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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

How does leaf physiological acclimation impact forage production and quality of a warmed managed pasture of Stylosanthes capitata under different conditions of soil water availability?

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Author(s):
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Habermann, Eduardo [1] ; Dias de Oliveira, Eduardo A. [2] ; Delvecchio, Gustavo [1] ; Belisario, Rafael [1] ; Barreto, Rafael Ferreira [3] ; Viciedo, Dilier Olivera [3] ; Rossingnoli, Nadia Oliveira [1] ; de Pinho Costa, Katia Aparecida [4] ; Prado, Renato de Mello [3] ; Gonzalez-Meler, Miquel [2] ; Martinez, Carlos Alberto [1]
Total Authors: 11
Affiliation:
[1] Univ Sao Paulo, Dept Biol, FFCLRP, Ribeirao Preto, SP - Brazil
[2] Univ Illinois, Dept Biol Sci, Ecol & Evolut, Chicago, IL 60680 - USA
[3] Sao Paulo State Univ, Sch Agr & Veterinarian Sci, Dept Soils & Fertilizers, Jaboticabal, SP - Brazil
[4] Fed Inst Goiano, Rio Verde Campus, Rio Verde, Go - Brazil
Total Affiliations: 4
Document type: Journal article
Source: Science of The Total Environment; v. 759, MAR 10 2021.
Web of Science Citations: 0
Abstract

Tropical pastures play a significant role in the global carbon cycle and are crucial for world livestock production. Despite its importance, there is a paucity of field studies that clarify how tropical pasture species will be affected by environmental changes predicted for tropical regions. Using a temperature-free air-controlled enhancement (T-FACE) system, we increased canopy temperature (+2 degrees C over ambient) and evaluated the effects of warming under two soil moisture conditions in a factorial design over the physiology, forage production, and forage quality of a tropical forage legume, Stylosanthes capitata. Under well-watered conditions, warming increased the PSII efficiency, net photosynthesis, and aboveground biomass accumulation, but reduced forage quality and digestibility by decreasing crude protein content and increasing lignin content. Non-irrigated conditions under ambient temperature reduced leaf water status presumably promoting the reduction in net photosynthesis, forage production, and forage quality and digestibility. Under the combination of canopy warming and non-irrigated conditions, warming mitigated the effects of reduced soil moisture on leaf photosynthesis and biomass production, but a significant interaction reduced forage quality and digestibility more than under isolated treatments of warming or non-irrigated conditions. We found a potential physiological acclimation of the tropical forage species to moderate warming when grown under rainfed or well-watered conditions. However, this acclimation was achieved due to a trade-off that reduced forage nutritional value and digestibility that may impact future animal feeding, livestock production, and would contribute to methane emissions. (C) 2020 Elsevier B.V. All rights reserved. (AU)

FAPESP's process: 16/12853-6 - Impact of increased temperature and water deficit in future climate simulation on the physiological and productive performance of two tropical forage species
Grantee:Gustavo Delvecchio
Support type: Scholarships in Brazil - Scientific Initiation
FAPESP's process: 16/09742-8 - Water relations, gas exchange, leaf anatomy and thermographic analysis of two forage species under warming and drought stress at field conditions
Grantee:Eduardo Habermann
Support type: Scholarships in Brazil - Doctorate
FAPESP's process: 08/58075-8 - Miniface climate-change impact experiment to analyze the effects of elevated CO2 and warming on photosynthesis, gene expression, biochemistry, growth, nutrient dynamics and yield of two contrasting tropical forage species
Grantee:Carlos Alberto Martinez y Huaman
Support type: Research Program on Global Climate Change - Thematic Grants