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  1. Article ; Online: Simulation of Episodic Winter Warming on Dehardening of Boreal Forest Seedlings in Northern Forest Nurseries

    Lamhamedi, Mohammed S. / Lambert, Marie Claude / Renaud, Mario

    Forests. 2022 Nov. 23, v. 13, no. 12

    2022  

    Abstract: In recent decades, forest nurseries in eastern Canada have been faced with periods of mild winter weather, delayed snowfall, and low seedling protective snow cover combined with winter rains instead of snowfall. These extreme conditions have resulted in ... ...

    Abstract In recent decades, forest nurseries in eastern Canada have been faced with periods of mild winter weather, delayed snowfall, and low seedling protective snow cover combined with winter rains instead of snowfall. These extreme conditions have resulted in the loss of millions of seedlings, in particular those that overwinter outdoors, probably due to their winter dehardening. The main objective of this study is to simulate different periods of warm weather at the beginning and end of winter and evaluate their effects on the dehardening and growth of Picea mariana and Picea glauca seedlings in response to different freezing temperatures. Three warming treatments were simulated (control, 1 day, and 3 days of warming at 10 °C) followed by three freezing temperatures (−4, −12, and −20 °C). In winter, regardless of the warming treatment, the seedlings of the two species tolerated the different freezing temperatures without any apparent damage. However, at the end of winter and in the absence of snow cover, the seedlings did not show frost tolerance at −20 °C. On the other hand, the seedlings showed normal growth after undergoing frosts at −4 °C and −12 °C, similar to that observed for control seedlings. Different cultural practices and protection strategies are proposed to improve frost tolerance and reduce the winter loss of seedlings.
    Keywords Picea glauca ; Picea mariana ; boreal forests ; frost resistance ; seedlings ; snow ; snowpack ; winter ; Canada
    Language English
    Dates of publication 2022-1123
    Publishing place Multidisciplinary Digital Publishing Institute
    Document type Article ; Online
    ZDB-ID 2527081-3
    ISSN 1999-4907
    ISSN 1999-4907
    DOI 10.3390/f13121975
    Database NAL-Catalogue (AGRICOLA)

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  2. Article ; Online: The Production Chain of Tree Seedlings, from Seeds to Sustainable Plantations

    Mohammed S. Lamhamedi / Steeve Pepin / Damase Khasa

    Forests, Vol 14, Iss 1693, p

    An Essential Link for the Success of Reforestation and Restoration Programs in the Context of Climate Change

    2023  Volume 1693

    Abstract: Although the evolution of principles, procedures, and predictive abilities related to seedling quality throughout the plant production chain (i.e., from seeds to sustainable plantations) has been reviewed over the past decades in various technical and ... ...

    Abstract Although the evolution of principles, procedures, and predictive abilities related to seedling quality throughout the plant production chain (i.e., from seeds to sustainable plantations) has been reviewed over the past decades in various technical and scientific publications, there is still a need to develop and integrate new and efficient practices in forest nurseries and at planting sites, in order to improve the morphophysiological quality of seedlings and saplings, and their survival and growth under different site and environmental conditions in the context of climate change. We have grouped together different scientific articles in this Special Issue of Forests , entitled “Production in Forest Nurseries and Field Performance of Seedlings”. They cover different topics relating to the seedling production chain in different countries and continents, from growing media to planting performance related to reforestation, restoration, and agroforestry programs.
    Keywords forest nursery ; cultural practices ; microbial inoculation ; planting performance ; environmental stress ; Plant ecology ; QK900-989
    Subject code 333
    Language English
    Publishing date 2023-08-01T00:00:00Z
    Publisher MDPI AG
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  3. Article: Granular Calcite: A New Cultural Practice to Improve the Physicochemistry of the Peat Substrate, Growth and Morphophysiological Quality of White Spruce Seedlings in Forest Nurseries

    Lamhamedi, Mohammed S. / Renaud, Mario / Auger, Isabelle

    Land. 2021 June 22, v. 10, no. 7

    2021  

    Abstract: Growing Picea glauca seedlings poses many challenges for forest nursery managers, including reaching the target height at the end of the first growing season (1 + 0) and the homogeneity and uniformity of seedling growth. To increase growth and ... ...

