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Hernandez Velasco, MarcoORCID iD iconorcid.org/0000-0001-6805-2112
Publications (10 of 16) Show all publications
Hernandez Velasco, M. & Mattsson, A. (2019). Light quality and intensity of light-emitting diodes during pre-cultivation of Picea abies (L.) Karst. and Pinus sylvestris L. seedlings - impact on growth performance, seedling quality and energy consumption. Scandinavian Journal of Forest Research, 34(3), 159-177
Open this publication in new window or tab >>Light quality and intensity of light-emitting diodes during pre-cultivation of Picea abies (L.) Karst. and Pinus sylvestris L. seedlings - impact on growth performance, seedling quality and energy consumption
2019 (English)In: Scandinavian Journal of Forest Research, ISSN 0282-7581, E-ISSN 1651-1891, Vol. 34, no 3, p. 159-177Article in journal (Refereed) Published
Abstract [en]

Three different LED lamps with continuous spectra were compared against commonly used fluorescent lights. The lamps were characterized by light output, energy consumption and spectral quality for plant growth. The biological effects of light quality were compared by pre-cultivating seedlings of Picea abies (L.) Karst. and Pinus sylvestris L. under each spectrum for 35 days in a growth chamber with controlled temperature, humidity and photoperiod. The seedlings were then transplanted and cultivated for one vegetation period at the nursery, then planted outdoors on a forest field trial and followed for three years. The seedlings showed similar growth performance for all spectra tested. LED lamps have several advantages to fluorescent light such as energy consumption, longer life span and adjustable light intensity. Regarding light intensity the effects on growth performance were studied for both species using the most promising LED spectra. The photosynthetically active radiation (PAR) was maintained at 50, 100, 200 and 400 mu mol m(-2) s(-1). Unlike energy consumption, seedling development did not display a linear relationship to light intensity. Instead, the results show an optimum light level between 100 and 200 mu mol m(-2) s(-1) for the shade tolerant Picea abies seedlings and a level of around 200 mu mol m(-2) s(-1) for the more shade intolerant Pinus sylvestris seedlings.

Place, publisher, year, edition, pages
Taylor & Francis, 2019
Keywords
Cultivation under LED lamps, growth performance and quality of forest seedlings, light quality, light intensity, energy consumption
National Category
Biological Sciences
Research subject
Energy, Forests and Built Environments
Identifiers
urn:nbn:se:du-29621 (URN)10.1080/02827581.2019.1578404 (DOI)000459142200001 ()
Available from: 2019-03-07 Created: 2019-03-07 Last updated: 2019-03-07Bibliographically approved
Hernandez Velasco, M. & Mattsson, A. (2016). Swedish experiences and visions on the production of containerized seedlings. In: Palle Madsen (Ed.), : . Paper presented at Udviklingskonference: Dækrodsplanter; Skovskolen i Nødebo, 9 March 2016.
Open this publication in new window or tab >>Swedish experiences and visions on the production of containerized seedlings
2016 (English)In: / [ed] Palle Madsen, 2016Conference paper, Oral presentation only (Other academic)
National Category
Forest Science
Research subject
Energy, Forests and Built Environments, Zephyr, EU projekt inom 7:e ramprogrammet, europeiskt samverkansprojekt för utveckling av ny energisnål och miljövänlig teknik för produktion av skogsplantor
Identifiers
urn:nbn:se:du-21399 (URN)
Conference
Udviklingskonference: Dækrodsplanter; Skovskolen i Nødebo, 9 March 2016
Funder
EU, FP7, Seventh Framework Programme, 308313
Available from: 2016-05-02 Created: 2016-05-02 Last updated: 2016-05-20Bibliographically approved
Hernandez Velasco, M., Pérez-Mora, N. & Marras, T. (2016). Using Hybrid Solar Photovoltaic + Combined Heat and Power Systems (PV+CHP) to Enable Industrial Scale Indoor Plant Cultivation: a Feasibility Study. In: : . Paper presented at 11th ISES EuroSun Conference, Mallorca, Spain; 14 October 11-14, 2016.
Open this publication in new window or tab >>Using Hybrid Solar Photovoltaic + Combined Heat and Power Systems (PV+CHP) to Enable Industrial Scale Indoor Plant Cultivation: a Feasibility Study
2016 (English)Conference paper, Oral presentation only (Other academic)
Abstract [en]

A rapid population growth linked to intensive agriculture has originated several problems such as soil degradation, groundwater depletion, forestland transformation, and eutrophication of aquatic systems. Vertical farming offers an alternative for producing plants indoors in a resources and space efficient manner, reducing leakage of chemicals, optimizing water and land use, and allowing year-round cultivation. Controlled environment agriculture (CEA) also enables urban residents to access locally grown plants that would have otherwise been imported from far away, reducing transport and storage emissions. This comes with a caveat: the energy loads increase to provide artificial illumination and keep an optimal climate. To address this issue, the present work studies the feasibility of using a hybrid photovoltaics and combined heat and power system (PV+CHP) to satisfy the energy demands of an industrial-sized growth room. For this, different European locations and climates have been considered as well as various growth protocols.

