Consulta: creatorFacets:"Santos,S.A."
Registros recuperados: 7
Data/hora: 02/06/2024 10:35:05

Phytosociological surveys: tools for weed science?
Provedor de dados: 87
Autores: Concenço,G.; Tomazi,M.; Correia,I.V.T.; Santos,S.A.; Galon,L.
In simple terms, a phytosociological survey is a group of ecological evaluation methods whose aim is to provide a comprehensive overview of both the composition and distribution of plant species in a given plant community. To understand the applicability of phytosociological surveys for weed science, as well as their validity, their ecological basis should be understood and the most suitable ones need to be chosen, because cultivated fields present a relatively distinct group of selecting factors when compared to natural plant communities. For weed science, the following sequence of steps is proposed as the most suitable: (1) overall infestation; (2) phytosociological tables/graphs; (3) intra-characterization by diversity; (4) inter-characterization and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Weed community; Density; Frequency; Dominance; Diversity; Similarity.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582013000200025

Infestation of weed species in monocrop coffee or intercropped with banana, under agroecological system
Provedor de dados: 87
Autores: Concenço,G.; Motta,I.S.; Correia,I.V.T.; Santos,S.A.; Mariani,A.; Marques,R.F.; Palharini,W.G.; Alves,M.E.S.
We aimed with this study to compare weed infestation in coffee under two different cropping managements: conventional coffee grown alone, or intercropped with banana plantation in a year-round basis (late spring, late summer, late fall and late winter). The experiment was installed in 2009 under field conditions at the Escola Municipal Rural Benedita Figueiró de Oliveira, in the city of Ivinhema in the state of Mato Grosso do Sul, Brazil. Assessments of weed occurrence were made three years after employment, on both cropping systems, and density, frequency, dominance and the importance value for each plant species in each system and season were quantified. Plant diversity within each system was estimated by Simpson and Shannon-Weiner indexes. Similarity...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Weed occurrence; Intercrops; Phytosociology.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582014000400001

Occurrence of weed species in Jatropha curcas intercropping systems
Provedor de dados: 87
Autores: Concenço,G.; Silva,C.J.; Correia,I.V.T.; Silva,J.A.N.; Santos,S.A.; Fróes,A.L.; Fábris,D.N.; Staut,L.A.
This study aimed to evaluate the level of infestation by weed species in a consolidated Jatropha plantation, as a function of the plant species grown in interrows. The experiment was installed in 2006 at the district of Itahum, city of Dourados, state of Mato Grosso do Sul, Brazil, made possible through a partnership between Embrapa Western Agriculture and Paraiso Farm. Treatments consisted of (1) Jatropha in monocrop, with no plant at the interrrows; or the following plants cultivaded at the interrows of Jatropha: (2) Stylosanthes spp.; (3) Brachiaria ruziziensis; (4) Brachiaria ruziziensis + Stylosanthess pp.; (5) Brachiaria humidicola; (6) Panicum maximum cv. massai; (7) Cajanus cajan cv. anão; (8) Crotalaria spectabilis; (9) Crop rotation system 1 -...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Jatropha crop; Infestation; Phytosociology.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582014000200010

Desempenho produtivo de bovinos alimentados com cana-de-açúcar com diferentes níveis de concentrado
Provedor de dados: 45
Autores: Salomão,B.M.; Valadares Filho,S.C.; Villela,S.D.J.; Santos,S.A.; Costa e Silva,L.F.; Rotta,P.P.
Foram avaliados o consumo, as digestibilidades totais e ruminais e as taxas de digestão (kd) e de passagem (kp) ruminal dos nutrientes de dietas constituídas de cana-de-açúcar in naturae diferentes níveis de concentrado. Utilizaram-se cinco bovinos mestiços, fistulados no rúmen, com peso corporal inicial de 300±50kg, distribuídos em delineamento em quadrado latino 5x5. As dietas experimentais foram constituídas de: 1) 100% cana-de-açúcar in natura(CA); 2) 80% de CA + 20% de concentrado (C); 3) 60% de CA + 40% de C; 4) 40% de CA + 60% de C; e 5) 20% de CA + 80% de C. Os dados foram analisados utilizando-se o procedimento MIXED do SAS (versão 9.1), bem como análise de regressão e 5% como nível crítico de probabilidade para o erro tipo I. O consumo de matéria...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Consumo; Taxa de passagem; Eficiência microbiana.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352015000401077

