Evaluation of Megathyrsus maximus genotypes under water stress conditions
Acta sci., Anim. sci
; 44: e54975, 2022. tab, graf
Article
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| ID: biblio-1370322
Biblioteca responsável:
BR68.1
ABSTRACT
The objective was to evaluate the production of Megathyrsus maximusgenotypes (Syn. Panicum maximum), under different levels of water in the soil. This was a 5x5 factorial completely randomized design conducted in a greenhouse, combining five genotypes of M. maximus(B55, C10 and PM30, cv. Massai and cv. BRS Tamani) and five levels of soil field capacities (20%, 40%, 60%, 100% and 140%), with three replications. Dry matter production was evaluated leaf, stem, dead material, root, shoot and total dry matters, as well as the number of tillers and leafstem and abovegroundroot ratios. The qualitative factor (genotypes) was subjected to Duncan test at 5% probability. The quantitative factor (% field capacity) was subjected to regression, adopting 5% as a critical level of probability. There was no interaction between the factors for any of the evaluated characteristics. Significant differences amongthe genotypes were detected for tiller number, dead material dry mass, root and total dry mass and leafstem ratio. There was no significant effect of the percentage of field capacity on most of the characteristics, except for leafstem and abovegroundroot ratios. Cultivar Massai showed the best forage production compared to the other genotypes, regardless of the percentage of field capacity evaluated. In general, the evaluated genotypes were more tolerant to excess water stress than to water deficit.(AU)
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Base de dados:
VETINDEX
Assunto principal:
Desidratação
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Inundações
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Genótipo
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Panicum
Idioma:
En
Revista:
Acta sci., Anim. sci
Ano de publicação:
2022
Tipo de documento:
Article