Seasonal and long-term resource-related variations in soil microbial communities in wheat-based rotations of the Canadian prairie

Hamel, Chantal; Hanson, K.; Selles, F.; Cruz, André Freire; Lemke, R.; McConkey, B.G.; Zentner, R. P.

doi:10.1016/j.soilbio.2006.01.011

Cited by 138 publications

(67 citation statements)

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“…The main reason for this effect is the fact that all are dependent on aboveground productivity as their energy source -aboveground seasonality must find its reflection belowground. At present, we have only a very fragmented picture of this relationship, there is some evidence that microbial communities undergo a complete turnover from winter to summer (Hamel et al 2006), are differentially affected by seasonal resource availability and that changes in plant community exert strong influence over the composition of soil biota. The latter factor might be of critical importance in forest ecosystems, especially in the case of conversion of natural forests to plantations or restocking of stands with the view of increasing their climate change resilience.…”

Section: Soil Biodiversity and Its Organisationmentioning

confidence: 99%

Soil biodiversity and environmental change in European forests

Lukáč

2017

Central European Forestry Journal

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Biodiversity not only responds to environmental change, but has been shown to be one of the key drivers of ecosystem function and service delivery. Forest soil biodiversity is also governed by these principles, the structure of soil biological communities is clearly determined by spatial, temporal and hierarchical factors. Global environmental change, together with land-use change and forest ecosystem management, impacts the aboveground structure and composition of European forests. Due to the close link between the above-and belowground parts of forest ecosystems, we know that soil biodiversity is also impacted. However, very little is known about the nature of these impacts; effects they have on the overall level of biodiversity, the functions it fulfills, and on the future stability of forests and forest soils. Even though much remains to be learned about the relationships between soil biodiversity and forest ecosystem functionality, it is clear that better effort needs to be made to preserve existing soil biodiversity and forest conservation strategies taking soils into account must be considered.

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Section: Soil Biodiversity and Its Organisationmentioning

confidence: 99%

Soil biodiversity and environmental change in European forests

Lukáč

2017

Central European Forestry Journal

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“…Although some studies have observed differential fungal abundance in the autumn and spring seasons (Spedding et al 2004;Habekost et al 2008), seasonal variations in soil microbial communities are somewhat inconsistent in previously published studies. Some studies report higher total microbial biomass and activities in summer seasons (Bardgett et al 1999;Griffiths et al 2003;Hamel et al 2006). Others addressed an abundance of highly active microbes in spring (Bardgett et al 1999) or in fall (Spedding et al 2004).…”

Section: Actinomycetesmentioning

confidence: 99%

The effect of weeds on soil arbuscular mycorrhizal fungi and agronomic traits in spring wheat (Triticum aestivumL.) under organic management in Canada

