Marie-Noëlle Thivierge- Agr., Ph.D.
- Research scientist at Agriculture and Agri-Food Canada
Marie-Noëlle Thivierge
- Agr., Ph.D.
- Research scientist at Agriculture and Agri-Food Canada
About
34
Publications
6,872
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Introduction
My research activities focus on quantifying the ecosystem services provided by perennial forages and optimizing their yield, persistence, resilience and adaptation to climate change through improved crop management practices. I have a strong interest in multi-species forage mixtures. An integral part of my research program is devoted to the study of root traits of perennial crops in relation to C sequestration and resilience to climate change disturbances.
Current institution
Additional affiliations
December 2014 - December 2015
Education
May 2011 - December 2014
University Laval, Québec, Canada
Field of study
- Biologie végétale/Plant sciences
Publications
Publications (34)
Climate change is expected to increase agricultural productivity in Canada and in other northern countries but this increase will likely affect the environmental performance of dairy farms, one of the most important agricultural sectors in Canada. The objective of this study was to project the impact of climate change on the agronomic and environme...
AimsExtensive knowledge of perennial forage root systems is essential, given their critical role in below-ground C input.Methods
Root length and diameter were quantified periodically from 2016 to 2018 with minirhizotrons in a field experiment with three forage management systems: mixture of timothy (Phleum pratense L.) and tall fescue (Festuca arun...
In the continental cold and humid areas of northeastern North America, climate change by mid‐century may increase the yield potential of perennial forage species as a result of increased temperature and atmospheric CO2 concentration, and a longer growing season compared to the 1990−2000 period. More winter thaws and less snow cover along with more...
Aims
Perennial forages in rotation with annual crops can improve agricultural resilience by increasing soil organic carbon. However, how nitrogen (N) sources interact with rotation diversity to influence soil nitrous oxide (N2O) emissions is not well understood.
Methods
During three snow-free seasons, N2O emissions, crop yields, and ancillary vari...
Crop rotations on dairy farms in eastern Canada nowadays include fewer perennial crops and more nitrogen‐demanding annual crops. This study compared, over a 7‐year rotation cycle, the agronomic performance and the legacy effect of six crop rotations that varied in crop types (perennial or annual) and nutrient sources (mineral or organic). Crop yiel...
Allelopathic effects may be a contributing factor in the mixed success of legume re-establishment in Kentucky bluegrass (Poa pratensis L.)-dominated pastures. Under controlled conditions, we evaluated whether aqueous shoot or root extracts from Kentucky bluegrass would affect seed germination for three alfalfa (Medicago sativa L.) cultivars after a...
Energy‐to‐protein ratios have been suggested as a potential forage attribute related to nitrogen (N) use efficiency in dairy cows but how these ratios vary with the cutting management of alfalfa‐based mixtures is poorly known. Our objective was to determine the effect of cutting schedules of alfalfa‐based mixtures and their species composition on t...
Alfalfa (Medicago sativa L., AL)‐based forage mixtures are a major constituent of ruminant rations, and optimizing their energy‐to‐protein ratio has been identified as a way to improve N use efficiency. This study aimed to determine whether the energy‐to‐protein ratio could be improved by adding red clover (Trifolium pratense L., RC) or birdsfoot t...
Roots of perennial grasses, with their fibrous architecture, are difficult to separate from the surrounding soil. We assessed the effect of five soaking solutions (sodium bicarbonate, sodium chloride, disodium ethylenediamine tetraacetic acid [disodium EDTA], distilled water, and sodium hexametaphosphate) and three soaking durations (15 min, 2 h, a...
In eastern Canada, organic grain producers have a rising interest in using cover crop mixtures instead of pure stands to maximize ecosystem services. Yield stability and belowground biomass of cover crop mixtures have however received limited attention in the scientific literature, although they do affect ecosystem services. The aims of this study...
Organic growers rely heavily on manure additions to meet corn (Zea mays L.) nitrogen (N) needs. Considering the limited availability of farmyard manure and its increasing cost, the use of cover crop mixtures may help in addressing this challenge. The impact of fall‐seeded cover crops with or without pelletized poultry manure application on corn yie...
