One Year of Grassland Vegetation Dynamics in Two Sheep-Grazed Agrivoltaic Systems

Loan Madej; Catherine Picon-Cochard; Cyrille Bouhier de l'Ecluse; Christophe Cogny; Luc Michaud; Marilyn Roncoroni; David Colosse

doi:10.52825/agripv.v1i.692

Authors

Loan Madej University of Clermont Auvergne
Catherine Picon-Cochard University of Clermont Auvergne
Cyrille Bouhier de l'Ecluse PhotoSol
Christophe Cogny JPee
Luc Michaud University of Clermont Auvergne
Marilyn Roncoroni University of Clermont Auvergne
David Colosse University of Clermont Auvergne

DOI:

https://doi.org/10.52825/agripv.v1i.692

Keywords:

Biomass, Growth, Microclimate, Quality, Photovoltaic Panel, Species Number

Abstract

In agrivoltaic systems with solar fixed panels, the provision of ecosystem services by agricultural productions could be compromised due to very large changes in plant microclimate. But we still do not know properly the changes in grasslands ecosystem services. On two sheep-grazed sites located in lowland (Braize, Br) and upland (Marmanhac, Ma) grasslands of central France, we studied for one year the direct effects of various shading conditions induced by solar fixed panels on abiotic variables (light, water and soil temperature) and on vegetation (daily growth height, forage quantity and quality, number of species). Under exclosure of grazing, three treatments per site were set up, control (without solar-panel influence), inter-rows (variable influence) and panel (full influence). The results showed that light was reduced by 93% on average over the year in the shade of the panels with a cooler soil temperature of 2.6°C on Ma and 3.4°C on Br compared to the control. However, the soil moisture response varied between sites, depending on the different seasonal rainfall events and on soil texture. This resulted in 2.6 (Ma) to 3.2 (Br) times faster daily height growth and better forage quality. However, annual biomass production and species number showed no difference between the control and the panel. Only the inter-row treatment, which receives variable shading conditions throughout the day and seasons, shows variable biomass responses across sites. Experimental work will continue for several years in order to parameterise models to simulate the ecosystem services of agrivoltaic parks over the long term.

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References

E.H. Adeh, S.P. Good, M. Calaf and C.W. Higgins, “Solar pV power potential is Greatest over croplands”, Scientific reports, 9, 1-6, 2019, https://doi.org/10.1038/s41598-019-47803-3

B. Valle, T. Simonneau, F. Sourd, P. Pechier, P. Hamard, T. Frisson, M. Ryckewaert, and A. Christophe, “Increasing the total productivity of a land by combining mobile photovoltaic panels and food crops”, Applied Energy, 206, 1495–1507, 2017, https://doi.org/10.1016/j.apenergy.2017.09.113

A. C. Andrew, C. W. Higgins, M. A. Smallman, M. Graham, and S. Ates, “Herbage Yield, Lamb Growth and Foraging Behavior in Agrivoltaic Production System”, Frontiers in Sustainable Food Systems, 5, 659175, 2021, https://doi.org/10.3389/fsufs.2021.659175

A. Armstrong, N. J. Ostle, and J. Whitaker, “Solar park microclimate and vegetation management effects on grassland carbon cycling”, Environmental Research Letters, 11, no. 7, p. 074016, 2016, https://doi.org/10.1088/1748-9326/11/7/074016

E. H. Adeh, J.S. Selker, and C.W. Higgins, “Remarkable agrivoltaic influence on soil moisture, micrometeorology and water-use efficiency”, PloS one, 13(11), e0203256, 2018, https://doi.org/10.1371/journal.pone.0203256

L. Madej, C. Picon-Cochard, C. Bouhier de l’Ecluse, C. Cogny, L. Michaud, M. Roncoroni, and D. Colosse, “Dynamics of grassland vegetation in two sheep-grazed agrivoltaic systems in plain and upland areas”. Grassland Science in Europe – Grassland at the heart of circular and sustainable food systems, 27, 430-432, 2022.

