Shade effects on the hybrid Mavuno brachiariagrass (Urochloa spp.) as potential grass in agroforestry systems

The goal of this study was to evaluate the morphogenetic, physiology, and forage mass characteristics of Mavuno brachiariagrass ( Urochloa brizantha  ×  Urochloa ruziziensis ) under shading. The experiment was analyzed as split-plot. Whole plots were two growing seasons (spring/summer and fall/winte...

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Bibliographic Details
Published in:Agroforestry systems 2021-08, Vol.95 (6), p.1105-1108
Main Authors: da Cruz, Priscila Júnia Rodrigues, Borges, Claudia Eduarda, Santos, Márcia Vitória, Magalhães, Marcela Azevedo, Martuscello, Janaína Azevedo, da Fonseca, Dilermando Miranda, da Silva, Leandro Diego
Format: Article
Language:English
Subjects:
Agriculture
Agroforestry
Biomedical and Life Sciences
Canopies
Chlorophyll
Elongation
Forage
Forestry
Grasses
Leaves
Life Sciences
Photosynthesis
Physiology
Radiation
Seasons
Shade
Shading
Spring (season)
Stems
Summer
Winter
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Summary:The goal of this study was to evaluate the morphogenetic, physiology, and forage mass characteristics of Mavuno brachiariagrass ( Urochloa brizantha  ×  Urochloa ruziziensis ) under shading. The experiment was analyzed as split-plot. Whole plots were two growing seasons (spring/summer and fall/winter) and the subplots were shade levels (0, 30, 45, and 73%). There is a linear positive effect of shade on leaf elongation rate, leaf blade lengths, canopy height, chlorophyll indices, leaf percentage, and leaf to stem ratio. Shade linearly decreased stem and inflorescence percentages and tillers number. There was a quadratic effect of shade on growing cycle length, forage mass, and photosynthesis. Regarding to seasons, spring/summer presented higher rates of leaf appearance, leaf elongation, and stem elongation compared to fall/winter. In conclusion, Mavuno brachiariagrass harvested at 95% LI presents great adaptation to shading of 30%, without impairing the forage mass although increasing leaf size, chlorophyll indices, and canopy height.
ISSN:0167-4366
1572-9680
DOI:10.1007/s10457-021-00636-4