The intensification of agriculture has resulted in the loss of species diversity in agroecosystems. Crop diversification not only improves ecosystem functions but increases agroecosystem resilience to climate change. Cover crops (CC) are used in the crop rotation to increase plant diversity and provide continuous living roots and soil cover. Previo...
In Canada, the agricultural sector has long held a prominent economic, social and cultural position, from substantial evidence of extensive fishing and farming since the times of the first human settlements, to currently accounting for over 100 billion dollars of production and employing 2.3 million people. Steady growth in agricultural production...
Non-legume bioenergy crops can be fertilized with animal manures instead of mineral fertilizers, but the simultaneous application of carbon (C) and nitrogen (N) with manures can increase nitrous oxide (N2O) emissions. On the other hand, manure could increase soil organic C stocks and partly offset greenhouse gas (GHG) emissions and global warming p...
Public demand for organic products is increasing, and there is a great economic benefit to
grow organic corn for farmers. However, many agronomic challenges remain with growing
corn organically. Among them, nitrogen fertilization and management are particularly
challenging for organic producers. In Quebec, organic growers have a great interest in m...
Nitrogen management is particularly challenging for organic producers since they are not allowed to use mineral sources of nitrogen. Therefore, they rely heavily on legume cover crops for nitrogen input. In Quebec, there is a recent interest for multi-species cover crop mixtures. However, there is a lack of information about the efficiency and the...
Genetic variability for stem cell wall (CW) digestibility could be exploited to improve rumen-fermentable energy in alfalfa (Medicago sativa L.) forage. We evaluated in the field the response to recurrent selection for stem CW digestibility in alfalfa. Digestibility was assessed as the concentration of glucose released after enzymatic hydrolysis of...
Increasing N fertilization decreased the in vitro digestibility of dry matter (IVTD) and neutral detergent fiber (NDF) but increased N concentration of sweet sorghum [Sorghum bicolor (L.) Moench] and sweet pearl millet
[Pennisetum glaucum (L.) R.Br.] in eastern Canada. Sweet sorghum had lower NDF, acid detergent fiber, and N concentrations, and gre...
La stabilisation de berge est un enjeu important pour la protection des infrastructures routières et urbaines. Les approches alternatives au génie civil comme le génie végétal suscitent un intérêt grandissant. Bien que la capacité de bouturage de plusieurs espèces d’arbustes typiques de milieux riverains soit bien connue et exploitée en génie végét...
The objective of the study was to determine root and shoot biomass and nutrient concentration of 4 cover crop species at 4 phenological stages.
Climate change studies have often focused on individual forage species although legume‐grass mixtures are predominant on dairy farms in northern areas of North America. We assessed the effect of (i) future climate conditions (temperature and precipitation) and elevated atmospheric CO 2 concentration ([CO 2 ]), separately and together, on yield of a...
Little information exists on root morphological characteristics of agricultural crops under field conditions, which can be a major determinant of plant N uptake efficiency and C input to soil. Sweet pearl millet [Pennisetum glaucum (L.) R.BR.] and sweet sorghum [Sorghum bicolor (L.) Moench] are envisioned as energy crops in eastern Canada, to compl...
Nitrogen use efficiency is a key factor for the economic and environmental sustainability of farms. It comprises the ability for crops to recover applied fertilizer N in their aboveground biomass, called fertilizer
N uptake efficiency (NupE). Sweet pearl millet [Pennisetum glaucum (L.) R.BR.] and sweet sorghum [Sorghum bicolor (L.) Moench] are C4 a...
Sweet pearl millet [Pennisetum glaucum (L.) R.BR.] and sweet sorghum [Sorghum bicolor (L.) Moench] are considered for ethanol production in eastern Canada, but their response to N fertilization is not well established. Our objectives were (i) to compare both species for dry matter (DM), water-soluble carbohydrate (WSC), and estimated eth-anol yield...
Sweet pearl millet (Pennisetum glaucum [L.] R. BR.) (SPM) and sweet sorghum (Sorghum bicolor [L.] Moench) (SS) are annual C4 grasses that could be interesting alternatives to corn (Zea mays [L.]) for ethanol production in Eastern Canada. The nitrogen (N) requirements of SPM and SS are considerably lower than for corn, suggesting a greater efficienc...
