Restoration Measures Supported Surface Soil
Carbon and Nitrogen Density in Alpine Grassland
of Sanjiangyuan Region, China

Chen, Dongdong; Qi, Li; FuQuan, He; Chen, Xin; Xu, Shan; Zhao, Xinquan; Li, Jingmei; Liu, Lihua; Zhao, Liang

doi:10.15244/pjoes/114417

Cited by 5 publications

(4 citation statements)

References 22 publications

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“…Pearson's correlation was used to detect the relationships between forage yield, quality, altitude, and environmental factors. Redundancy analysis (RDA, which was computed using the "vegan" library (Oksanen et al 2015) of the R statistical language (R Core Team 2015) was used to screen the main influencing factors of forage nutrients.…”

Section: Discussionmentioning

confidence: 99%

“…The BD and water content (water) were determined by drying method, soil pH was determined in 1:2.5 (w/v) soil/ KCl extracts using a combination glass electrode, and SIN was determined in 2 M KCl extracts with a Skalar San++ continuous flow analyzer (Skalar Analytical, Breda, Netherlands), total nitrogen (TN) by Kjeldahl N analyzer, soil organic carbon (SOC) by potassium dichromate-concentrated sulfuric acid oxidation, and total phosphorus (TP) by molybdenum-antimony anti-spectrophotometric method (Chen et al 2020). And the density calculation of C, N, and P was described by Chen et al (2020).…”

Section: Determination Of Forage Nutrients and Soil Physiochemical Inmentioning

confidence: 99%

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Variations of Forage Yield and Nutrients with Altitude Gradients and Their Influencing Factors in Alpine Meadow of Sanjiangyuan, China

Chen

Liu

et al. 2020

J Soil Sci Plant Nutr

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This study aimed to investigate the forage yield and quality and extract factors affecting them and provide scientific support for ecological protection of alpine grassland and sustainable development of animal husbandry in the Qinghai-Tibetan Plateau. Samples were collected in late August (peak of the growing season) 2014 in two mountain transects (Laji mountain, 36°21′ N, 101°27′ E, 3389-3876 m a.s.l. and Heitu mountain, 34°22′ N, 100°30′ E, 4121-4268 m a.s.l.) of Sanjiangyuan. Forage biomass and nutrients were measured by the national standard method, and influencing factors were extracted by RDA. Results showed that the forage yield decreased significantly with the increasing altitude, no matter in the mountain > 4000 m a.s.l. or < 4000 m a.s.l. Forage yield was more affected by environmental factors in low altitude areas, but less in high-altitude areas. Forage nutrients were mainly affected by altitude and soil organic carbon (SOC) (p < 0.01) on the mountain < 4000 m a.s.l., while on the mountain > 4000 m a.s.l., fiber and lignin were mainly affected by soil pH and SOC and crude protein (CP) by soil pH (p < 0.05) and total phosphorus (TP). Overall, with the increasing altitude, forage CP and fat (CF) increased, while neutral detergent fiber and acid detergent fiber decreased, implying that warming may lead to the decline of forage quality and then affect the safety of animal husbandry. Moreover, forage CP and CF were also affected by soil inorganic nitrogen and TP rather than SOC and soil total nitrogen.

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Section: Discussionmentioning

confidence: 99%

Section: Determination Of Forage Nutrients and Soil Physiochemical Inmentioning

confidence: 99%

Variations of Forage Yield and Nutrients with Altitude Gradients and Their Influencing Factors in Alpine Meadow of Sanjiangyuan, China

Chen

Liu

et al. 2020

J Soil Sci Plant Nutr

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“…A wide consensus has been reached on the ability of vegetation restoration in improving the physiochemical structure of soil, thereby enhancing SOC accumulation (Li et al 2017, 2019 b , 2019 a ). However, studies on vegetation restoration efforts that have been implemented in the Zoige grassland have largely focused on the changes in SOC content (Chen et al 2016; Wang et al 2016; Zhong et al 2017), leaving the patterns linked to SOC stability largely unclear. Therefore, in this study, we aimed to (1) investigate the effects of vegetation restoration on SOC and its fractions, (2) analyze the effects of vegetation restoration on soil aggregates and their associated SOC contents, and (3) elucidate the factors that impact the effectiveness of vegetation restoration in maintaining SOC stability.…”

Section: Introductionmentioning

confidence: 99%

Soil organic carbon and its stability after vegetation restoration in Zoige grassland, eastern Qinghai‐Tibet Plateau