et al. 2015

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. 2015. The effect of weeds on soil arbuscular mycorrhizal fungi and agronomic traits in spring wheat (Triticum aestivum L.) under organic management in Canada. Can. J. Plant Sci. 95: 615Á627. Understanding the influence of weeds in agroecosystems may aid in developing efficient and sustainable organic wheat production systems. We examined the effect of weeds on soil microbial communities and the performance of spring wheat (Triticum aestivum L.) under organic management in Edmonton, AB, Canada. We grew 13 Canadian spring wheat cultivars in organically managed hand-weeded less-weedy and weedy treatments in 2010 and 2011. The less-weedy treatment exhibited greater grain yield and tillers per square meter, while kernel weight, test weight, days to maturity, plant height, grain P and protein content were not altered by weed treatment. Canada Western Red Spring (CWRS) wheat cultivars CDC Go and CDC Kernen were the most yield-stable because they minimized fertile tiller reduction in response to weed pressure (10 and 13% reduction, respectively, compared with the average reduction of 20%). Other cultivars exhibited yield stability through increased kernel weight. The contribution of arbuscular mycorrhizal fungi (AMF) to the total phospholipid fatty acid increased in both treatments; however, the rate of this increase was greater in the weedy treatment than the less-weedy treatment (from 2.9 to 3.9%, from 2.8 to 3.1%, respectively). Weed dry biomass was positively correlated with AMF% in the less-weedy treatment only. Organic systems tend to be weedier than conventional systems. We found that weeds are important determinants of AMF proliferation in soil. In addition, choosing wheat cultivars that maintain important yield components under severe weed stress is one strategy to maximize yields in organic systems.Key words: Organic agriculture, wheat (spring), arbuscular mycorrhizal fungi, weed Kubota, H., Quideau, S. A., Hucl, P. J. et Spaner, D. M. 2015. Incidence des mauvaises herbes sur la mycorhizes a`arbuscules dans le sol et sur les parame`tres agronomiques du ble´de printemps (Triticum aestivum L.) cultive´de fac¸on biologique au Canada. Can. J. Plant Sci. 95: 615Á627. Comprendre l'influence des adventices dans les e´cosyste`mes agricoles pourrait faciliter l'e´laboration de syste`mes de production efficaces et durables pour la culture biologique du ble´. Les auteurs ont examine´l'impact des mauvaises herbes sur la microflore du sol et sur le rendement du ble´de printemps (Triticum aestivum L.) cultive´de fac¸on biologique a`Edmonton, en Alberta (Canada). À cette fin, ils ont cultive´biologiquement treize varie´te´s canadiennes de ble´de printemps sur des parcelles de´sherbe´es a`la main ou envahies de mauvaises herbes en 2010 et en 2011. Les parcelles de´sherbe´es ont produit plus de grain et de talles par m 2 , mais les mauvaises herbes ne modifient pas le poids du grain, le poids spe´cifique, le nombre de jours jusqu'a`maturite´, la hauteur du plant, la teneur en P du grain ni la concentration de prote´ines. Les...

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“…On the Canadian prairies, rotation of wheat with oilseeds or pulse crops is widely adopted and has been reported to increase grain yield and quality of subsequent crops through reduced disease incidence, improved water use efficiency, soil physical and chemical properties, and enhanced soil ecological environments [21][22][23]. Several studies have addressed the impact of crop rotation on Cd concentration in crops.…”

Section: Introductionmentioning

confidence: 99%

Cadmium and Zinc Concentration in Grain of Durum Wheat in Relation to Phosphorus Fertilization, Crop Sequence and Tillage Management

Gao

Grant

2012

Applied and Environmental Soil Science

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Field experiments were conducted at two locations in Manitoba, Canada, to determine the effect of crop rotation, phosphorus (P) fertilization and tillage on grain yield and grain concentrations of Cd and Zn in durum wheat (Triticum durum L.). Compared to conventional tillage (CT), reduced tillage (RT) management decreased grain Cd and increased grain yield and grain Zn in half of the site-years. The type of preceding crops of spring wheat-flax or canola-flax had little influence. Rate and timing of P application had little effect on grain Cd, but increasing P rate tended to decrease grain Zn. No interactive effect was detected among tested factors. Grain Zn was not related to grain Cd, but positively to other nutrients such as Fe, Mn, P, Ca, K, and Mg. Both grain Zn and Fe correlated positively with grain protein content, suggesting protein may represent a sink for micronutrients. The study suggested that the tillage management may have beneficial effects on both grain yield and quality. Phosphorus fertilizer can remain available for subsequent crops and high annual inputs in the crop sequence may decrease crop grain Zn. Understanding the environment is important in determining the impact of agricultural management on agronomic and nutrient traits.

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Seasonal and long-term resource-related variations in soil microbial communities in wheat-based rotations of the Canadian prairie

Cited by 138 publications

References 50 publications

Soil biodiversity and environmental change in European forests

Soil biodiversity and environmental change in European forests

The effect of weeds on soil arbuscular mycorrhizal fungi and agronomic traits in spring wheat (Triticum aestivumL.) under organic management in Canada

Cadmium and Zinc Concentration in Grain of Durum Wheat in Relation to Phosphorus Fertilization, Crop Sequence and Tillage Management

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