Intake, milk production and weight change curves for lactating Holstein x Zebu cows under grazing
Provedor de dados: 45
Autores: Santos,S.A.; Valadares Filho,S.C.; Detmann,E.; Ruas,J.R.M.; Prados,L.F.; Mariz,L.D.S.
The purpose of this study was to evaluate feed intake and develop lactation and weight change curves for Holstein x zebu cows under grazing. Eighteen F1 cows were used, divided into three treatments; 6 were Holstein x Gir (HGI), 6 were Holstein x Guzerat (HGU), and another 6 were Holstein x Nelore (HNE), under the feeding conditions of pasture plus concentrate with 22% of crude protein (CP). To estimate individual feed intake at pasture, 2 markers were used: titanium dioxide to estimate fecal dry matter (DM) excretion, and the indigestible acid detergent fiber (iADF) to estimate individual pasture intake. The Wood (1967) model was used to evaluate milk yield and the parameters were estimated for each genetic group, as follows: HGI =...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Crossbreeding; F1; Lactation; Tropical grasses.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352014000300827

Alterações séricas de proteína total e eletrólitos em cavalo Pantaneiro durante exercício de longa distância
Provedor de dados: 45
Autores: Santos,S.A.; Silva,R.A.M.S.; Azevedo,J.R.M.; Mello,M.A.R; Soares,A.C.; Sibuya,C.Y.; Anaruma,C.A.
Foram colhidas amostras de sangue de oito cavalos Pantaneiro durante uma prova de resistência de 76km através do Pantanal. Um mês antes da prova os cavalos foram distribuídos em dois grupos: 1- quatro cavalos mantidos em pastagem nativa sem suplementação e sem trabalho; 2- quatro cavalos mantidos em pastagem nativa com suplementação e submetidos a trabalho. Amostras de sangue foram colhidas antes da prova (pré), durante (meio), ao final (pós) e após um período de recuperação de 30 minutos (descanso). Foram analisadas as concentrações séricas de proteína total (PT), albumina (Alb), sódio (Na), potássio (K), cloro (Cl), cálcio (Ca) e fósforo (P). No final da prova também foram colhidas amostras de suor de cinco cavalos para análise de Na, K e Cl. Durante a...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cavalo Pantaneiro; Prova de resistência; Taxa cardíaca; Eletrólito; Proteína.
Ano: 2001
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352001000300013

Genomic alterations detected by comparative genomic hybridization in ovarian endometriomas
Provedor de dados: 56
Autores: Veiga-Castelli,L.C.; Rosa e Silva,J.C.; Meola,J.; Ferriani,R.A.; Yoshimoto,M.; Santos,S.A.; Squire,J.A.; Martelli,L.
Endometriosis is a complex and multifactorial disease. Chromosomal imbalance screening in endometriotic tissue can be used to detect hot-spot regions in the search for a possible genetic marker for endometriosis. The objective of the present study was to detect chromosomal imbalances by comparative genomic hybridization (CGH) in ectopic tissue samples from ovarian endometriomas and eutopic tissue from the same patients. We evaluated 10 ovarian endometriotic tissues and 10 eutopic endometrial tissues by metaphase CGH. CGH was prepared with normal and test DNA enzymatically digested, ligated to adaptors and amplified by PCR. A second PCR was performed for DNA labeling. Equal amounts of both normal and test-labeled DNA were hybridized in human normal...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Endometrioma; Endometriosis; Comparative genomic hybridization; Chromosomal imbalances.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2010000800014