Keywords
PV+CHP; Solar-powered growth rooms; Controlled-environment agriculture; Vertical farming
National Category
Energy Systems Forest Science
Research subject
Energy, Forests and Built Environments
Identifiers
urn:nbn:se:du-23475 (URN)
Conference
11th ISES EuroSun Conference, Mallorca, Spain; 14 October 11-14, 2016
Available from: 2016-11-25 Created: 2016-11-25 Last updated: 2016-11-28Bibliographically approved
Chiatante, D., Radoglou, K., Sismanis, N., Smirnakou, S., Mattsson, A., Hernandez Velasco, M., . . . Ferreira, R. (2015). ZEPHYR Project – Deliverable D3.3: Final report on growth tests and biological validation.
Open this publication in new window or tab >>ZEPHYR Project – Deliverable D3.3: Final report on growth tests and biological validation
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2015 (English)Report (Other academic)
National Category
Forest Science
Research subject
Energy, Forests and Built Environments, Zephyr, EU projekt inom 7:e ramprogrammet, europeiskt samverkansprojekt för utveckling av ny energisnål och miljövänlig teknik för produktion av skogsplantor
Identifiers
urn:nbn:se:du-21403 (URN)
Projects
Zephyr Project
Funder
EU, FP7, Seventh Framework Programme, 308313
Available from: 2016-05-02 Created: 2016-05-02 Last updated: 2016-05-03Bibliographically approved
Mattsson, A., Hernandez Velasco, M., Rusu, C., Pietrzak, M., Ferreira, R., Radoglou, K., . . . Kotilainen, T. (2015). ZEPHYR Project – Deliverable D7.6: Articles and peer-reviewed papers.
Open this publication in new window or tab >>ZEPHYR Project – Deliverable D7.6: Articles and peer-reviewed papers
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2015 (English)Report (Other (popular science, discussion, etc.))
National Category
Forest Science Energy Systems
Research subject
Energy, Forests and Built Environments, Zephyr, EU projekt inom 7:e ramprogrammet, europeiskt samverkansprojekt för utveckling av ny energisnål och miljövänlig teknik för produktion av skogsplantor
Identifiers
urn:nbn:se:du-21404 (URN)
Projects
Zephyr Project
Funder
EU, FP7, Seventh Framework Programme, 308313
Available from: 2016-05-02 Created: 2016-05-02 Last updated: 2016-11-24Bibliographically approved
Hernandez Velasco, M. & Mattsson, A. (2014). A silvicultural practice to facilitate forest restoration: a new seedling cultivation technology for regeneration establishment. In: John A. Parrotta, Cynthia F. Moser, Amy J. Scherzer, Nancy E. Koerth and Daryl R. Lederle (Ed.), The International Forestry Review Vol.16 (5), 2014: . Paper presented at Sustaining Forests, Sustaining People: The Role of Research. XXIV IUFRO World Congress, 5-11 October 2014, Salt Lake City, USA (pp. 129). The Commonwealth Forestry Association, www.cfa-international.org, 16(5)
Open this publication in new window or tab >>A silvicultural practice to facilitate forest restoration: a new seedling cultivation technology for regeneration establishment
2014 (English)In: The International Forestry Review Vol.16 (5), 2014 / [ed] John A. Parrotta, Cynthia F. Moser, Amy J. Scherzer, Nancy E. Koerth and Daryl R. Lederle, The Commonwealth Forestry Association, www.cfa-international.org , 2014, Vol. 16, no 5, p. 129-Conference paper, Poster (with or without abstract) (Other academic)
Abstract [en]

Forest restoration has become a primary task, not only to cope with an increasing demand on forest products, but also to fi ghtclimate change and compensate for an accelerated global deforestation. However, many of the current practices used in forestrynurseries to produce forest planting stock have adverse effects on the environment. The main objective of the ZEPHYR project,funded by the European Commission under the Seventh Framework Programme (FP7), is to develop an innovative zero-impacttechnology for the pre-cultivation of forest regeneration materials that is not affected by the outdoor climate. Among the maincomponents to be improved are artifi cial lighting sources used for cultivation. Traditional fl uorescence lamps are to be replacedby LED grow lights with spectra tailored to the seedlings’ needs. The present work investigates biological responses of Piceaabies and Pinus sylvestris to six different light spectra. The pre-cultivation has been done following standard growth protocolsduring 5 weeks with a photoperiod of 16 h at 100 μmol/m2/s. This has been done under controlled closed conditions with a roomtemperature of 20 °C and a relative humidity of 60%. The analyses have shown clear differences among the treatments and theiradapting capacity when transplanted.

