The linkage between vegetation and soil nutrients and their variation under different grazing intensities in an alpine meadow on the eastern Qinghai-Tibetan Plateau

Yang, Zi; Zhu, Qiuan; Zhan, Wei; Xu, Yuchun; E, Zhu; Gao, Yongheng; Li, Shiqing; Zheng, Qunying; Zhu, Dan; He, Yixin; Peng, Changhui; Chen, Huai

doi:10.1016/j.ecoleng.2017.11.001

Cited by 57 publications

(64 citation statements)

References 57 publications

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“…The RS was defined as that soil adhering to the roots, which was obtained by carefully shaking the plants free from loose soil. The soil not tightly adhering to the roots was the BS [6,27]. The plants collected with the soil samples were cut at the collar to separate the aboveground shoots and the belowground roots.…”

Section: Sampling and Chemical Measurementmentioning

confidence: 99%

“…Additionally, the changes in species composition under high grazing intensities can also affect the availability of nutrients. For example, grazing can increase the number of forbs, which can absorb more N than graminoids [6,30]. In addition, unpalatable and grazing-tolerant annual species become dominant under heavy grazing pressure, and those species usually have higher nutrient contents with lower leaf C:N ratios than perennial grass species [6,8,13,30].…”

Section: Effects Of Grazing On Stoichiometric Characteristics Of Plantsmentioning

confidence: 99%

“…As the most prevalent land-use type, livestock grazing is related to the sustainable use of grassland ecosystems, because grassland degradation primarily results from imbalances in energy flow and material cycles due to overgrazing. Overgrazing not only threatens the biodiversity and stability of grassland ecosystems but also results in dramatic shifts in their original structural and functional characteristics [4][5][6][7]. Although the effects of grazing on the structure and function of grassland ecosystems have been investigated in many studies, the understanding of the mechanisms underlying the responses of grasslands to grazing remains limited.…”

Section: Introductionmentioning

confidence: 99%

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Grazing Affects the Ecological Stoichiometry of the Plant–Soil–Microbe System on the Hulunber Steppe, China

et al. 2019

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Grazing affects nutrient cycling processes in grasslands, but little is known by researchers about effects on the nutrient stoichiometry of plant–soil–microbe systems. In this study, the influence of grazing intensity (0, 0.23, 0.34, 0.46, 0.69, and 0.92 AU ha−1) on carbon (C), nitrogen (N) and phosphorus (P) and their stoichiometric ratios in plants, soil, and microbes was investigated in a Hulunber meadow steppe, Northeastern China. The C:N and C:P ratios of shoots decreased with grazing increased. Leaf N:P ratios <10 suggested that the plant communities under grazing were N-limited. Heavy grazing intensities increased the C:N and C:P ratios of microbial biomass, but grazing intensity had no significant effects on the stoichiometry of soil nutrients. The coupling relationship of C:N ratio in plant–soil–microbial systems was tightly significant compared to C:P ratio and N:P ratio according to the correlation results. The finding suggested grazing exacerbated the competition between plants and microorganisms for N and P nutrition by the stoichiometric changes (%) in each grazing level relative to the no grazing treatment. Therefore, for the sustainability of grasslands in Inner Mongolia, N inputs need to be increased and high grazing intensities reduced in meadow steppe ecosystems, and the grazing load should be controlled within G0.46.

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Section: Sampling and Chemical Measurementmentioning

confidence: 99%

Section: Effects Of Grazing On Stoichiometric Characteristics Of Plantsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Grazing Affects the Ecological Stoichiometry of the Plant–Soil–Microbe System on the Hulunber Steppe, China

et al. 2019

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“…P content in the sward (1.7-2.5 g kg −1 DM) obtained in the present work was similar to the average for the sward of meadows of Dynowskie Foothills SE Poland (2.1 g kg −1 DM) [7] and grass and legumes of Denmark meadows (2.5-2.7 g kg −1 DM), while lower than for meadow herbs of Denmark (3.4 g kg -1 DM) [6] and significantly higher than for mountain meadows of NE China (0.78 g kg −1 DM) [8]. Other studies have shown that P concentration in plants increases with increasing grazing intensity [39]. K content (11.5-19.8 g kg −1 DM) obtained in the study was close to the average for the sward of Dynowskie Foothills meadow communities (16.0 g kg −1 DM) [7], lower than for grasses (24.7 g kg −1 DM), legumes (24.5 g kg −1 DM) and herbs (30.5 g kg −1 DM) of Denmark meadows [6] and much higher than for the mountain meadows of NE China (3.48 g kg −1 DM) [8].…”

Section: Discussionmentioning

confidence: 99%

The Content of Macro- and Micro Minerals in the Sward of Different Types of Semi-Natural Meadows of Temperate Climate in SE Poland