    Abstract Growing Picea glauca seedlings poses many challenges for forest nursery managers, including reaching the target height at the end of the first growing season (1 + 0) and the homogeneity and uniformity of seedling growth. To increase growth and morphophysiological quality of white spruce seedlings (1 + 0), emphasis was placed on improving the physicochemistry of the acidic peat substrate by replacing silica with granular calcite as a covering material. The objective of our study is to compare the effects of silica and calcite on the physicochemistry of the peat substrate, as well as on growth and mineral nutrition of white spruce seedlings (1 + 0) under forest nursery conditions. Three treatments were used to cover the cavities of large white spruce seedlings produced in containers: silica (29 g/cavity; control treatment), calcite (24 g/cavity) and calcite + (31 g/cavity). At the end of the first growing season, the two calcite treatments significantly increased the total dry mass (28%), roots (27%) and shoot (29%) dry masses and height (24%) compared to silica treatments. Average calcium concentration and content of calcite treatments were significantly higher than that of silica treatment.
    Keywords Picea glauca ; calcite ; calcium ; forest nurseries ; forests ; land ; nutrition ; peat ; seedling growth ; silica
    Language English
    Dates of publication 2021-0622
    Publishing place Multidisciplinary Digital Publishing Institute
    Document type Article
    ZDB-ID 2682955-1
    ISSN 2073-445X
    ISSN 2073-445X
    DOI 10.3390/land10070661
    Database NAL-Catalogue (AGRICOLA)

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  4. Book: La surélèvation des récipients en pépinière forestière au Québec

    Lamhamedi, Mohammed S / Renaud, Mario

    quels sont ses effets sur la morphophysiologie des plants pendant la saison de croissance et sur leur viabilité en hiver?

    (Note de recherche forestière ; 151)

    2018  

    Author's details Mohammed S. Lamhamedi et Mario Renaud
    Series title Note de recherche forestière ; 151
    Keywords Containerpflanzung ; Schwarzfichte
    Language French
    Size 17 Seiten, Illustrationen
    Document type Book
    Note Sprache der Zusammenfassung: Englisch
    ISBN 9782550809593 ; 9782550809647 ; 2550809599 ; 2550809645
    Database Johann Heinrich von Thünen-Institut, Federal Research Institute for Rural Areas, Forestry and Fisheries

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  5. Article ; Online: An Exploration of the Land–(Renewable) Energy Nexus

    Bouchra El Houda Lamhamedi / Walter Timo de Vries

    Land, Vol 11, Iss 767, p

    2022  Volume 767

    Abstract: The need to understand the connection between land and energy has gained prominence in the calls to opt for renewable energy as part of the climate change mitigation actions. This need derives from the fact that renewable energy resources are site- ... ...

    Abstract The need to understand the connection between land and energy has gained prominence in the calls to opt for renewable energy as part of the climate change mitigation actions. This need derives from the fact that renewable energy resources are site-specific and require rightful access and use of land. The impacts on landscape, land tenure, and land-use patterns of constructing energy facilities are significant, and they may subsequently undermine the authority of local communities. Still, the connection between land and energy is not yet part of integrated development policies and political debates when deciding on renewable energy projects. Therefore, this study critically reviews the land–energy nexus with the aim to understand and explain how the uptake of renewable energy is shaping the land–energy nexus and how renewable energy technologies are evolving and interacting in different regions of the world, particularly in the Global South. Theoretically, the land–energy nexus tends to reflect a dual tension between those who support the rapid expansion of renewable energy projects and those who oppose it due to concerns over land pressure and social impacts. We consider that this contrast is ruled by both the ecological modernization paradigm and the environmental and social justice paradigm, as part of wider environmental and social debates. The study adopts an integrative literature review built on the analysis of existing literature and deductive logical reasoning to create new, exhaustive scientific knowledge focusing on three interdependent dimensions: land requirements and planning policy, environmental impacts, and public opposition, as an informative guidance for future research and policies. The multiple forms of social dispute and agency demonstrate that dominant narratives supporting renewables act as a modern technological fix but provide only a partial solution for the climate and energy crisis. The deployment of renewable energy creates land pressures and spatial patterns of uneven development. ...
    Keywords renewable energy ; solar energy ; solar PV ; solar thermal ; wind energy ; energy planning ; Agriculture ; S
    Subject code 690
    Language English
    Publishing date 2022-05-01T00:00:00Z
    Publisher MDPI AG
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  6. Article ; Online: Potential Use of Two Forest Species ( Salix alba and Casuarina glauca ) in the Rhizofiltration of Heavy-Metal-Contaminated Industrial Wastewater

    Malek Bousbih / Mohammed S. Lamhamedi / Mejda Abassi / Damase P. Khasa / Zoubeir Béjaoui

    Forests, Vol 14, Iss 654, p

    2023  Volume 654

    Abstract: ... relative to controls. S. alba exhibited greater removal capacity for heavy metal ions and could be ...