Place, publisher, year, edition, pages
The Commonwealth Forestry Association, www.cfa-international.org, 2014
Keywords
Forest restoration, LED grow lights, nursery production, containerized planting stock
National Category
Forest Science
Research subject
Energy, Forests and Built Environments, Zephyr, EU projekt inom 7:e ramprogrammet, europeiskt samverkansprojekt för utveckling av ny energisnål och miljövänlig teknik för produktion av skogsplantor
Identifiers
urn:nbn:se:du-16433 (URN)
Conference
Sustaining Forests, Sustaining People: The Role of Research. XXIV IUFRO World Congress, 5-11 October 2014, Salt Lake City, USA
Funder
EU, FP7, Seventh Framework Programme, 308313
Available from: 2014-11-20 Created: 2014-11-20 Last updated: 2016-05-03Bibliographically approved
Hernandez Velasco, M. & Mattsson, A. (2014). Cultivation of forest regeneration materials under artificial radiant sources—effects of light intensity on energy consumptionand seedling development. In: John A. Parrotta, Cynthia F. Moser, Amy J. Scherzer, Nancy E. Koerth and Daryl R. Lederle (Ed.), The International Forestry Review Vol.16 (5), 2014: . Paper presented at Sustaining Forests, Sustaining People: The Role of Research. XXIV IUFRO World Congress, 5-11 October 2014, Salt Lake City, USA (pp. 300-300). , 16(5)
Open this publication in new window or tab >>Cultivation of forest regeneration materials under artificial radiant sources—effects of light intensity on energy consumptionand seedling development
2014 (English)In: The International Forestry Review Vol.16 (5), 2014 / [ed] John A. Parrotta, Cynthia F. Moser, Amy J. Scherzer, Nancy E. Koerth and Daryl R. Lederle, 2014, Vol. 16, no 5, p. 300-300Conference paper, Poster (with or without abstract) (Other academic)
Abstract [en]

In times of major environmental challenges and increasing demand for forest products, planted forests have acknowledgedadvantages compared to other land uses. Despite not being able to completely take the place of natural forests, planted ones have,if properly managed, great potential to contribute in addressing these problems. Besides the ecological benefi ts such as carbonsequestration, planted forests can help meet the demand for wood products without further depletion of the natural forest. Forestrestoration, rehabilitation, and reforestation are limited by the capacity for producing forest regeneration materials. Often, asproduction is intensifi ed at forest nurseries, the practices begin to have an adverse impact on the environment and stop being trulysustainable. One of the main issues in nurseries is the energy consumption for grow lights during periods of short daylight.By using high-effi ciency LED grow lamps and adjusting the light intensity, this study aimed to reduce the energy consumptionfrom lighting per seedling without compromising seedling development. The precultivation of Picea abies and Pinus sylvestrisseedlings was done during 5 weeks under controlled conditions at 20 °C and a relative humidity of 60%. The photoperiod was16 hours at an intensity ranging from 50 to 350 μmol/m2/s in intervals of 50 μmol/m2/s intervals.

