Grazing effects on eco-stoichiometry of plant and soil in Hulunbeir, Inner Mogolia

Xiaohui, 丁小慧 Ding; Li, 宫立 Gong; Dongbo, 王东波 Wang; Xing, 伍星 Wu; Guohua, 刘国华 Liu

doi:10.5846/stxb201104200523

Cited by 8 publications

(2 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Plant C concentration significantly reduced with grazing intensity in this study, while previous studies found plant C concentration had no significant response to grazing intensity (Ding, Gong, Wang, Wu, & Liu, 2012;Liang et al, 2019). Grazing intensity is a critical factor to regulate plant C dynamic (He et al, 2019).…”

Section: Effect Of Grazing On Plant C N and Pcontrasting

confidence: 67%

Asymmetric effects of grazing intensity on macroelements and microelements in grassland soil and plants in Inner Mongolia Grazing alters nutrient dynamics of grasslands

Hou

Guo

Changcheng

2020

Ecology and Evolution

View full text Add to dashboard Cite

Grazing is a traditional grassland management technique and greatly alters ecosystem nutrient cycling. The effects of grazing intensity on the nutrient dynamics of soil and plants in grassland ecosystems remain uncertain, especially among microelements. A 2‐year field grazing experiment was conducted in a typical grassland with four grazing intensities (ungrazed control, light, moderate, and heavy grazing) in Inner Mongolia, China. Nutrient concentration was assessed in soil and three dominant plant species (Stipa krylovii, Leymus chinensis, and Cleistogenes squarrosa). Assessed quantities included four macroelements (carbon (C), nitrogen (N), phosphorus (P), and magnesium (Mg)) and four microelements (copper (Cu), iron (Fe), manganese (Mn), and zinc (Zn)). Soil total C, total N, total P, available N, and available P concentrations significantly increased with grazing intensity but soil Mg, Cu, Fe, Mn, Zn concentrations had no significant response. Plant C concentration decreased but plant N, P, Mg, Cu, Fe, Mn, and Zn concentrations significantly increased with grazing intensity. In soil, macroelement dynamics (i.e., C, N, and P) exhibited higher sensitivity with grazing intensity, conversely in plants, microelements were more sensitive. This result indicates macroelements and microelements in soil and plants had asymmetric responses with grazing intensity. The slopes of nutrient linear regression in C. squarrosa were higher than that of S. krylovii and L. chinensis, indicating that C. squarrosa had higher nutrient acquisition capacity and responded more rapidly to heavy grazing. These findings indicate that short‐term heavy grazing accelerates nutrient cycling of the soil–plant system in grassland ecosystems, elucidate the multiple nutrient dynamics of soil and plants with grazing intensity, and emphasize the important function of microelements in plant adaptation in grazing management.

show abstract

Section: Effect Of Grazing On Plant C N and Pcontrasting

confidence: 67%

Asymmetric effects of grazing intensity on macroelements and microelements in grassland soil and plants in Inner Mongolia Grazing alters nutrient dynamics of grasslands

Hou

Guo

Changcheng

2020

Ecology and Evolution

View full text Add to dashboard Cite

show abstract

“…The three element ratios (C/N, C/P and N/P) in S. krylovii were highest among four species, and it is mainly because N and P concentrations in S. krylovii were the lowest. It is known that when plant C/N ratio becomes small, the decomposition rate of the residue becomes faster [62]. Due to the input of large amounts of high quality aboveground litter (high N%) without livestock disturbance, low C/N ratio may help S. chamaejasme to create islands of fertility.…”

Section: Discussionmentioning

confidence: 99%

High nutrient uptake efficiency and high water use efficiency facilitate the spread of Stellera chamaejasme L. in degraded grasslands

Guo

Liu

et al. 2019

BMC Ecol

View full text Add to dashboard Cite

BackgroundStellera chamaejasme L. is a poisonous plant widely distributes in degraded grasslands in China. The mechanism underlying its spread remains unknown. In some degraded grasslands, S. chamaejasme has gradually replaced previous dominant species, such as Leymus chinensis, Stipa krylovii, Artemisia eriopoda on typical steppes. Apart from its unpalatability by livestock, we hypothesized that the survival strategy (nutrient uptake and water use efficiency) of S. chamaejasme in degraded grasslands could be distinct from other coexisting species in the community. Recently, ecological stoichiometry has been suggested as a new approach for studying the demand for natural resources of plants in a changing world, and the leaf carbon isotopic composition (δ13C leaf) as a rapid and effective high throughput phenotyping method for water use efficiency (WUE), both of which can reveal the survival and adaptive strategies of plants. Therefore, in this study we aimed to fill the knowledge gap concerning ecological stoichiometry in the leaf, stem, and root of S. chamaejasme and its surrounding soil on grasslands with different degrees of degradation, and comparing the leaf nutrient content and δ13C of S. chamaejasme with the coexisting species (L. chinensis, S. krylovii, A. eriopoda) in the communities. Toward this goal, we conducted a field survey in which plants and soils were sampled from four different degraded grasslands on typical steppes in China.ResultsOur results showed that there is no significant difference of carbon content (C%) and nitrogen content (N%) in leaves of S. chamaejasme in different degraded grasslands, and all element contents and element ratios in stems did not differ significantly. Meanwhile, ecological stoichiometry of S. chamaejasme is distinct from the coexisting species, with low C%, high N% and phosphorus content (P%) in the leaf, indicating high nutrient uptake efficiency of S. chamaejasme in nutrient-poor environments like degraded grasslands. Additionally, S. chamaejasme showed significant higher WUE than other species.ConclusionsOur results indicated that high nutrient uptake efficiency and high WUE of S. chamaejasme might together contribute to the spread of S. chamaejasme in degraded grasslands.

show abstract

Landscape-scale spatial variability of soil organic carbon content in a temperate grassland: Insights into the role of wind erosion

Zou

Zhang

Zhou

et al. 2021

CATENA

View full text Add to dashboard Cite

Grazing effects on eco-stoichiometry of plant and soil in Hulunbeir, Inner Mogolia

Cited by 8 publications

References 4 publications

Asymmetric effects of grazing intensity on macroelements and microelements in grassland soil and plants in Inner Mongolia Grazing alters nutrient dynamics of grasslands

Asymmetric effects of grazing intensity on macroelements and microelements in grassland soil and plants in Inner Mongolia Grazing alters nutrient dynamics of grasslands

High nutrient uptake efficiency and high water use efficiency facilitate the spread of Stellera chamaejasme L. in degraded grasslands

Landscape-scale spatial variability of soil organic carbon content in a temperate grassland: Insights into the role of wind erosion

Contact Info

Product

Resources

About