Newly assimilated carbon allocation in grassland communities under different grazing enclosure times

Bai, Xuejuan; Yang, Xuan; Zhang, Shumeng; An, Shaoshan

doi:10.1007/s00374-021-01549-1

Cited by 13 publications

(5 citation statements)

References 74 publications

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“…Although the compensating mechanisms showed up soon after defoliation, different allocation patterns exhibited on the different grazing intensities. However, there is another scenario exist in desert steppe, that is, compared with grazing, grassland restoration by using enclosures enhanced C allocation to shoots and increased the number of leaves (Bai et al, 2021), which was disagreed with our study. The discrepancies in results could be attributed to variations in research locations or difference in plant development stages (Kuzyakov, 2001).…”

Section: Effects Of Grazing Intensity On Plant Tissuescontrasting

confidence: 99%

“…Utilization, especially grazing intensity and land use types in grassland, significantly influenced the distribution of photosynthetic products from above-to below-ground (Bai et al, 2021;Ma et al, 2021;Zhang et al, 2022). In this study, it was observed that MG increased the transfer of newly synthesized photosynthate from the shoots to the roots.…”

Section: Effects Of Grazing Intensity On Soil Microbesmentioning

confidence: 59%

“…Grazing, which is a widespread land use practice in natural grasslands, has global significance due to its economic and ecological implications, especially in relation to C cycling processes (Zhou et al, 2005;Zhao and Squires, 2010;Goudie and Viles, 2013;Wiesmair et al, 2017). Previous studies in the past few decades have shown that livestock grazing significantly influences C assimilation and allocation in typical steppe (Liu et al, 2021b;Zhang et al, 2022;Zhao et al, 2022), desert steppe (Bai et al, 2021), subtropical grassland (Wilson et al, 2018), and alpine meadow (Hafner et al, 2012). However, the intricate dynamics of short-term C cycling and its linkages between above-and below-ground components in alpine grassland ecosystems under different grazing intensities are poorly understood.…”

Section: Introductionmentioning

confidence: 99%

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Above- and below-ground responses to grazing in alpine grasslands: insights from carbon allocation and dynamic in plant-soil-microbe system

Xiang,

Wu,

Duo

et al. 2023

Preprint

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Aims Grazing is a widely utilization of natural grasslands globally, yet the impacts of grazing intensity on the short-term carbon (C) cycling dynamics between above- and below-ground remain inadequately understood. Methods we employed an experiment to identify how these changes under grazing intensities (non-grazing, NG; moderate grazing, MG; and heavy grazing, HG), which combined with an in-situ 13C tracing between plant tissues and soil microbes in alpine grassland. Results 13C was rapidly detected in shoots, roots, soils, and microbial PLFAs after first day of pulse labeling day. Comparison to NG, the root δ13C values were significantly higher under MG than under HG during the chase period (p < 0.01). PLS-PM revealed that MG significantly enhanced the 13C allocation from shoots to roots (p < 0.05), while leading to a significant decrease in the turnover of root 13C into microbial PLFA 13C amount and 13CCr (p < 0.05), and a significant reduction in soil 13C turnover into microbial 13CCr (p < 0.05). HG significantly enhanced the turnover of soil 13C into PLFA 13C amount (p < 0.05), resulting in a significant improvement in microbial PLFA 13C amount turnover into microbial 13CCr (p < 0.05), and leading a significant decrease in root 13C turnover into microbial 13CCr (p < 0.05). Conclusions Grassland under MG maintains high C retention between shoots and roots, forming a strong negative cascading relationship with microorganisms in the rhizosphere, but HG enhances the utilization of rhizodeposits by microbes, establishing a strong positive cascade relationship.