Keywords
Containerized planting stock production, LED grow lights, Picea abies, Pinus sylvestris, energy consumption
National Category
Forest Science Energy Systems
Research subject
Energy, Forests and Built Environments, Zephyr, EU projekt inom 7:e ramprogrammet, europeiskt samverkansprojekt för utveckling av ny energisnål och miljövänlig teknik för produktion av skogsplantor
Identifiers
urn:nbn:se:du-16434 (URN)
Conference
Sustaining Forests, Sustaining People: The Role of Research. XXIV IUFRO World Congress, 5-11 October 2014, Salt Lake City, USA
Available from: 2014-11-20 Created: 2014-11-20 Last updated: 2016-05-03Bibliographically approved
Hernandez Velasco, M. & Mattsson, A. (2014). Energy efficiency in intensified production of forest regeneration materials – design of a photovoltaic system for sustainably powering an innovative forestry incubator. In: John A. Parrotta, Cynthia F. Moser, Amy J. Scherzer, Nancy E. Koerth and Daryl R. Lederle (Ed.), The International Forestry Review Vol.16 (5), 2014: . Paper presented at Sustaining Forests, Sustaining People: The Role of Research. XXIV IUFRO World Congress, 5-11 October 2014, Salt Lake City, USA (pp. 393-393). , 16(5)
Open this publication in new window or tab >>Energy efficiency in intensified production of forest regeneration materials – design of a photovoltaic system for sustainably powering an innovative forestry incubator
2014 (English)In: The International Forestry Review Vol.16 (5), 2014 / [ed] John A. Parrotta, Cynthia F. Moser, Amy J. Scherzer, Nancy E. Koerth and Daryl R. Lederle, 2014, Vol. 16, no 5, p. 393-393Conference paper, Poster (with or without abstract) (Other academic)
Abstract [en]

Planted forests can contribute addressing problems of global concern such as climate change mitigation, biodiversity lost and pressure on ecosystems due to high demand of forestry products. However, in order to be able to profit from these benefits sustainably, production rates of forest regeneration materials should be higher than the harvesting rates. Nevertheless, intensive production methods often bring along adverse consequences for the environment. In the frame of the ZEPHYR project, funded by the European Commission under the Seventh Framework Programme (FP7), innovative and cost-friendly technologies for the pre-cultivation are being developed. They will be integrated into a functional and transportable system for a large scale production of seedlings, with zero-impact on the environment and not affected by outdoor conditions. To achieve this, high efficiency devices with low energy consumption will be used and the incubator will be powered by solar energy. This work aims to present the efforts made to reduce the energy loads and optimize the photovoltaic (PV) system. The power system will also be capable of connecting to the electricity grid, using a diesel generator as a back-up, and a battery bank with at least one day of autonomy (up to 7 kWh/day) in central European latitudes.   

Keywords
Planted forest, photovoltaic system, climate change mitigation, incubator, forest regeneration materials
National Category
Forest Science Energy Systems
Research subject
Energy, Forests and Built Environments, Zephyr, EU projekt inom 7:e ramprogrammet, europeiskt samverkansprojekt för utveckling av ny energisnål och miljövänlig teknik för produktion av skogsplantor
Identifiers
urn:nbn:se:du-16436 (URN)
Conference
Sustaining Forests, Sustaining People: The Role of Research. XXIV IUFRO World Congress, 5-11 October 2014, Salt Lake City, USA
Funder
EU, FP7, Seventh Framework Programme, 308313
Available from: 2014-11-20 Created: 2014-11-20 Last updated: 2016-05-03Bibliographically approved
Hernandez Velasco, M. & Mattsson, A. (2014). Long night treatment for induction of cold hardiness using artificial lights: effects of photoperiod on seedling storabilityand energy consumption. In: John A. Parrotta, Cynthia F. Moser, Amy J. Scherzer, Nancy E. Koerth and Daryl R. Lederle (Ed.), The International Forestry Review Vol.16 (5), 2014: . Paper presented at Sustaining Forests, Sustaining People: The Role of Research. XXIV IUFRO World Congress, 5-11 October 2014, Salt Lake City, USA (pp. 379-379). , 16(5)
Open this publication in new window or tab >>Long night treatment for induction of cold hardiness using artificial lights: effects of photoperiod on seedling storabilityand energy consumption
2014 (English)In: The International Forestry Review Vol.16 (5), 2014 / [ed] John A. Parrotta, Cynthia F. Moser, Amy J. Scherzer, Nancy E. Koerth and Daryl R. Lederle, 2014, Vol. 16, no 5, p. 379-379Conference paper, Poster (with or without abstract) (Other academic)
Abstract [en]

Human-assisted forest regeneration in Nordic climates is considerably limited by the harsh outdoor conditions. There is onlya small open window of time during the summer when the weather is favorable for transplantation and establishment ofpre-cultivated seedlings in open land. Greenhouses and modern growth chambers help to cope with this limitation by allowingyear-round seedling cultivation. Nonetheless, production levels are constrained to the cold storage capacity during the nontransplantingseason. This storage is in turn dependent on the ability of the conifer to adapt to freezing temperatures and withstand theoverall stress associated with cold hardening. Long night treatments can induce dormancy with cessation of growth and terminalbuds initiation, leading to a better cold resistance. When growing forest regeneration materials under artifi cial lights, the lengthsof the long night treatment and the photoperiod will have a signifi cant impact not only on the biological response of the seedlingsbut also on the energy consumption, and thus on the CO2 emissions. The aim of this work was to explore different long nighttreatment regimes for induction of cold hardiness in Picea abies and Pinus sylvestris seedlings using artifi cial lights. This wasdone with the purpose of studying the relationship between the energy consumption and the biological responses.