    Abstract The discharge of raw industrial wastewater (IWW) into ecosystems is a major environmental problem that adversely affects water quality, soil physicochemical properties, the food chain and, therefore, human health. Injection of treated IWW into irrigation and “fertigation” systems is an ecological, sustainable and economical approach for its appropriate disposal. Seedlings of two forest species ( Salix alba , Casuarina glauca) were grown hydroponically and subjected to 25% diluted IWW and control (tap water) treatments for 35 days. Morphological and physiological traits were evaluated, including leaf symptoms, stem and root dry masses, leaf water potential, relative water content, chlorophyll content, photosystem II efficiency, hydrogen peroxide, thiobarbituric acid reactive substances, bioaccumulation and translocation factor estimates and removal efficiency for various heavy metals. Application of 25% IWW stress affected many aspects of plant morphology: chlorosis and necrosis in leaves, epinasty, leaf curling, early leaf senescence and root browning. In both species, the 25% IWW treatment reduced leaf, stem and root dry masses relative to controls. S. alba exhibited greater removal capacity for heavy metal ions and could be effective as a remediator of toxic-metal-polluted industrial effluent water.
    Keywords industrial wastewater ; toxicity ; heavy metals ; Salix alba ; Casuarina glauca ; rhizofiltration ; Plant ecology ; QK900-989
    Language English
    Publishing date 2023-03-01T00:00:00Z
    Publisher MDPI AG
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  7. Article ; Online: Granular Calcite

    Mohammed S. Lamhamedi / Mario Renaud / Isabelle Auger

    Land, Vol 10, Iss 661, p

    A New Cultural Practice to Improve the Physicochemistry of the Peat Substrate, Growth and Morphophysiological Quality of White Spruce Seedlings in Forest Nurseries

    2021  Volume 661

    Abstract: Growing Picea glauca seedlings poses many challenges for forest nursery managers, including reaching the target height at the end of the first growing season (1 + 0) and the homogeneity and uniformity of seedling growth. To increase growth and ... ...

    Abstract Growing Picea glauca seedlings poses many challenges for forest nursery managers, including reaching the target height at the end of the first growing season (1 + 0) and the homogeneity and uniformity of seedling growth. To increase growth and morphophysiological quality of white spruce seedlings (1 + 0), emphasis was placed on improving the physicochemistry of the acidic peat substrate by replacing silica with granular calcite as a covering material. The objective of our study is to compare the effects of silica and calcite on the physicochemistry of the peat substrate, as well as on growth and mineral nutrition of white spruce seedlings (1 + 0) under forest nursery conditions. Three treatments were used to cover the cavities of large white spruce seedlings produced in containers: silica (29 g/cavity; control treatment), calcite (24 g/cavity) and calcite + (31 g/cavity). At the end of the first growing season, the two calcite treatments significantly increased the total dry mass (28%), roots (27%) and shoot (29%) dry masses and height (24%) compared to silica treatments. Average calcium concentration and content of calcite treatments were significantly higher than that of silica treatment.
    Keywords Picea glauca ; peat substrate ; granular calcite ; physicochemical parameters ; growth ; logistical models ; Agriculture ; S
    Subject code 660
    Language English
    Publishing date 2021-06-01T00:00:00Z
    Publisher MDPI AG
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  8. Article ; Online: Comparison of Hydraulic and Aeration Properties of Peat Substrates Used to Produce Containerized White Spruce Seedlings (1+0) in Forest Nurseries

    Boudreault, Simon / Caron, Jean / Lamhamedi, Mohammed S. / Pepin, Steeve

    Forests. 2023 Apr. 21, v. 14, no. 4

    2023  

    Abstract: ... 005 m² s⁻¹ m⁻² s for all substrates except one) and that over-aeration reduced seedling growth under ...

