression micro‐topography in an alpine marshy wetland in Sanjiangyuan as inferred from vegetation and soil characteristics

Contact Info

Product

Resources

About