%0 Journal Article
%T DANOS MEC NICOS OCASIONADOS POR SISTEMAS DOSADORES DE SEMENTES MECHANICAL DAMAGE CAUSED BY SEED METERING SYSTEMS
%A Rog¨¦rio de Ara¨²jo Almeida
%A Luiz Carlos Barcellos
%A Paulo Alcanfor Ximenes
%J Pesquisa Agropecu¨¢ria Tropical
%D 2007
%I Scientific Electronic Library Online
%R 10.5216/pat.v33i1.2391
%X Avaliaram-se os efeitos de danos mecanicos ocasionados por cinco sistemas dosadores de sementes, em quatro culturas. Amostras das sementes foram coletadas antes e ap¨®s passarem pelos sistemas dosadores e foram submetidas a testes de pureza, germina  o e vigor. N o houve diferen a entre os efeitos de danos mecanicos ocasionados pelos sistemas dosadores empregados nas sementes de milho. Para as sementes de feij o, menores efeitos foram verificados quando da utiliza  o dos dosadores pneum¨¢tico a v¨¢cuo e copo dosador. O sistema rotor acanalado causou menores danos ¨¤s sementes de arroz e os sistemas disco  horizontal perfurado e copo dosador foram os que menos danificaram as sementes de soja. O sistema dosador pneum¨¢tico a v¨¢cuo ocasionou o maior ¨ªndice de dano mecanico nas sementes de soja. PALAVRAS-CHAVE: Semeadoras; distribuidores de sementes; rotor acanalado. Effects of mechanical damage caused by five seed metering systems were evaluated in four crops. Seed samples were collected before and after passing through the measuring systems and submitted to tests of purity, germination and vigor. There was no difference in the level of mechanical damage caused by the metering systems used for maize seeds. For common bean seeds, minor effects were verified when using the vacuum metering disk and the feed cup. The fluted feed system showed the best performance for rice seeds, and the horizontal perforated disk and feed cup systems exhibited the best results for soybean seeds. The vacuum metering disk system caused the highest level of mechanical damage to soybean seeds. KEY-WORDS: Planter machine; seed distributor; fluted feed.
%K Semeadoras
%K distribuidores de sementes
%K rotor acanalado
%U http://www.revistas.ufg.br/index.php/pat/article/view/2391