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Section: Effects Of Grazing Intensity On Plant Tissuescontrasting

confidence: 99%

Section: Effects Of Grazing Intensity On Soil Microbesmentioning

confidence: 59%

Section: Introductionmentioning

confidence: 99%

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Above- and below-ground responses to grazing in alpine grasslands: insights from carbon allocation and dynamic in plant-soil-microbe system

Xiang,

Wu,

Duo

et al. 2023

Preprint

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“…This reduced the risks of soil nutrients loss caused by wind and water erosion (García et al, 2013; Hoffmann et al, 2008). Many studies found that the pH value was significantly decreased with long‐term grazing exclusion (Bai et al, 2021; Pei et al, 2008). This resulted in the increase in rock weathering and the release of trace elements into soil (Bowman et al, 2008).…”

Section: Discussionmentioning

confidence: 99%

Retracted: Distributions of trace elements with long‐term grazing exclusion in a semi‐arid grassland of inner Mongolia

Huang

et al. 2022

Ecology and Evolution

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We still know little about the distributions of trace elements in grassland with long‐term grazing exclusion. The contents, stocks, and proportions of iron (Fe), aluminum (Al), manganese (Mn), and boron (B) in green plant–litter–root–soil were evaluated by enclosing for 18‐, and 39 years inside the fence (F18 and F39) and grazing outside the fence (F0) in Mongolia grassland. Results showed that F18 and F39 decreased the stocks of Fe, Al, and Mn in green plant and root compared with F0 (p < .05), while increased the stocks of them in litter (p < .05). The F18 obviously increased the stocks of Fe and Mn in soil, especially B (p < .05). The stock of Fe, Al, and Mn in green plant at F39 was 28.6%, 13.9%, and 39.2% higher than that at F18. The stocks of trace elements in undecomposed litter at F39 were increased by 12.7%–52.2% compared with F18, while the stocks of them in complete decomposed litter were decreased by 32.2%–42.5%. The stocks of trace elements in soil at F39 were 9.1%–28.0% lower than that at F18, especially B (p < .05). In conclusion, the trace elements were mainly shifted from green plant and root to soil and complete decomposed litter with 18‐year grazing exclusion. The trace elements were shifted from complete decomposed litter and soil to root with 39‐year grazing exclusion compared with 18‐year grazing exclusion.

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“…Extensive studies have been carried out to investigate the effects of management measures involving, e.g., grassland type [ 23 ] and regional environment [ 24 , 25 ]. Studies have also been conducted on the attributes of the management practices, such as enclosure duration [ 26 ], grazing intensity [ 27 ] and mowing method [ 28 ]. However, systematic investigations that integrate multiple stresses using relatively long-term field experiments are still lacking.…”

Section: Introductionmentioning

confidence: 99%

Enclosure in Combination with Mowing Simultaneously Promoted Grassland Biodiversity and Biomass Productivity

Nie

et al. 2022

Plants

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Grassland is the primary land use in China, which has experienced extensive degradation in recent decades due to overexploitation. Here, we conducted field experiments to quantify the degraded grassland’s recovery rate in Northeast Inner Mongolia in response to restoration measures, including fallow + enclosure (FE) and mowing + enclosure (ME) in comparison to livestock grazing (LG), since 2005. Plant community properties were surveyed and aboveground biomass (AGB) sampled in summer 2013. Our results showed that the regional dominant species Leymus chinensis retained its dominance under FE, whereas a range of forb species gained dominance under LG. Vegetative cover was maximal under FE and minimal under LG. The least amount of vegetation development and AGB were observed under LG. However, plant diversity showed an opposite pattern, with maximal diversity under LG and minimal under FE. Statistical analysis revealed that AGB was negatively associated with plant diversity for all treatments except ME. For ME, a positive AGB-diversity relationship was characterized, suggesting that mowing intensity was a controlling factor for the AGB-diversity relationship. Overall, these results demonstrated that enclosure plus mowing represented an effective conservation measure that provided fair support to forage production and a progressive pathway to a more resilient grassland system.

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Newly assimilated carbon allocation in grassland communities under different grazing enclosure times

Cited by 13 publications

References 74 publications

Above- and below-ground responses to grazing in alpine grasslands: insights from carbon allocation and dynamic in plant-soil-microbe system

Above- and below-ground responses to grazing in alpine grasslands: insights from carbon allocation and dynamic in plant-soil-microbe system

Retracted: Distributions of trace elements with long‐term grazing exclusion in a semi‐arid grassland of inner Mongolia

Enclosure in Combination with Mowing Simultaneously Promoted Grassland Biodiversity and Biomass Productivity

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