Fertilization practices alter microbial nutrient limitations after alleviation of carbon limitation in a Ferric Acrisol

Traoré, Ouola; Kiba, Delwendé Innocent; Arnold, M. C.; Fließbach, Andreas; Oberholzer, Hans‐Rudolf; Nacro, Hassan B.; Lompo, François; Oberson, Astrid; Frossard, Emmanuel; Bünemann, Else K.

doi:10.1007/s00374-015-1061-9

Cited by 37 publications

(25 citation statements)

References 40 publications

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“…Finally, the high microbial N : P value observed in the CON treatment compared to the data shown in Table 1 suggests that microorganisms were P-limited in this treatment. This supports the hypothesis of a P limitation of microorganisms in this treatment proposed by Traoré et al (2016) based on changes in microbial respiration and biomass production following C, N, and P additions to this soil in a short-term incubation experiment. 3 The Wagga Wagga field experiment…”

Section: 23supporting

confidence: 89%

Soil properties and not inputs control carbon : nitrogen : phosphorus ratios in cropped soils in the long term

Frossard

Buchmann

Bünemann

et al. 2016

SOIL

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Abstract. Stoichiometric approaches have been applied to understand the relationship between soil organic matter dynamics and biological nutrient transformations. However, very few studies have explicitly considered the effects of agricultural management practices on the soil C : N : P ratio. The aim of this study was to assess how different input types and rates would affect the C : N : P molar ratios of bulk soil, organic matter and microbial biomass in cropped soils in the long term. Thus, we analysed the C, N, and P inputs and budgets as well as soil properties in three long-term experiments established on different soil types: the Saria soil fertility trial (Burkina Faso), the Wagga Wagga rotation/stubble management/soil preparation trial (Australia), and the DOK (bio-Dynamic, bio-Organic, and “Konventionell”) cropping system trial (Switzerland). In each of these trials, there was a large range of C, N, and P inputs which had a strong impact on element concentrations in soils. However, although C : N : P ratios of the inputs were highly variable, they had only weak effects on soil C : N : P ratios. At Saria, a positive correlation was found between the N : P ratio of inputs and microbial biomass, while no relation was observed between the nutrient ratios of inputs and soil organic matter. At Wagga Wagga, the C : P ratio of inputs was significantly correlated to total soil C : P, N : P, and C : N ratios, but had no impact on the elemental composition of microbial biomass. In the DOK trial, a positive correlation was found between the C budget and the C to organic P ratio in soils, while the nutrient ratios of inputs were not related to those in the microbial biomass. We argue that these responses are due to differences in soil properties among sites. At Saria, the soil is dominated by quartz and some kaolinite, has a coarse texture, a fragile structure, and a low nutrient content. Thus, microorganisms feed on inputs (plant residues, manure). In contrast, the soil at Wagga Wagga contains illite and haematite, is richer in clay and nutrients, and has a stable structure. Thus, organic matter is protected from mineralization and can therefore accumulate, allowing microorganisms to feed on soil nutrients and to keep a constant C : N : P ratio. The DOK soil represents an intermediate situation, with high nutrient concentrations, but a rather fragile soil structure, where organic matter does not accumulate. We conclude that the study of C, N, and P ratios is important to understand the functioning of cropped soils in the long term, but that it must be coupled with a precise assessment of element inputs and budgets in the system and a good understanding of the ability of soils to stabilize C, N, and P compounds.

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Section: 23supporting

confidence: 89%

Soil properties and not inputs control carbon : nitrogen : phosphorus ratios in cropped soils in the long term

Frossard

Buchmann

Bünemann

et al. 2016

SOIL

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Section: Relations Between C N and P Inputs; N And P Budgets; And Ssupporting

confidence: 89%

“…Finally, Kirkby et al (2013Kirkby et al ( , 2014 showed that more C was transferred from straw to stable soil organic matter when soils were incubated in the presence of N and P added in water-soluble forms, and that this greater C transfer rate was accompanied by greater microbial C concentration. This last point is in agreement with findings suggesting that a large fraction of soil organic matter is of microbial origin Schmidt et al, 2011;Miltner et al, 2012;Cotrufo et al, 2013;Trivedi et al, 2013). This introduction shows that there is already a significant body of information on the C, N, and P relationships in soils, and it illustrates how this knowledge is used.…”

Section: Introductionsupporting

confidence: 89%

Soil properties and not inputs control carbon, nitrogen, phosphorus ratios in cropped soils in the long-term