A. Weselek, A. Bauerle, J. Hartung, S. Zikeli, I. Lewandowski, and P. Högy, “Agrivoltaic system impacts on microclimate and yield of different crops within an organic crop rotation in a temperate climate”, Agronomy for Sustainable Development, 41:59, 2021, https://doi.org/10.1007/s13593-021-00714-y

P.L. Peri, D.J. Moot, P. Jarvis, D.L. McNeil, and R.J. Lucas, “Morphological, Anatomical, and Physiological Changes of Orchardgrass Leaves Grown under Fluctuating Light Regimes”, Agronomy Journal, 99, 1502-1513, 2007, https://doi.org/10.2134/agronj2006.0347

M. Semchenko, M. Lepik, L. Götzenberger, K. Zobel, “Positive effect of shade on plant growth: amelioration of stress or active regulation of growth rate?” Journal of Ecology, 100, 459-466, 2012, https://doi.org/10.1111/j.1365-2745.2011.01936.x

K. Pang, J.W. Van Sambeek, N.E. Navarrete-Tindall, C.H. Lin, S. Jose, and H.E. Garrett, “Responses of legumes and grasses to non-, moderate, and dense shade in Missouri, USA. I. Forage yield and its species-level plasticity”, Agroforestry Systems, 93, 11-24, 2019, https://doi.org/10.1007/s10457-017-0067-8

H. Marrou, L. Guilioni, L. Dufour, C. Dupraz, and J. Wery, “Microclimate under agrivoltaic systems: Is crop growth rate affected in the partial shade of solar panels?” Agricultural and Forest Meteorology, 177, 117-132, 2013, https://doi.org/10.1016/j.agrformet.2013.04.012

C.L. Ballaré, “Illuminated behaviour: phytochrome as a key regulator of light foraging and plant anti-herbivore defence”, Plant, Cell & Environment, 32,v713-725, 2009, https://doi.org/10.1111/j.1365-3040.2009.01958.x

L. Seidlova, M. Verlinden, J. Gloser, A. Milbau, and I. Nijs, “Which plant traits promote growth in the low-light regimes of vegetation gaps?”, Plant Ecology, 200, 303-318, 2009, https://doi.org/10.1007/s11258-008-9454-6

W.K. Lauenroth, A.A. Wade, M.A. Williamson, B.E. Ross, S. Kumar, and D.P. Cariveau, “Uncertainty in Calculations of Net Primary Production for Grasslands”, Ecosystems, 9, 843-851, 2006, https://doi.org/10.1007/s10021-005-0072-z

D.R. Buxton, and S.L. Fales, “Plant environment and quality”, In Forage Quality, Evaluation, and Utilization, G.C. Fahey (Ed.), Chapter 4, 155-199, 1994, https://doi.org/10.2134/1994.foragequality.c4

K.D. Kephart, “Irradiance level effects on plant growth, nutritive quality, and energy exchange of C3 and C4 grasses, Retrospective Theses and Dissertations, 8551, 1987, https://lib.dr.iastate.edu/rtd/8551

K.D. Kephart and D.R. Buxton, “Forage Quality Responses of C3 and C4 Perennial Grasses to Shade’, Crop Science, 33, no. 4, 1993, https://doi.org/10.2135/cropsci1993.0011183X003300040040x

C.H. Lin, M.L. McGraw, M.F. George, and H.E. Garrett, “Nutritive quality and morphological development under partial shade of some forage species with agroforestry potential”, Agroforestry Systems, 53, no. 3, 269–281, 2001, https://doi.org/10.1023/a:1013323409839

M. Ehret, R. Graß, and M. Wachendorf, “The effect of shade and shade material on white clover/perennial ryegrass mixtures for temperate agroforestry systems”, Agroforestery Systems, 89, no. 3, 557–570, 2015, https://doi.org/10.1007/s10457-015-9791-0

N.R. Devkota, P.D. Kemp, J. Hodgson, I. Valentine, and I.K.D Jaya, “Relationship between tree canopy height and the production of pasture species in a silvopastoral system based on alder trees”, Agroforestry Systems, 76, 363-374, 2009, https://doi.org/10.1007/s10457-008-9192-8

E.M. Abraham, A.P. Kyriazopoulos, Z.M. Parissi, P. Kostopoulou, M. Karatassiou, K. Anjalanidou, and C. Katsouta, “Growth, dry matter production, phenotypic plasticity, and nutritive value of three natural populations of Dactylis glomerata L. under various shading treatments”, Agroforestry Systems, 88, 287-299, 2014, https://doi.org/10.1007/s10457-014-9682-9