Data/hora: 05/06/2024 13:57:30

Biblioteca(s): | Embrapa Acre; Embrapa Gado de Corte.
Data corrente: | 09/10/2018
Data da última atualização: | 17/12/2018
Autoria: | ASSIS, G. M. L. de; BEBER, P. M.; MIQUELONI, D. P.; RESENDE, R. M. S.
Afiliação: | GISELLE MARIANO LESSA DE ASSIS, CPAF-AC; Paulo M. Beber, Universidade Federal do Acre - UFAC; Daniela P. Miqueloni, Universidade Federal do Acre - UFAC; ROSANGELA MARIA SIMEAO, CNPGC.
Título: | Identification of stylo lines with potential to compose mixed pastures with higher productivity.
Ano de publicação: | 2018
Fonte/Imprenta: | Grass Forage Science, v. 73, p. 897-906, 2018.
DOI: | 10.1111/gfs.12383
Idioma: | Inglês

Conteúdo:

Forage legumes from the genus Stylosanthes are frequently used as pasture cover crops with positive effects in controlling weeds, soil fertility and crop yield while providing livestock feed and additional income for farmers through seed production.
Stylosanthes guianensis is native to South America and extensively grown worldwide. Therefore, efforts to improve this species may help the sustainability of livestock production in pasture areas managed with this legume. We evaluated 12 sister lines
spread through seeds under clippings in the western Amazon region, Brazil. The results were analysed using the methodology of mixed models. Five sister lines mixed with the grass Brachiaria brizantha were evaluated under continuous grazing
for two consecutive years. We estimated the genetic and phenotypic parameters of the forage legume and then identified and validated, under grazing, the sister lines most promising to be used in an area of the western Brazilian Amazon. Total drymatter
yield, soil coverage, height before clipping, height after clipping and seed production showed low&#8208;to&#8208;moderate broad&#8208;sense heritability (0.1?0.5), contrasting with reduced genetic variability for the characters associated with nutritive value. The S. guianensis lines had, on average, 278 g/kg of crude protein in the dry matter of the leaves and 200 g/kg in the stems, suggesting that the use of this species may help to overcome the low protein content of tropical pastures. There are promising stylo lines that can be used in mixed pastures in humid tropical regions.

Palavras-Chave: | Acre; Amazonia Occidental; Amazônia Ocidental; Embrapa Acre; Fazenda Manjerona; Fitomejoramiento; Ganado de carne; Leguminosas forrajeras; Nutrición animal; Pastoreo mixto; Pastos forrajeros; Raza de bovinos Nelore; Rendimiento de los cultivos; Rio Branco (AC); Senador Guiomard (AC); Tropical; Variación genética; Western Amazon.
Thesagro: | Brachiaria Brizantha; Campo Experimental; Capim Brachiaria; Características Agronômicas; Estilosante; Gado de Corte; Gado Nelore; Gramínea Forrageira; Leguminosa Forrageira; Melhoramento Genético Vegetal; Nutrição Animal; Pastagem Consorciada; Produtividade; Stylosanthes Guianensis; Variação Genética.
Thesaurus Nal: | Agronomic traits; Animal nutrition; Beef cattle; Chemical composition; Crop yield; Forage grasses; Forage legumes; Forage production; Genetic variation; Legumes; Mixed grazing; Nellore; Plant breeding; Urochloa brizantha.

Categoria do assunto:

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G Melhoramento Genético

Registro original: | Embrapa Gado de Corte (CNPGC)

Exemplares:

CPAF-AC - (26692-1) - UPC - AP - DD -  -  -  - DIS
CNPGC - (17184-1) - UPC - AP - DD -  -  -  - DIS