Frossard¹,

Buchmann²,

Bünemann³

et al. 2015

Preprint

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Abstract. Stoichiometric approaches have been applied to understand the relationship between soil organic matter dynamics and biological nutrient transformations. However, very few studies explicitly considered the effects of agricultural management practices on soil C : N : P ratio. The aim of this study was to assess how different input types and rates would affect the C : N : P molar ratios of bulk soil, organic matter and microbial biomass in cropped soils in the long-term. Thus, we analysed the C, N and P inputs and budgets as well as soil properties in three long-term experiments established on different soil types: the Saria soil fertility trial (Burkina Faso), the Wagga Wagga rotation/stubble management/soil preparation trial (Australia), and the DOK cropping system trial (Switzerland). In each of these trials, there was a large range of C, N and P inputs which had a strong impact on element concentrations in soils. However, although C : N : P ratios of the inputs were highly variable, they had only weak effects on soil C : N : P ratios. At Saria, a positive correlation was found between the N : P ratio of inputs and microbial biomass, while no relation was observed between the nutrient ratios of inputs and soil organic matter. At Wagga Wagga, the C : P ratio of inputs was significantly correlated to total soil C : P, N : P and C : N ratios, but had no impact on the elemental composition of microbial biomass. In the DOK trial, a positive correlation was found between the C budget and the C to organic P ratio in soils, while the nutrient ratios of inputs were not related to those in the microbial biomass. We argue that these responses are due to differences in soil properties among sites. At Saria, the soil is dominated by quartz and some kaolinite, has a coarse texture, a fragile structure and a low nutrient content. Thus, microorganisms feed on inputs (plant residues, manure). In contrast, the soil at Wagga Wagga contains illite and haematite, is richer in clay and nutrients and has a stable structure. Thus, organic matter is protected from mineralization and can therefore accumulate, allowing microorganisms to feed on soil nutrients and to keep a constant C : N : P ratio. The DOK soil represents an intermediate situation, with high nutrient concentrations, but a rather fragile soil structure, where organic matter does not accumulate. We conclude that the study of C, N, and P ratios is important to understand the functioning of cropped soils in the long-term, but that it must be coupled with a precise assessment of element inputs and budgets in the system and a good understanding of the ability of soils to stabilize C, N and P compounds.

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“…However this does not imply that N was not limited in the CK treatment. Some work has shown that monounsaturated PLFAs and fungi indexed PLFAs increased under starvation conditions such as N limitation (Heipieper et al, 1996;Traore et al, 2016), consistent with the current results. Du et al (2018) found that the abundance of soil bacteria (including nitrifiers and denitrifiers), fungi, and actinomycetes increased with increased N application in greenhouse celery production.…”

Section: Discussionsupporting

confidence: 92%

Dynamic changes in soil chemical properties and microbial community structure in response to different nitrogen fertilizers in an acidified celery soil

et al. 2019

Soil Ecol. Lett.

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To determine the effects of different kinds of nitrogen fertilizer, especially high-efficiency slowrelease fertilizers, on soil pH, nitrogen (N) and microbial community structures in an acidic celery soil, four treatments (CK, no N fertilizer; NR, urea; PE, calcium cyanamide fertilizer; and SK, controlled-release N fertilizer) were applied, and soil pH, total soil N, inorganic N, and soil microbial biomass C were analyzed. Phospholipid fatty acids (PLFAs) were extracted and detected using the MIDI Sherlock microbial identification system. The PE treatment significantly improved soil pH, from 4.80 to >6.00, during the whole growth period of the celery, and resulted in the highest celery yield among the four treatments. After 14 d application of calcium cyanamide, the soil nitrate content significantly decreased, but the ammonium content significantly increased. The PE treatment also significantly increased soil microbial biomass C during the whole celery growth period. Canonical variate analysis of the PLFA data indicated that the soil microbial community structure in the CK treatment was significantly different from those in the N applied treatments after 49 d fertilization. However, there was a significant difference (P < 0.05) in soil microbial community structure between the PE treatment and the other three treatments at the end of the experiment. Calcium cyanamide is a good choice for farmers to use on acidic celery land because it supplies sufficient N, and increases soil pH, microbial biomass and the yield of celery.

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Fertilization practices alter microbial nutrient limitations after alleviation of carbon limitation in a Ferric Acrisol

Cited by 37 publications

References 40 publications

Soil properties and not inputs control carbon : nitrogen : phosphorus ratios in cropped soils in the long term

Soil properties and not inputs control carbon : nitrogen : phosphorus ratios in cropped soils in the long term

Soil properties and not inputs control carbon, nitrogen, phosphorus ratios in cropped soils in the long-term

Dynamic changes in soil chemical properties and microbial community structure in response to different nitrogen fertilizers in an acidified celery soil

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Fertilization practices alter microbial nutrient limitations after alleviation of carbon limitation in a Ferric Acrisol

Cited by 37 publications

References 40 publications

Soil properties and not inputs control carbon : nitrogen : phosphorus ratios in cropped soils in the long term

Soil properties and not inputs control carbon : nitrogen : phosphorus ratios in cropped soils in the long term

Soil properties and not inputs control carbon, nitrogen, phosphorus ratios in cropped soils in the long-term

Dynamic changes in soil chemical properties and microbial community structure in response to different nitrogen fertilizers in an acidified celery soil

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Product

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Soil properties and not inputs control carbon : nitrogen : phosphorus ratios in cropped soils in the long term

Soil properties and not inputs control carbon : nitrogen : phosphorus ratios in cropped soils in the long term