    Abstract The physical properties of peat substrates from eight tree nurseries were characterized to determine bulk density, air-filled porosity, saturated hydraulic conductivity, pore effectiveness, relative gas diffusivity and chemical properties. There were significant variations among nurseries both in growth of white spruce [Picea glauca (Moench) Voss] seedlings (1+0) and substrate properties. Shoot dry mass and root collar diameter were negatively correlated with air-filled porosity and saturated hydraulic conductivity, whereas root dry mass was positively correlated with bulk density. Seedling growth increased with increasing substrate bulk density up to ~0.11 g cm⁻³, above which value conditions may become limiting to plant performance. Our results suggest that there was no growth limitation due to restricted aeration (Dₛ D₀⁻¹ > 0.005 m² s⁻¹ m⁻² s for all substrates except one) and that over-aeration reduced seedling growth under dry irrigation management.
    Keywords Picea glauca ; aeration ; bulk density ; diffusivity ; forests ; hydraulic conductivity ; irrigation management ; peat ; porosity ; root crown ; seedling growth ; trees
    Language English
    Dates of publication 2023-0421
    Publishing place Multidisciplinary Digital Publishing Institute
    Document type Article ; Online
    ZDB-ID 2527081-3
    ISSN 1999-4907
    ISSN 1999-4907
    DOI 10.3390/f14040858
    Database NAL-Catalogue (AGRICOLA)

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  9. Article: Granular Calcite Stimulates Natural Mycorrhization and Growth of White Spruce Seedlings in Peat-Based Substrates in Forest Nursery.

    Lamhamedi, Mohammed S / Renaud, Mario / Auger, Isabelle / Fortin, J André

    Microorganisms

    2020  Volume 8, Issue 7

    Abstract: The acidity of peat-based substrates used in forest nurseries limits seedling mineral nutrition and growth as well as the activity of microorganisms. To our knowledge, no study has yet evaluated the use of granular calcite as a covering material to ... ...

    Abstract The acidity of peat-based substrates used in forest nurseries limits seedling mineral nutrition and growth as well as the activity of microorganisms. To our knowledge, no study has yet evaluated the use of granular calcite as a covering material to increase pH, calcium and CO
    Language English
    Publishing date 2020-07-21
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2720891-6
    ISSN 2076-2607
    ISSN 2076-2607
    DOI 10.3390/microorganisms8071088
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  10. Article ; Online: Potential Use of Two Forest Species (Salix alba and Casuarina glauca) in the Rhizofiltration of Heavy-Metal-Contaminated Industrial Wastewater

    Bousbih, Malek / Lamhamedi, Mohammed S. / Abassi, Mejda / Khasa, Damase / Béjaoui, Zoubeir

    Forests. 2023 Mar. 22, v. 14, no. 3

    2023  

    Abstract: ... relative to controls. S. alba exhibited greater removal capacity for heavy metal ions and could be ...

    Abstract The discharge of raw industrial wastewater (IWW) into ecosystems is a major environmental problem that adversely affects water quality, soil physicochemical properties, the food chain and, therefore, human health. Injection of treated IWW into irrigation and “fertigation” systems is an ecological, sustainable and economical approach for its appropriate disposal. Seedlings of two forest species (Salix alba, Casuarina glauca) were grown hydroponically and subjected to 25% diluted IWW and control (tap water) treatments for 35 days. Morphological and physiological traits were evaluated, including leaf symptoms, stem and root dry masses, leaf water potential, relative water content, chlorophyll content, photosystem II efficiency, hydrogen peroxide, thiobarbituric acid reactive substances, bioaccumulation and translocation factor estimates and removal efficiency for various heavy metals. Application of 25% IWW stress affected many aspects of plant morphology: chlorosis and necrosis in leaves, epinasty, leaf curling, early leaf senescence and root browning. In both species, the 25% IWW treatment reduced leaf, stem and root dry masses relative to controls. S. alba exhibited greater removal capacity for heavy metal ions and could be effective as a remediator of toxic-metal-polluted industrial effluent water.
    Keywords Casuarina glauca ; Salix alba ; bioaccumulation ; chlorophyll ; chlorosis ; epinasty ; food chain ; forests ; heavy metals ; human health ; hydrogen peroxide ; hydroponics ; industrial effluents ; industrial wastewater ; irrigation ; leaf water potential ; leaves ; necrosis ; phytoremediation ; plant morphology ; soil ; tap water ; water content ; water quality
    Language English
    Dates of publication 2023-0322
    Publishing place Multidisciplinary Digital Publishing Institute
    Document type Article ; Online
    ZDB-ID 2527081-3
    ISSN 1999-4907
    ISSN 1999-4907
    DOI 10.3390/f14030654
    Database NAL-Catalogue (AGRICOLA)

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