Decoupling of plant and soil metal nutrients as affected by nitrogen addition in a meadow steppe

Xue, Feng; Wang, Ruzhen; Yu, Qiang; Cao, Yanzhuo; Zhang, Yuge; Yang, Lijuan; Dijkstra, Feike A.; Jiang, Yong

doi:10.1007/s11104-019-04217-4

Cited by 20 publications

(9 citation statements)

References 68 publications

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“…Soil enzyme activities are sensitive to soil acidification (Kunito et al 2016) due to the increasing toxic effects of protons (H + ) and aluminum ions (Al 3+ ) (Van Den Berg et al 2005). Similarly, increasing manganese (Mn 2+ ) and exchangeable Al 3+ contents with decreasing pH (Feng et al 2019) would decrease soil CUE (Jones et al 2019) because microbial resistance to toxic metals is energy-intensive (Bellion et al 2006). Furthermore, given that the bacterial community is more sensitive to low pH and Al 3+ stress than fungi (Rousk et al 2010a), a shift towards fungal dominance is expected following soil acidification (Chen et al 2013;Meng et al 2019).…”

Section: Introductionmentioning

confidence: 99%

Enhanced carbon acquisition and use efficiency alleviate microbial carbon relative to nitrogen limitation under soil acidification

Wang

Jiang

et al. 2021

Ecol Process

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Background Soil microbial communities cope with an imbalanced supply of resources by adjusting their element acquisition and utilization strategies. Although soil pH has long been considered an essential driver of microbial growth and community composition, little is known about how soil acidification affects microbial acquisition and utilization of carbon (C) and nitrogen (N). To close the knowledge gap, we simulated soil acidification and created a pH gradient by adding eight levels of elemental sulfur (S) to the soil in a meadow steppe. Results We found that S-induced soil acidification strongly enhanced the ratio of fungi to bacteria (F:B) and microbial biomass C to N (MBC:MBN) and subsequently decreased the C:N imbalance between microbial biomass and their resources. The linear decrease in the C:N imbalance with decreasing soil pH implied a conversion from N limitation to C limitation. To cope with enhanced C versus N limitation, soil microbial communities regulated the relative production of enzymes by increasing the ratio of β-glucosidase (BG, C-acquiring enzyme) to leucine aminopeptidase (LAP, N-acquiring enzyme), even though both enzymatic activities decreased with S addition. Structural equation modeling (SEM) suggested that higher C limitation and C:N-acquiring enzyme stimulated microbial carbon-use efficiency (CUE), which counteracted the negative effect of metal stress (i.e., aluminum and manganese) under soil acidification. Conclusions Overall, these results highlight the importance of stoichiometric controls in microbial adaption to soil acidification, which may help predict soil microbial responses to future acid deposition.

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Section: Introductionmentioning

confidence: 99%

Enhanced carbon acquisition and use efficiency alleviate microbial carbon relative to nitrogen limitation under soil acidification

Wang

Jiang

et al. 2021

Ecol Process

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“…Particularly when assessing the fodder nutritive value criteria, correct ratios should be taken into account [10] and the recommended optimal ratios should be as follows: K:Mg = 2-6:1; K:Na = 5:1; Ca:P = 2:1; Ca:Mg = 2-3:1; K:(Ca+Mg) = 1.62-2.2:1; (K+Na):(Ca+Mg) = 1.9-2.1:1 9 [8,22]. Despite clearly defined thresholds for the nutrient ratios, some authors indicate that various plant species (grass, leguminous, herbaceous, crops) markedly differ in terms of their nutrient ratios [8,11,[32][33][34]. The values of individual ratios given by the cited authors were varied, presenting both higher and lower values than those obtained in this study.…”

Section: Discussionmentioning

confidence: 99%

Quantitative Changes in Various Nutrient Ratios in Fodder Plants as an Effect of Compost and Fly Ash Application

