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Master's Dissertation
DOI
https://doi.org/10.11606/D.11.2016.tde-04052016-102353
Document
Author
Full name
Luciana Yukie Matsubara
E-mail
Institute/School/College
Knowledge Area
Date of Defense
Published
Piracicaba, 2015
Supervisor
Committee
Magro, Teresa Cristina (President)
Andrade, Fabíola Saporiti Angerami de
Mendes, Flávio Bertin Gandara
Title in Portuguese
Protocolo experimental para avaliação do potencial de disseminação de gramíneas exóticas invasoras por animais de montaria
Keywords in Portuguese
Cavalo
Endozoocoria
Espécie invasora
Gramíneas
Abstract in Portuguese
O uso de animais de montaria em áreas naturais tem gerado grande preocupação, pois podem gerar impactos ambientais. Um dos problemas que precisa ser investigado é a relação entre animais de montaria e a presença de plantas exóticas em áreas de alto valor ecológico. Assim, o presente trabalho teve como objetivo testar um protocolo de germinação para sementes de duas espécies de gramíneas, braquiária (Urochloa decumbens) e capim gordura (Melinis minutiflora) que passaram pelo trato digestório de cavalos. As sementes foram ofertadas aos animais junto com a ração com posterior coleta das fezes. No experimento foram realizados três tratamento. No tratamento "braquiária" foram ofertadas sementes de Urochloa decumbens, no tratamento "capim gordura" foram ofertadas sementes de Melinis minutiflora e o "sem tratamento" foi ofertada apenas a ração. Parte das sementes foram retiradas das fezes e submetidas a testes de germinação e o material restante foi utilizado para testar a capacidade germinativa das sementes diretamente nas fezes em um ambiente controlado. Na germinadora verificou-se que as sementes que passaram pelo trato digestório dos cavalos tiveram uma menor taxa de germinação comparadas com as sementes com tratamento de quebra de dormência. No tratamento feito em casa de vegetação as sementes que foram retiradas das fezes e que germinaram foram identificadas. Não houve diferença na taxa de germinação entre os cavalos, o que ocorreu entre os tratamentos. No tratamento braquiária predominou a germinação de Urochloa decumbens, no tratamento capim gordura a maior taxa de germinação de Melinis minutiflora e no sem tratamento predominou o nascimento de outras espécies. As sementes estudas tem potencial de germinar, crescer e frutificar, porém não se sabe se as espécies podem formar uma população capaz de colonizar novas áreas.
Title in English
Experimental protocol for the assessment of the potential spread of invasive exotic grasses for riding animals
Keywords in English
Endozoochory
Grasses
Horse
Invasive species
Abstract in English
The use of riding animals in natural areas has caused great concern because their use cause environmental impacts. One of the problems that needs to be investigated is the relationship between the use of riding animals and the presence of exotic plants in natural areas. This study aimed to test a germination protocol for the of two species Urochloa decumbens and Melinis minutiflora that has passed through the digestive tract of the horse. The seeds were offered to horses and their feces were collected. Tree treatments were set, in "braquiaria" treatment seeds Urochloa decumbens were offered to the horses, in the "capim gordura" treatment seeds of Melinis minutiflora offered and the untreated were offered only horse food. Part of the seeds were removed from the feces and undergo germination test and the remain of the feces were used to test in a green house. The germination rate of the seed from de horse dung was lower than germination rate of the dormancy breaking treatment seeds. The seeds that germinate on the greenhouse were identified. There were no difference between the germination rate between treatments, but there was between species in braquiaria treatment predominated the germination of Urochloa decumbens in the grass fat treatment most Melinis minutiflora germination rate and the untreated predominated the germination of other species. Seeds from horse dung has the potential to germinate, grow and bear fruit, but it is not known if this species can form a population able to colonize new areas.
 
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Publishing Date
2016-05-09
 
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