Keywords
Forest restoration, LED grow lights, forest nurseries, long-night treatment, cold hardiness
National Category
Forest Science
Research subject
Energy, Forests and Built Environments, Zephyr, EU projekt inom 7:e ramprogrammet, europeiskt samverkansprojekt för utveckling av ny energisnål och miljövänlig teknik för produktion av skogsplantor
Identifiers
urn:nbn:se:du-16435 (URN)
Conference
Sustaining Forests, Sustaining People: The Role of Research. XXIV IUFRO World Congress, 5-11 October 2014, Salt Lake City, USA
Available from: 2014-11-20 Created: 2014-11-20 Last updated: 2016-05-03Bibliographically approved
Hernandez Velasco, M. & Kotilainen, T. (2014). New technology for pre-cultivation of forest seedlings under LED lamps – modification of light conditions to mitigate light shock stress after transplanting to open land. In: 2nd Restoring Forests Conference Abstracts: . Paper presented at 2nd Restoring Forests Conference. 13-16 October 2014, Lafayette, Indiana, USA.
Open this publication in new window or tab >>New technology for pre-cultivation of forest seedlings under LED lamps – modification of light conditions to mitigate light shock stress after transplanting to open land
2014 (English)In: 2nd Restoring Forests Conference Abstracts, 2014Conference paper, Oral presentation with published abstract (Other academic)
Abstract [en]

Forest restoration aims to cope with the increasing demand on forest products, as well as an aid in fighting climate change and compensating for accelerated deforestation. Funded by the European Commission under the Seventh Framework Program (FP7), the Zephyr project aims to introduce a zero-impact incubator for the pre-cultivation of forest regeneration materials. The consortium, involving 14 organizations of 10 different European countries, is developing innovative and cost-efficient technologies that will allow the production of standardized high quality forest seedlings ready to be transplanted. The technologies will be integrated into a functional and transportable unit not affected by the outdoor conditions and producing minimal emissions. To achieve this, the system will be powered mainly by solar energy and will recycle the water used. Specifically developed devices such as wireless sensors and LED lamps will be used to monitor and enhance the cultivation process, reduce the energy consumption and decrease the overall cost due to their high efficiency, long lifetime and low maintenance.

The LED grow lights used have a continuous spectrum that has been selected and specifically tailored to the plants’ needs. Nevertheless, seedlings pre-cultivated under LED lights could face UV stress after transplanting to open land as these wavelengths are not included in the light spectrum used in the growth chamber. Moreover, light intensity levels during indoor cultivation are usually much lower compared to the outdoor conditions, which can cause a light shock to the plants. Juvenile plants are less efficient in the utilization of the absorbed light, and therefore, prone to photoinhibition by radiation fluxes that usually do not harm mature plants. Plant protective mechanisms against UV radiation and high PAR (400-700nm) light intensity are partly overlapping. Hence, exposure to UV or high light intensity before transplanting, or introducing a transient phase by using shading cloths during transplantation period could help to reduce this stress.

The aim was to reduce the transplanting stress of Picea abies and Pinus sylvestris seedlings grown under LED-lamps for the first 5 weeks of cultivation. We investigated how different methods; UV-A pre-treatment or high irradiance during the indoor cultivation or usage of shading cloths for the first week(s) after transplanting outdoors can be used to mitigate light shock stress. Different methods and exposure times showed varying ability in ensuring good seedling growth and survival.

Keywords
LED growth lights, forest nurseries, light shock, transplanting stress
National Category
Forest Science
Research subject
Energy, Forests and Built Environments, Zephyr, EU projekt inom 7:e ramprogrammet, europeiskt samverkansprojekt för utveckling av ny energisnål och miljövänlig teknik för produktion av skogsplantor
Identifiers
urn:nbn:se:du-16437 (URN)
Conference
2nd Restoring Forests Conference. 13-16 October 2014, Lafayette, Indiana, USA
Funder
EU, FP7, Seventh Framework Programme, 308313
Available from: 2014-11-20 Created: 2014-11-20 Last updated: 2016-05-03Bibliographically approved
Organisations
Identifiers
ORCID iD: ORCID iD iconorcid.org/0000-0001-6805-2112

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