Jakubus

Graczyk

2022

IJERPH

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Despite the popularity of concentrated feed, fodder crops are still important, especially in organic livestock farming. However, this type of feed must meet certain criteria, which are often described using correct nutrient ratios. The research investigates the influence of compost and fly ash on quantitative changes in nutrient ratios determined for lupine and oat cultivated on soil slightly contaminated with Cu. A pot experiment was conducted on medium soil. Immobilizing agents (compost and fly ash) were applied at the dose of 40 t per ha. Plant materials were subjected to chemical analyses to assess their macronutrient content and, based on these data, mutual proportions of individual nutrients were calculated as mass ratios of K:Mg, K:Na, Ca:P, Ca:Mg, K:(Ca+Mg) and (K+Na):(Ca+Mg). Changes in ratio values were visualized using statistical tools, i.e., Anova, correlation coefficients and dendrograms. It was found that immobilizing agents constituted a source of the chosen nutrients because their amounts in plants grown on the soil fertilized with either compost or fly ash compost were significantly higher than in the control plants. This phenomenon was especially visible with regard to Ca and Mg for both lupine and oat. It should be emphasized here that the effect of compost or fly ash on the content of Ca and K in plants was comparable. In general, the application of compost contributed to higher values of the analyzed nutrients in both plants. The control and fertilized fly ash plants were characterized by lower values of nutrient ratios. The expected optimal value range of 2–3:1 was determined only for Ca:Mg, which was found in both lupine and oats. The proper values of K:Mg (2–6:1) were found only in the case of fodder plants cultivated on soil amended with compost.

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“…The availability of soil elements can directly affect nutrient utilization by plants, which in turn alters the stoichiometric ratio and degree of plant element coupling, such as the utilization of P by leaves. The nutrient requirements of plants can also influence the coupling status of their element utilization due to specific physiological and structural functions of plants that determine the characteristics of plant requirements for different nutrients [42]. For example, the nutrient utilization of leaves (N and K in leaves) in this study was independent of the increase in soil available elements; however, leaves increased the absorption and utilization of P. As plant leaf biomass and elemental acquisition increased with increasing planting time (Figure 7), the discrepancy between plant demand in leaves and soil nutrient availability may further exacerbate the soil nutrient imbalance, resulting in the decoupling of P from other elements.…”

Section: Decoupling Of Element Utilization In Leaf With Increasing Planting Timementioning

confidence: 99%

“…This was likely caused by the utilization of P promoting accumulation of cucumber leaf biomass, which resulted in a decrease in HI. Since plants maintain the optimal ratio of their elemental concentrations, they can maintain a relative balance of elements by adjusting their morphological structure in response to environmental changes [42,43]. To some extent, this explains the variation in P decoupling from other elements in the cucumber leaf.…”

Section: Decoupling Of Element Utilization In Leaf With Increasing Planting Timementioning

confidence: 99%

Decoupling of P from C, N, and K Elements in Cucumber Leaves Caused by Nutrient Imbalance under a Greenhouse Continuous Cropping System

et al. 2021

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There is insufficient information regarding the stoichiometric variation and coupling status of carbon (C), nitrogen (N), phosphorus (P), and potassium (K) in the leaves of nutrient-enriched greenhouse agroecosystems with increasing planting time. Therefore, we assessed the variation in elemental stoichiometry ratios in soil and cucumber (Cucumis sativus L.) leaves, and the coupling status of elemental utilization in the leaves under continuous cropping systems using natural (only soil; i.e., control soil, CO) and artificial (soil + straw + chicken + urea; i.e., straw mixture soil, ST) soil via monitoring studies for 11 years in a solar greenhouse. Soil organic C, total N, and total P concentrations increased by 63.4%, 72.7%, and 144.3% in the CO, respectively, after 11 years of cultivation (compared to the first year), and by 18.1%, 24.3%, and 117.7% in the ST under continuous cropping conditions, respectively. Total K concentrations remained unchanged in both soils. Moreover, the availability of these soil elements increased to different degrees in both soils after 11 years of planting. Additionally, the leaf P concentration increased by 9.8% in the CO, while leaf N and K concentrations did not change, suggesting decoupling of P utilization from that of N and K in leaves under a continuous cropping system. These findings suggest that imbalanced soil nutrients under continuous cropping conditions results in decoupling of P from N and K in the utilization of leaf nutrients.

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Decoupling of plant and soil metal nutrients as affected by nitrogen addition in a meadow steppe

Cited by 20 publications

References 68 publications

Enhanced carbon acquisition and use efficiency alleviate microbial carbon relative to nitrogen limitation under soil acidification

Enhanced carbon acquisition and use efficiency alleviate microbial carbon relative to nitrogen limitation under soil acidification

Quantitative Changes in Various Nutrient Ratios in Fodder Plants as an Effect of Compost and Fly Ash Application

Decoupling of P from C, N, and K Elements in Cucumber Leaves Caused by Nutrient Imbalance under a Greenhouse Continuous Cropping System

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