2020

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Seminatural meadows are characterized by a rich botanical composition, which determines their specific type. The content of macro-and micro minerals in sward seems important for ruminant farmers. The aim of the study was to determine the content of macro-and micro minerals in the sward of selected meadow types. The study was carried out in SE Poland from May to July in the years 2010-2017. The relationship between the content of each of the studied elements (N, P, K, Mg, Fe, Mn, Cu, Zn) in soil and plants was investigated, as well as whether there were differences between the average content of elements in the sward of different types of meadows. In some types of meadows there was a correlation for K, Fe, Cu, Mg and Mn. The largest differences in the content of macro minerals in the sward were found for Mg (44%) and K (42%), and in the case of micro minerals for Mn (56%). Large differences resulted primarily from different plant species; composition forming a given meadow community and not the content of these elements in the soil. The results can be applied to the proper management of farms, especially organic ones.Available research results indicate differences in the nutrient content of the sward depending on the season of the year [8], and, in particular, on the amount of precipitation, and thus soil water content [14,15]. Therefore, the assessment of the standardized precipitation and evaporation index is important in grassland management [16]. Soil moisture is also a factor strongly determining meadow botanical composition [17], as well as its proper management [18,19].In the present study, samples were collected on all meadows in the same period under comparable weather conditions. The aim of the study was to determine the content of macro-and micro minerals in the sward of specific types of meadows in the semi-natural temperate climate of SE Poland. Materials and Methods Study AreaThe research was carried out from May to July 2010-2017 in various types of seminatural meadows of the highlands, in different conditions of habitat moisture, soil pH and richness in selected macro-and micro minerals. The research area (Figure 1) included physiographically diverse fragments of the Central Beskid Foothills and the Carpathian Foothills .8713 • E). The southern part is distinguished by the presence of uniform hills running from northwest to southeast, and their absolute heights range from 250 to 350 m above sea level. Brown, loam and luvisols are the most common soils there, alluvial soil occurs in river valleys and low peats in low basins. The length of the growing season varies from 210 to 225 days and the average annual rainfall from 700 to 800 mm. There are uplifted plains in the central and northern parts of the study area lying at an altitude of 220-250 m a.s.l. Luvisols and brown soils occur in this area, alluvial soils in river valleys, and swamps in drainage areas. The average annual rainfall is 600-700 mm and the growing season lasts 220-225 days.

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“…and global environmental problems (soil degradation, climate change, water, soil erosion, etc.) [5,6]. One main mechanism by which they do this is by changing the quantity and quality of plant biomass supplied to the soils, affecting the rate of organic matter decomposition and the activity of soil microorganism and redistributing soil carbon and nutrients within soil profiles [7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Short Term Effects of Revegetation on Labile Carbon and Available Nutrients of Sodic Soils in Northeast China

Tang

Liu

et al. 2020

Land

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In response to land degradation and the decline of farmers’ income, some low quality croplands were converted to forage or grassland in Northeast China. However, it is unclear how such land use conversions influence soil nutrients. The primary objective of this study was to investigate the influences of short term conversion of cropland to alfalfa forage, monoculture Leymus chinensis grassland, monoculture Leymus chinensis grassland for hay, and successional regrowth grassland on the labile carbon and available nutrients of saline sodic soils in northeastern China. Soil labile oxidizable carbon and three soil available nutrients (available nitrogen, available phosphorus, and available potassium) were determined at the 0–50 cm depth in the five land uses. Results showed that the treatments of alfalfa forage, monoculture grassland, monoculture grassland for hay, and successional regrowth grassland increased the soil labile oxidizable carbon contents (by 32%, 28%, 15%, and 32%, respectively) and decreased the available nitrogen contents (by 15%, 19%, 34%, and 27%, respectively) in the 0–50 cm depth compared with cropland, while the differences in the contents of available phosphorus and available potassium were less pronounced. No significant differences in stratification ratios of soil labile carbon and available nutrients, the geometric means of soil labile carbon and available nutrients, and the sum scores of soil labile carbon and available nutrients were observed among the five land use treatments except the stratification ratio of 0–10/20–30 cm for available phosphorus and the values of the sum scores of soil labile carbon and available nutrients in the 0–10 cm depth. These findings suggest that short term conversions of cropland to revegetation have limited influences on the soil labile carbon and available nutrients of sodic soils in northeastern China.

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The linkage between vegetation and soil nutrients and their variation under different grazing intensities in an alpine meadow on the eastern Qinghai-Tibetan Plateau

Cited by 57 publications

References 57 publications

Grazing Affects the Ecological Stoichiometry of the Plant–Soil–Microbe System on the Hulunber Steppe, China

Grazing Affects the Ecological Stoichiometry of the Plant–Soil–Microbe System on the Hulunber Steppe, China

The Content of Macro- and Micro Minerals in the Sward of Different Types of Semi-Natural Meadows of Temperate Climate in SE Poland

Short Term Effects of Revegetation on Labile Carbon and Available Nutrients of Sodic Soils in Northeast China

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