Zhao

et al. 2023

Restoration Ecology

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Soil organic carbon (SOC) shapes carbon cycling and climate. Grassland degradation has greatly reduced the SOC of these biomes. However, vegetation restoration is effective at improving the SOC of degraded grasslands, the sustainability of the outcomes of which is unclear. Therefore, we studied the effects of vegetation restoration on SOC and its stability in perspective of three restoration practices (i.e. Hippophae rhamnoides Linn., Elymus nutans Griseb., Avena nuda, and their combinations) in Zoige, a climatically sensitive area located at the eastern Qinghai‐Tibet Plateau. Topsoil samples (0–10 cm) were collected within each restoration practice to analyze SOC and its fraction contents, soil aggregates, and aggregate‐associated SOC content. Results showed that SOC in the control (CK) was 2.77 g kg−1, and vegetation restoration increased the SOC contents by 10.12, 73.00, and 15.81%, respectively. Vegetation restoration significantly increased the easily oxidizable carbon (EOC) and decreased recalcitrant organic carbon (ROC), highlighting different responses of SOC fractions to vegetation restoration. Soil macroaggregate was 8.74% in CK, which was significantly lower than that after vegetation restoration (57.08–81.01%). Vegetation restoration had no impact on non‐aggregated silt + clay fraction‐associated SOC and significantly increased macroaggregate‐associated SOC content, which was the major contributor of total SOC. These findings suggest that vegetation restoration may affect SOC stability by increasing SOC and EOC, decreasing ROC, and changing the compositions of aggregates and aggregate‐associated SOC. However, our study was conducted 3 years after vegetation restoration, which maybe too short of a period to accurately determine SOC stability.

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“…As its main ecosystem, grassland is a unique ecosystem formed by long-term evolution and development under the unique climate, geography, geology, and other environmental conditions of the QTP [13]. There are few studies on the spatial distribution of soil nutrients and their stoichiometry in SJY [7,[14][15], and limited work has mainly focused on the effects of altitude, grazing intensity, and land use on soil organic matter, enzyme activities, and heavy metals [16][17][18][19][20]. Caused by the difference in hydrothermal conditions and biomass productivity and quality allocation patterns [21][22], and the difference in grassland utilization in different regions caused by human interference [23][24] in SJY, the soil input of organic matter from vegetation [25] and nutrients from herbivore excreta [26] are affected.…”

Section: Introductionmentioning

confidence: 99%

Density and Stoichiometric Characteristics of Carbon, Nitrogen, and Phosphorus in Surface Soil of Alpine Grassland in Sanjiangyuan

Chen¹,

Li²,

Li³

et al. 2022

Pol. J. Environ. Stud.

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The balance and stoichiometry of carbon (C), nitrogen (N), and phosphorus (P) can reflect the quality and content of organic matter and is very important for understanding ecological processes and ecosystem response to climate change and disturbance. To explore the spatial distribution characteristics of C, N, P, and their stoichiometry of topsoil in Sanjiangyuan (SJY), we sampled 0-20 cm soil of alpine grassland in SJY, measured soil C, N, and P, and analyzed their correlation with latitude, longitude, altitude, and vegetation characteristics (diversity, height, coverage, biomass, etc.). The results showed that the average densities of soil organic C (SOC), total N (TN), total P (TP), and soil inorganic C (SIC) in SJY were 7.56 kg•m -2 , 0.71 kg•m -2 , 151.57 g•m -2 , and 1.77 kg•m -2 , respectively. The spatial distribution of SOC, TN, and TP in SJY showed a pattern of high in the east and low in the west, while SIC showed the opposite pattern. The heterogeneity of soil TP in the SJY region was small, which indicated that there may be little difference in soil parent materials in the whole region. The soil nutrients were mainly affected by longitude, soil water content, pH, and vegetation height and coverage. The C: N: P ratio of the 0-20 cm soil in the study area was approximately 48:5:1, and the C: N, C: P, and N: P ratios were significantly affected by soil water content and vegetation height. Soil C: N ratio (10.45) and N:P ratio (4.51) were lower than the national level, which indicated that the soil N mineralization capacity of SJY was higher than that of other regions in China, and the degree of soil N limit was small.

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Restoration Measures Supported Surface Soil Carbon and Nitrogen Density in Alpine Grassland of Sanjiangyuan Region, China

Cited by 5 publications

References 22 publications

Variations of Forage Yield and Nutrients with Altitude Gradients and Their Influencing Factors in Alpine Meadow of Sanjiangyuan, China

Variations of Forage Yield and Nutrients with Altitude Gradients and Their Influencing Factors in Alpine Meadow of Sanjiangyuan, China

Soil organic carbon and its stability after vegetation restoration in Zoige grassland, eastern Qinghai‐Tibet Plateau

Density and Stoichiometric Characteristics of Carbon, Nitrogen, and Phosphorus in Surface Soil of Alpine Grassland in Sanjiangyuan

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